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Revise operating systems, DBMS, computer networking, OOP, concurrency, memory management, and core CS interview questions.

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1.

Explain access networks.

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2.

What is FTTH? Explain.

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3.

What are types of delay

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4.

Compare packet switching and circuit switching.

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5.

What is Ethernet

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6.

Explain the structure of the Internet as a "network of networks."

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7.

What are packet switches? Explain types.

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8.

Explain guided vs unguided media.

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9.

What is the Internet? Explain in detail.

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10.

Explain cable Internet access.

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11.

What is HFC

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12.

What is a DSLAM

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13.

What is the network edge

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14.

What is a communication link? Explain types of media.

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15.

What is optical fiber

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16.

What is a socket? Explain its role in detail.

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17.

What is queuing delay

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18.

What are network attacks

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19.

What is twisted pair cable

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20.

Explain TCP/IP protocol suite.

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21.

What are end systems? Why are they important

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22.

Explain circuit switching.

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23.

What is encapsulation

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24.

What are data centers? Explain their role.

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25.

What is 5G

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26.

Explain DSL Internet access.

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27.

What is an application-layer protocol? Explain its components.

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28.

What is coaxial cable

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29.

Explain wide-area wireless access.

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30.

What is the role of standardization in networking

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31.

What is layered architecture

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32.

What is a process in networking? Explain communication between processes.

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33.

What is WiFi

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34.

What is a network application? Explain in detail with examples.

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35.

What is statistical multiplexing

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36.

Differentiate between clients and servers.

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37.

Explain the concept of packet switching.

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38.

What is packet loss

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39.

Explain network application architectures in detail.

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40.

What are protocols? Define and explain with examples.

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41.

What is throughput

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42.

What is an ISP? Explain its role.

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43.

Compare DSL, Cable, and FTTH.

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44.

What is the network core

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45.

What is conditional GET

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46.

Explain TCP Tahoe vs Reno.

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47.

Explain SMTP protocol in detail.

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48.

What is Peer-to-Peer (P2P) architecture? Explain in detail.

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49.

What is buffering in streaming

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50.

What is congestion avoidance

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51.

What are sequence numbers and acknowledgment numbers

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52.

What is ECN (Explicit Congestion Notification)

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53.

Explain cumulative acknowledgment in detail.

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54.

What are causes of congestion

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55.

What is half-duplex communication

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56.

What is socket programming? Explain in detail.

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57.

Explain Web caching in detail.

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58.

Explain fast recovery.

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59.

What is fast retransmit

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60.

Why is HTTP stateless? Explain advantages and disadvantages.

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61.

What is video streaming? Explain in detail.

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62.

Explain cookies in detail.

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63.

What is proxy server

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64.

What is SYN flooding attack

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65.

Explain bufferbloat.

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66.

What is congestion control? Explain deeply.

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67.

Explain pipelining in TCP.

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68.

What are transport-layer services available to applications

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69.

Explain RTT estimation in TCP.

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70.

What is DNS caching? Explain importance.

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71.

What is slow start

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72.

What is TCP? Explain in detail.

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73.

What is overlay network

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74.

Explain CDN operation in detail with example.

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75.

What are the principles of reliable data transfer

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76.

Explain Selective Repeat protocol in detail.

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77.

What is AIMD

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78.

What is Web caching

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79.

What is TCP flow control

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80.

Explain UDP socket programming in detail.

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81.

Explain HTTP request message format in detail.

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82.

Explain HTTP in detail.

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83.

Explain different HTTP methods in detail.

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84.

Explain DNS in detail.

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85.

What is full-duplex communication

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86.

Explain the relationship between Transport Layer and Network Layer.

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87.

Explain TCP timeout interval calculation.

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88.

What is REST architecture

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89.

What is a Content Distribution Network (CDN)

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90.

Explain UDP segment structure in detail.

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91.

Explain TCP congestion control phases.

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92.

What is zero window problem

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93.

What is RTT (Round Trip Time)? Explain in detail.

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94.

What is sliding window protocol

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95.

Explain slow start phase in detail.

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96.

Explain TCP congestion window (cwnd).

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97.

What is congestion control

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98.

Explain TCP reliable data transfer in detail.

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99.

Explain stop-and-wait protocol in detail.

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100.

Explain UDP checksum in detail.

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101.

Explain connectionless transport (UDP) in detail.

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102.

What is load balancing in DNS

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103.

What is protocol overhead

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104.

Compare TCP and UDP in detail.

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105.

Explain HTTP response message format in detail.

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106.

What is congestion? Explain in detail.

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107.

Explain TCP segment structure in complete detail.

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108.

What is retransmission in TCP? Explain in detail.

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109.

Explain TCP flow control in detail.

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110.

Explain congestion avoidance phase.

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111.

What is RTT in HTTP

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112.

What is fairness in congestion control

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113.

Explain TCP connection in detail (full internal working).

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114.

Explain causes and costs of congestion.

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115.

What is bandwidth-delay product

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116.

What is application-layer delay

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117.

What is throughput in applications

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118.

Explain non-persistent vs persistent HTTP in detail.

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119.

Compare client-server vs P2P file distribution.

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120.

What is iterative vs recursive DNS

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121.

Explain Go-Back-N protocol in detail.

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122.

What is byte-stream service in TCP? Explain deeply.

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123.

What are approaches to congestion control

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124.

Explain fairness in TCP.

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125.

What is delay-based congestion control

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126.

What is TCP evolution

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127.

Explain DNS resolution process step-by-step.

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128.

Explain TCP connection establishment (3-way handshake).

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129.

What is TCP connection termination

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130.

What is DevRTT? Why is it used

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131.

What is the Transport Layer? Explain its role in detail.

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132.

What is throughput in TCP

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133.

Explain TCP segment structure in detail.

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134.

What is pipelined protocol? Why is it needed

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135.

What is jitter

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136.

What is latency in applications

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137.

Explain TCP socket programming in detail.

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138.

What is DASH? Explain working in detail.

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139.

Explain cookies in depth including components.

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140.

What transport services are required by applications? Explain in detail.

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141.

What is HTTP/2

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142.

What is multiplexing and demultiplexing? Explain in detail.

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143.

Explain the architecture of email system in detail.

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144.

Explain POP3 and IMAP in detail.

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145.

Explain P2P file distribution process in detail.

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146.

What is URI/URL

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147.

Explain input port processing in detail.

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148.

What is longest prefix matching

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149.

What is the network service model? Explain in detail.

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150.

What are modern transport protocols

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151.

What is match-action paradigm? Explain deeply.

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152.

What is peering

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153.

Where is the Link Layer implemented

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154.

What is IPv6? Explain in detail.

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155.

What is packet classification? Explain deeply.

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156.

What is tunneling? Explain in detail.

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157.

What are the classifications of routing algorithms

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158.

Where does queuing occur in routers

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159.

What is the Control Plane? Explain in detail.

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160.

What is a router? Explain its role in detail.

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161.

What is Network Function Virtualization (NFV)

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162.

What is YANG? Explain in detail.

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163.

Explain parity check in detail.

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164.

What is Ethernet? Explain in complete detail.

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165.

Differentiate between forwarding and routing in detail.

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166.

Explain self-learning in switches.

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167.

What is QUIC protocol

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168.

What is IP addressing? Explain in detail.

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169.

Why is CSMA/CD not used in modern Ethernet

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170.

Explain Bellman-Ford equation in detail.

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171.

What is ICMP

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172.

What is SDN (Software Defined Networking)

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173.

What services are provided by the Link Layer

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174.

What is forwarding table

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175.

What is hierarchical routing? Explain in detail.

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176.

Compare IPv4 and IPv6.

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177.

What happens when destination MAC is unknown

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178.

What is SNMP

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179.

What is ARP spoofing? Explain in detail.

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180.

What is MAC address? Explain in detail.

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181.

Explain Ethernet frame structure in detail.

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182.

Explain random access protocols.

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183.

Explain CRC (Cyclic Redundancy Check) in detail.

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184.

What is traffic engineering? Explain deeply.

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185.

Explain SDN architecture in detail.

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186.

Compare Link-State vs Distance Vector.

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187.

Explain Dijkstra’s algorithm in detail.

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188.

What are overlay networks

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189.

What is load balancing? Explain in detail.

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190.

Explain NAT as a middlebox.

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191.

Explain firewalls in detail.

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192.

Explain output port processing in detail.

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193.

What is network monitoring? Explain in detail.

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194.

Explain router architecture in detail.

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195.

What is path vector routing

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196.

Explain packet scheduling in detail.

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197.

What is routing scalability? Explain challenges and solutions.

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198.

What are routing algorithms? Explain their role.

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199.

What is DHCP? Explain in detail.

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200.

What is subnetting? Explain in detail.

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201.

Explain ARP working step-by-step.

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202.

Explain CSMA/CD protocol in detail.

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203.

What is SNMP? Explain architecture in detail.

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204.

What is routing policy

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205.

What is the Network Layer? Explain in detail.

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206.

What are OSPF features

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207.

Explain Link-State routing algorithm in detail.

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208.

What is Software Defined Networking (SDN)? Explain in complete detail.

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209.

What is error detection? Explain in detail.

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210.

What is NETCONF? Explain in detail.

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211.

What is OpenFlow

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212.

What is OSPF? Explain in detail.

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213.

What is Count-to-Infinity problem? Explain deeply.

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214.

What is ARP? Explain in complete detail.

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215.

What is the difference between Data Plane and Control Plane

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216.

Explain TTL field importance.

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217.

What is network virtualization? Explain in detail.

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218.

Explain BGP route selection process.

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219.

Explain checksum method in detail.

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220.

What are multiple access protocols? Explain in detail.

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221.

Explain channel partitioning protocols.

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222.

Explain OpenFlow flow table in detail.

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223.

Explain Distance Vector routing algorithm in detail.

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224.

What is route aggregation? Explain in detail.

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225.

Explain filtering and forwarding in switches.

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226.

Explain switch forwarding table in detail.

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227.

What is switching fabric? Explain types in detail.

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228.

What is Head-of-Line (HOL) blocking

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229.

What is CIDR (Classless Inter-Domain Routing)

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230.

What are middleboxes? Explain in detail.

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231.

What are advantages of SDN and network virtualization

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232.

What are the issues in Link-State routing

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233.

What are problems in Distance Vector routing

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234.

What is BGP? Explain in detail.

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235.

What is fragmentation in IP

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236.

What is the Link Layer? Explain in detail.

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237.

What is Internet structure? Explain in detail.

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238.

What is ICMP? Explain in detail.

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239.

Explain Split Horizon and Poison Reverse.

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240.

What is NAT (Network Address Translation)? Explain deeply.

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241.

Explain IPv4 datagram format in detail.

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242.

What is OpenFlow? Explain in complete detail.

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243.

What is IP Anycast

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244.

What is a switch? Explain in detail.

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245.

What is transit

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246.

What is ARP table

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247.

What is loop prevention in networks

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248.

What is VLAN? Explain in detail.

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249.

Explain Automatic Repeat reQuest (ARQ) protocols.

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250.

How does MPLS work

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251.

What is MTU (Maximum Transmission Unit)

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252.

What is error recovery at link layer

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253.

Differentiate between MAC address and IP address in detail.

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254.

What are challenges in wireless communication

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255.

What is throughput in LAN

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256.

What is fragmentation at link layer

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257.

Why are both MAC and IP addresses required

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258.

What is collision domain? Explain in detail.

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259.

Explain architecture of WLAN in detail.

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260.

How does VLAN work

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261.

What is broadcast storm

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262.

What is link-layer security

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263.

What is a bridge? Explain in detail.

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264.

What are MPLS advantages

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265.

What is VLAN tagging

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266.

What is Forward Error Correction (FEC)

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267.

What is frame error rate

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268.

What is Spanning Tree Protocol (STP)? Explain in complete detail.

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269.

Explain store-and-forward vs cut-through switching.

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270.

What is hidden terminal problem? Explain deeply.

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271.

What are STP port states? Explain in detail.

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272.

Differentiate between bridge and switch.

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273.

What is latency in LAN

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274.

What are advantages of VLANs

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275.

What is MPLS? Explain in detail.

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276.

What is Rapid STP (RSTP)

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277.

What is frame switching? Explain in detail.

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278.

Explain the working of STP step-by-step.

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279.

What is Spanning Tree convergence

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280.

What is a Wireless LAN? Explain in detail.

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281.

What is broadcast domain

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282.

Explain CSMA/CA in wireless networks.

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283.

What are anomalies in databases? Explain all types.

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284.

What is JOIN operation

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285.

What are keys in ER model? Explain all types deeply.

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286.

What is natural join

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287.

What is theta join

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288.

What is Third Normal Form (3NF)

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289.

What are types of triggers

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290.

Mapping M:N relationship

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291.

What is a weak entity? Why is it needed

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292.

Explain structural constraints (cardinality + participation).

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293.

Design an ER model for: A system where Students enroll in courses, Each course has prerequisites, Students can have multiple phone numbers, Some students are teaching assistants.

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294.

What is UML in database design

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295.

Explain PROJECT operation (π).

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296.

Types of JOIN in relational algebra

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297.

Given: Student enrolls Course (M:N). Course has prerequisites (recursive). Convert to relational schema.

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298.

A university system has Students, Faculty. Both are Persons. Faculty can also be students. Design EER model.

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299.

What is the ER model? Why is it used instead of directly designing tables

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300.

What is BCNF (Boyce-Codd Normal Form)

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301.

What is relational algebra

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302.

What are SQL triggers

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303.

What are updatable views

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304.

What is a Functional Dependency (FD)

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305.

What is normalization? Why is it required

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306.

What is schema modification

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307.

Given relation R(A, B, C, D) and FDs: A->B, B->C. Find A+ and Candidate keys.

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308.

What is generalization

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309.

Define entity, entity set, and attribute with examples.

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310.

What are aggregate operations in relational algebra

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311.

What is Second Normal Form (2NF)

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312.

What is identifying relationship

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313.

What is division operation

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314.

Types of relational calculus

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315.

Difference between 3NF and BCNF

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316.

Given R(A, B, C, D, E) and FDs: A->B, BC->D, D->E. Find Candidate keys and Minimal cover.

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317.

What are Armstrong's axioms

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318.

What is inheritance in EER

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319.

What is a relationship? Explain degree and roles.

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320.

What are phases of database design

Med
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321.

What is First Normal Form (1NF)

Med
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322.

Explain types of attributes with detailed examples.

Med
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323.

What are basic operations in relational algebra

Med
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324.

What is UNION operation

Med
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325.

What is expressive power of queries

Med
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326.

Given R(A, B, C) with FDs: A->B, B->A. Is it in BCNF

Med
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327.

Design a system where: Employees work on projects. Employees can manage employees. Projects require multiple employees. Some employees are part-time.

Med
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328.

Explain SELECT operation (σ).

Med
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329.

What is TRC

Med
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330.

How do you map ER model to relational schema

Med
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331.

Types of Functional Dependencies

Med
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332.

Why is skipping conceptual design dangerous

Med
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333.

Mapping weak entity

Med
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334.

What is category (union type)

Med
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335.

What is attribute closure? Why is it important

Med
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336.

What is specialization? Explain with constraints.

Med
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337.

What is relational calculus

Med
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338.

What is Cartesian product

Med
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339.

What is set difference

Med
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340.

What is DRC

Med
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341.

What is assertion in SQL

Med
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342.

Types of failures

Med
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343.

What is optimistic concurrency control

Med
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344.

What is minimal cover

Med
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345.

Given 1 million records, sparse index with 1 entry per block, and block size = 100 records. Find index entries.

Med
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346.

What is query optimization

Med
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347.

Static vs Dynamic Hashing

Med
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348.

What is a dense vs sparse index

Med
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349.

What is ARIES recovery algorithm

Med
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350.

Why does 2PL guarantee serializability but can cause deadlocks

Med
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351.

Explain collision in hashing and resolution techniques.

Med
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352.

What is join dependency

Med
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353.

What is undo and redo

Med
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354.

Can a system be Highly normalized and Highly performant

Med
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355.

Why do we need indexing in databases

Med
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356.

What is multivalued dependency (MVD)

Med
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357.

What is Fourth Normal Form (4NF)

Med
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358.

Decompose R(A,B,C) with FD A->B. Check lossless.

Med
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359.

Explain ACID properties deeply.

Med
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360.

What is recovery in DBMS

Med
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361.

What is serializability

Med
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362.

Explain conflict serializability with example.

Med
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363.

Explain immediate vs deferred update.

Med
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364.

What is a primary index vs secondary index

Med
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365.

Why is join ordering important

Med
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366.

Why is indexing not always beneficial

Med
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367.

What is checkpointing

Med
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368.

What is locking

Med
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369.

Types of serializability

Med
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370.

Order = 3 B+ Tree. Insert: 10, 20, 30, 40, 50. Draw tree.

Med
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371.

Given R(Student, Course, Instructor) with FDs: Course -> Instructor, (Student, Course) -> Instructor. Normalize.

Med
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372.

Deadlock prevention techniques

Med
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373.

What is Fifth Normal Form (5NF)

Med
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374.

What is B-Tree

Med
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375.

Schedule: T1: Read(A), Write(A). T2: Read(A), Write(A). Is it serializable

Med
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376.

T1 holds A, wants B. T2 holds B, wants A. What happens

Med
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377.

What is two-phase locking (2PL)

Med
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378.

What is a transaction

Med
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379.

What is multilevel indexing

Med
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380.

What is lossless decomposition

Med
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381.

What is deadlock

Med
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382.

What is timestamp ordering

Med
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383.

What is log-based recovery

Med
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384.

Design a system with High concurrency, Fast queries, Large data, Failure-safe. Which techniques will you use

Med
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385.

What are cost-based optimization techniques

Med
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386.

What is dependency preservation

Med
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387.

What is query processing

Med
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388.

Given R(Student, Phone, Hobby) with MVDs Student ->-> Phone, Student ->-> Hobby. Normalize.

Med
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389.

R(Supplier, Part, Project). Find if it needs 5NF.

Med
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390.

What is B+ Tree? Why is it preferred

Med
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391.

What is hashing in DBMS

Med
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392.

What is method overriding

Med
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393.

Explain dependency relationship in UML.

Med
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394.

What is polymorphism in terms of roles

Med
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395.

Explain extensibility in OOP systems.

Med
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396.

Why is deciding classes in OOP not trivial? Explain with example.

Med
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397.

Design system: Animal -> Dog, Cat. Each has different sound. Use polymorphism

Med
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398.

Constructor rules in inheritance (VERY IMPORTANT).

Med
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399.

Explain inheritance in Java deeply with benefits.

Med
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400.

Explain encapsulation with detailed explanation and advantages.

Med
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401.

Why is maintainability a critical issue in software development? How does OOP address it

Med
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402.

What are the four fundamental principles of Object-Oriented Programming? Explain deeply.

Med
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403.

What is bidirectional association? Why is it avoided sometimes

Med
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404.

What is Object class in Java

Med
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405.

Can abstract class have constructors

Med
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406.

Explain polymorphism with real-world and programming examples.

Med
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407.

Explain multiplicity in UML associations with examples.

Med
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408.

What is an association in UML? Explain with deep conceptual clarity.

Med
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409.

Design an object-oriented model for a library system including: Books, Members, Reservations. Explain abstraction, encapsulation, and inheritance in your design.

Med
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410.

What is substitutability in OOP? Why is it critical for polymorphism

Med
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411.

What happens if parent has no default constructor

Med
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412.

What is navigability in UML? Why is it important

Med
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413.

Explain generalization and specialization with examples.

Med
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414.

Explain toString() method.

Med
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415.

What is inheritance in UML

Med
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416.

What are attributes and methods in OOP

Med
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417.

What are interfaces in UML and Java

Med
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418.

Difference between overriding and overloading

Med
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419.

What is composition? Explain deeply with contrast to aggregation.

Med
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420.

Structure of UML class diagram

Med
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421.

What is abstract class

Med
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422.

Explain UML attribute syntax.

Med
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423.

Explain visibility modifiers in UML.

Med
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424.

Explain abstraction with a real-world analogy and its importance in software design.

Med
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425.

Difference between inheritance and interface

Med
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426.

Differentiate between association and dependency.

Med
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427.

What is a class? How is it different from an object

Med
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428.

Explain real-world modelling in OOP. Why is it difficult

Med
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429.

What is UML? Why is it important

Med
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430.

Given system: University has departments, Departments have professors, Professors teach courses. Identify relationships (association/aggregation/composition).

Med
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431.

What is aggregation? Explain with real-world example.

Med
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432.

What is super keyword

Med
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433.

When does substitutability FAIL? Give a conceptual example.

Med
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434.

Explain UML method syntax.

Med
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435.

What is an object? Explain with state and behavior.

Med
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436.

What is access control in inheritance

Med
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437.

What is a UML class diagram

Med
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438.

What is the Collections Framework in Java? Why is it important in OOP

Med
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439.

Why exception handling improves software robustness

Med
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440.

What is the purpose of a case study in OOP

Med
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441.

What are interfaces in Java? Explain deeply.

Med
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442.

Difference between abstract class and interface in design perspective.

Med
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443.

What is Test Driven Development (TDD)

Med
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444.

What is refactoring

Med
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445.

What is Agile programming

Med
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446.

What is try-catch mechanism

Med
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447.

What are steps in OOP system development (case study)

Med
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448.

What are the main interfaces in the Collections Framework

Med
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449.

What happens if abstraction is done poorly during design

Med
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450.

Types of exceptions

Med
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451.

Explain how Collections Framework demonstrates polymorphism.

Med
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452.

What is JDK

Med
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453.

What is Eclipse? Why used

Med
radio_button_unchecked
454.

Difference between JDK, JRE, JVM

Med
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455.

What are class types in polymorphism

Med
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456.

Difference between overloading and overriding (deep understanding)

Med
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457.

Why is overloading useful

Med
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458.

How do you identify classes from problem statement

Med
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459.

What is "distinguishing subclasses"? Why needed

Med
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460.

Explain how polymorphism + inheritance together enable extensibility.

Med
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461.

What is requirements analysis in OOP

Med
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462.

What is unit testing

Med
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463.

What is custom exception

Med
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464.

What is an exception? Why needed

Med
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465.

Design a system for: "Library + digital + physical books + users". Apply: Abstraction, Inheritance, Polymorphism.

Med
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466.

Can return type alone distinguish overloaded methods

Med
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467.

Design a messaging system with: Clients, Messages, Exceptions, Extensibility. Explain ALL OOP concepts.

Med
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468.

What are CRC cards

Med
radio_button_unchecked
469.

What are typed vs untyped collections

Med
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470.

What is method overloading

Med
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471.

Why IDEs are important in large OOP systems

Med
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472.

Why is identifying scope important

Med
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473.

Given system: "Online shopping system". Identify: Classes, Attributes, Methods.

Med
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474.

What is throwing an exception

Med
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475.

Explain Set and its importance in data integrity.

Med
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476.

When should you use List vs Set vs Map? Explain with system design example.

Med
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477.

What is JRE

Med
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478.

What is JUnit

Med
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479.

What is NetBeans

Med
radio_button_unchecked
480.

Why are interfaces important for extensibility

Med
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481.

Is overloading runtime or compile-time

Med
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482.

What is regression testing

Med
radio_button_unchecked
483.

What is "listing nouns and verbs" technique

Med
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484.

What is elaboration of classes

Med
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485.

What is refining design

Med
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486.

Why TDD improves OOP design

Med
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487.

What is an Operating System? Explain its role in a computer system.

Med
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488.

Explain the different components of a computer system.

Med
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489.

What are the major goals of an Operating System

Med
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490.

What is the kernel? Explain its significance.

Med
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491.

Define bit, byte, word, and storage units.

Med
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492.

What are system programs and application programs

Med
radio_button_unchecked
493.

Why is it difficult to define an Operating System precisely

Med
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494.

Explain the operating system from the system's point of view.

Med
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495.

What is meant by "Operating System as a Government"

Med
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496.

Explain the importance of OS in resource sharing.

Med
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497.

What is the main goal of a computer system

Med
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498.

Explain the operating system from the user's point of view.

Med
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499.

Explain the concept of resource allocation in operating systems.

Med
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500.

What is a process

Med
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501.

What is process scheduling

Med
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502.

What are the advantages and disadvantages of message passing

Med
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503.

Explain the difference between single-user and multi-user systems.

Med
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504.

What are Operating System Services

Med
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505.

What are the types of system calls

Med
radio_button_unchecked
506.

What are virtual machines

Med
radio_button_unchecked
507.

What is system boot and bootstrap program

Med
radio_button_unchecked
508.

Explain process termination in detail.

Med
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509.

Why are system calls important

Med
radio_button_unchecked
510.

What is layered structure

Med
radio_button_unchecked
511.

Explain OS structure types in detail.

Med
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512.

Explain file system manipulation service.

Med
radio_button_unchecked
513.

What is OS generation

Med
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514.

Explain the structure of a process in detail.

Med
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515.

What is a monolithic structure

Med
radio_button_unchecked
516.

What are process states

Med
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517.

What are different execution possibilities after process creation

Med
radio_button_unchecked
518.

What are system calls

Med
radio_button_unchecked
519.

Explain process creation in detail.

Med
radio_button_unchecked
520.

What is Interprocess Communication (IPC)

Med
radio_button_unchecked
521.

What are the advantages and disadvantages of shared memory

Med
radio_button_unchecked
522.

What are system programs

Med
radio_button_unchecked
523.

What are device management system calls

Med
radio_button_unchecked
524.

Explain pipes in IPC.

Med
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525.

What is error detection in OS

Med
radio_button_unchecked
526.

Explain file management system calls.

Med
radio_button_unchecked
527.

What are information maintenance system calls

Med
radio_button_unchecked
528.

What are design goals of OS

Med
radio_button_unchecked
529.

What are system programs and their categories

Med
radio_button_unchecked
530.

What is a thread

Med
radio_button_unchecked
531.

Explain operations on processes.

Med
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532.

What is a Process Control Block (PCB)

Med
radio_button_unchecked
533.

Explain process scheduling queues.

Med
radio_button_unchecked
534.

Explain the two models of IPC.

Med
radio_button_unchecked
535.

What is system booting

Med
radio_button_unchecked
536.

Explain benefits of multithreading.

Med
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537.

Explain thread libraries.

Med
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538.

What is OS design and implementation

Med
radio_button_unchecked
539.

What is microkernel

Med
radio_button_unchecked
540.

What is OS structure

Med
radio_button_unchecked
541.

What are virtual machines and their advantages

Med
radio_button_unchecked
542.

Explain communication in client-server systems.

Med
radio_button_unchecked
543.

What is communication service

Med
radio_button_unchecked
544.

What is a scheduler

Med
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545.

What is context switching? Explain in detail.

Med
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546.

Explain multithreading models.

Med
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547.

Explain threading issues.

Med
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548.

What is a Process Control Block (PCB)? Explain all its fields.

Med
radio_button_unchecked
549.

Explain program execution service in OS.

Med
radio_button_unchecked
550.

What are communication system calls

Med
radio_button_unchecked
551.

Explain process control system calls.

Med
radio_button_unchecked
552.

What are user-level and kernel-level threads

Med
radio_button_unchecked
553.

What is OS debugging

Med
radio_button_unchecked
554.

What is I/O operation service

Med
radio_button_unchecked
555.

What is the user interface of an OS

Med
radio_button_unchecked
556.

What are embedded operating systems

Med
radio_button_unchecked
557.

Explain Shortest Job First (SJF).

Med
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558.

What is aging

Med
radio_button_unchecked
559.

What is a scheduling algorithm

Med
radio_button_unchecked
560.

What is preemptive scheduling

Med
radio_button_unchecked
561.

What is safe state

Med
radio_button_unchecked
562.

What is virtual memory? Explain in detail.

Med
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563.

What is multiple-processor scheduling

Med
radio_button_unchecked
564.

Explain deadlock detection.

Med
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565.

Explain recovery from deadlock.

Med
radio_button_unchecked
566.

What is a race condition? Explain with example.

Med
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567.

Explain methods for handling deadlocks.

Med
radio_button_unchecked
568.

What is response time optimization

Med
radio_button_unchecked
569.

Explain page table in detail.

Med
radio_button_unchecked
570.

What is multilevel queue scheduling

Med
radio_button_unchecked
571.

What is queueing model

Med
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572.

Differentiate between paging and segmentation.

Med
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573.

What is paging? Explain in detail.

Med
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574.

What are monitors? Explain in detail.

Med
radio_button_unchecked
575.

What is multilevel feedback queue

Med
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576.

Explain CPU utilization and throughput.

Med
radio_button_unchecked
577.

What is thread scheduling

Med
radio_button_unchecked
578.

What is implementation evaluation

Med
radio_button_unchecked
579.

Explain deadlock prevention.

Med
radio_button_unchecked
580.

What is memory management? Explain in detail.

Med
radio_button_unchecked
581.

What are scheduling criteria

Med
radio_button_unchecked
582.

What is algorithm evaluation

Med
radio_button_unchecked
583.

What is deterministic modeling

Med
radio_button_unchecked
584.

What is scheduling in modern OS

Med
radio_button_unchecked
585.

What is CPU scheduling

Med
radio_button_unchecked
586.

Explain Priority Scheduling.

Med
radio_button_unchecked
587.

What is segmentation? Explain in detail.

Med
radio_button_unchecked
588.

What is starvation

Med
radio_button_unchecked
589.

What is simulation in scheduling

Med
radio_button_unchecked
590.

What is context switch overhead

Med
radio_button_unchecked
591.

What is dispatch latency

Med
radio_button_unchecked
592.

Explain Round Robin Scheduling.

Med
radio_button_unchecked
593.

Explain First-Come, First-Served (FCFS).

Med
radio_button_unchecked
594.

What are fragmentation types? Explain in detail.

Med
radio_button_unchecked
595.

What is address binding? Explain in detail.

Med
radio_button_unchecked
596.

What is real-time scheduling

Med
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597.

Explain deadlock avoidance.

Med
radio_button_unchecked
598.

What is fairness in scheduling

Med
radio_button_unchecked
599.

What is TLB (Translation Lookaside Buffer)? Explain in detail.

Med
radio_button_unchecked
600.

Explain turnaround, waiting, and response time.

Med
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601.

What are semaphores? Explain in detail.

Med
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602.

What is contiguous memory allocation? Explain in detail.

Med
radio_button_unchecked
603.

What are the necessary conditions for deadlock

Med
radio_button_unchecked
604.

What is throughput optimization

Med
radio_button_unchecked
605.

What is process synchronization? Why is it needed

Med
radio_button_unchecked
606.

What is non-preemptive scheduling

Med
radio_button_unchecked
607.

What is the critical-section problem? Explain in detail.

Med
radio_button_unchecked
608.

What are atomic transactions

Med
radio_button_unchecked
609.

Explain busy waiting and its disadvantages.

Med
radio_button_unchecked
610.

Explain Peterson's solution to the critical-section problem.

Med
radio_button_unchecked
611.

What is synchronization hardware? Explain.

Med
radio_button_unchecked
612.

Explain classical synchronization problems.

Med
radio_button_unchecked
613.

What is swapping? Explain in detail.

Med
radio_button_unchecked
614.

What is a deadlock? Explain with example.

Med
radio_button_unchecked
615.

Explain resource allocation graph.

Med
radio_button_unchecked
616.

Explain Banker's Algorithm.

Med
radio_button_unchecked
617.

What is load balancing

Med
radio_button_unchecked
618.

Explain disk management.

Med
radio_button_unchecked
619.

Explain allocation methods in detail.

Med
radio_button_unchecked
620.

Explain file-system implementation.

Med
radio_button_unchecked
621.

What is kernel memory allocation

Med
radio_button_unchecked
622.

Explain I/O hardware.

Med
radio_button_unchecked
623.

What are file access methods? Explain in detail.

Med
radio_button_unchecked
624.

What is system protection

Med
radio_button_unchecked
625.

Explain cryptography in OS.

Med
radio_button_unchecked
626.

What is thrashing

Med
radio_button_unchecked
627.

Explain disk structure in detail.

Med
radio_button_unchecked
628.

Explain protection goals.

Med
radio_button_unchecked
629.

Explain types of threats.

Med
radio_button_unchecked
630.

What is secondary storage? Explain in detail.

Med
radio_button_unchecked
631.

Explain LRU page replacement.

Med
radio_button_unchecked
632.

What is page fault

Med
radio_button_unchecked
633.

What is copy-on-write

Med
radio_button_unchecked
634.

Explain user authentication.

Med
radio_button_unchecked
635.

Explain file-system structure in detail.

Med
radio_button_unchecked
636.

What is I/O system? Explain in detail.

Med
radio_button_unchecked
637.

Explain I/O performance.

Med
radio_button_unchecked
638.

What is demand paging? Explain in detail.

Med
radio_button_unchecked
639.

What is a file? Explain the file concept in detail.

Med
radio_button_unchecked
640.

Explain file-system performance and efficiency.

Med
radio_button_unchecked
641.

What are memory-mapped files

Med
radio_button_unchecked
642.

What is file-system mounting

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643.

Explain kernel I/O subsystem.

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644.

What is system security

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645.

Explain capability-based systems.

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646.

Explain application I/O interface.

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647.

Explain disk scheduling algorithms.

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648.

What is RAID? Explain in detail.

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649.

Explain security classifications.

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650.

Explain FIFO page replacement.

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651.

Explain file sharing and protection.

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652.

Explain page replacement algorithms.

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653.

Explain directory structure in detail.

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654.

Explain free-space management.

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655.

Explain firewalls.

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656.

Explain access matrix.

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CS fundamentals questions for core computer science revision

Use this CS fundamentals question bank to prepare for theory-heavy interview rounds covering operating systems, DBMS, computer networks, object-oriented programming, concurrency, memory management, transactions, indexing, and protocols. Each preview helps you understand what the interviewer is testing before you answer in detail. It is designed for candidates who want quick revision as well as deeper practice before technical screens.