Solved Past Papers MCQs of Lecturer Computer Science

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Solved Past Papers MCQs of Lecturer Computer Science for the preparation of NTS, PPSC, SPSC, BPSC, KPSC, FPSC, OTS, and other academic entry tests and jobs tests.

 

26. LRU page – replacement algorithm associates with each page the …….

A) Time it was brought into memory

B) The time of that pages last use

C) Page after and before it

D) All of these

 

27. For 3 page frames, the following is the reference string: 7 0 1 2 0 3 0 4 2 3 0 3 2 1 2 0 1 7 0 1; How many page faults does the LRU page replacement algorithm produce

A) 10

B) 15

C) 11

D) 12

 

28. CPU fetches the instruction from memory according to the value of

A) Program counter

B) Status register

C) Instruction register

D) Program status word

 

29. A memory buffer used to accommodate a spood differential is called

A) Slack pointer

B) Cache

C) Accumulator

D) Disk buffer

 

30. A process refers to 5 pages A, B, C, D, E in the order A, B, C, D, A, B, E, A, B, C, D, E. If the page replacement algorithm is FIFO, the number of page transfers with Internal store of 3 frames is

A) 8

B) 10

C) 9

D) 7

 

 31. In computer network nodes are

A) The computer that originates the data

B) The computer that routes the data

C) The computer that terminates the data

C) All of the these

 

32. Communication channel is shared by all the machines on the network in

A) Broadcast network

B) Uni-cast network

C) Multicast network

D) Anycast network

 

33. Bluetooth is an example of …….

A) Personal area network

B) Local area network

C) Virtual private network

D) Wide area network

 

34. In virtual circuit, network each packet contains

A) Full source and destination address

B) A short VC number

C) Only source address

D) Only destination address

 

35. Which of the following routing algorithms can be used for network layer design

A) Shortest path algorithm

B) Distance vector routing

C) Link state routing

D) All of these

36. The network layer protocol for internet is

A) Ethernet

B) Internet protocol

C) Hypertext transfer protocol

D) File transfer protocol

 

37. ICMP is primarily used for

A) Error and diagnostic functions

B) Addressing

C) Forwarding

D) Routing

 

38. The lexical analyzer takes ……. as input and produces a stream of ……. as output

A) Source program, tokens

B) Token, source program

C) Both A & B

D) None of these

 

39. Parsing is also known as

A) Lexical Analysis

B) Syntax Analysis

C) Semantic Analysis

D) Code Generatio

 

40. A compiler program written in a high level language is called

A) Source Program

B) Object Program

C) Machine Language Program

D) None of these

 

41. The number of pixels stored in the frame buffer of a graphics system is known as

A) Resolution

B) Depth

C) Mass

D) None of these

 

42. In graphical system, the array of pixels in the picture are stored in

A) Memory

B) Frame buffer

C) Processor

D) All of these

 

43. Which of the following is the key characteristic of hacker

A) Afraid to say they don’t know the answer

B) Willing to find answers on their own

C) Not Willing to find answers on their own

D) All of these

44. A ……. is a device that forwards packets between networks by processing the routing information included in the packet

A) Bridge

B) Firewall

C) Router

D) All of these

 

45.  A list of protocols used by a system, one protocol per layer, is called

A) Protocol architecture

B) Protocol stack

C) Protocol suite

D) Protocol system

 

46. Network congestion occurs

A) In case of traffic overloading

B) When a system terminates

C) When connection between two nodes terminates

D) In case of transfer failure

 

47. Which of the following networks extends a private network across public networks

A) Local area network

B) Virtual private network

C) Enterprise private network

D) Storage area network

 

48. The network layer concerns with ……

A) Bits

B) Frames

C) Packets

D) None of these

 

49. Which one of the following is not a function of network layer

A) Routing

B) Inter-networking

C) Congestion control

D) None of these

 

50. A 4 byte IP address consists of ……

A) Only network address

B) Only host address

C) Network address & host address

D) Network address & MAC address

 

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