PPSC Computer Science Topic 19 MCQ's Test Preparation

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MCQ's Test For PPSC Computer Science Topic 19 Operating System

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PPSC Computer Science Topic 19 Operating System

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Question # 1

By which command content of a file can be searched.

Question # 2

Memory protection is normally done by

Question # 3

Semaphores are used to solve the problem of.

Question # 4

File record length

Question # 5

Super visor state is only allowed to.

Question # 6

Banker's algorithm deals with

Question # 7

Which of the following memory allocation scheme is subject to external fragmentation.

Question # 8

When did IBM released the first version of its disk operating system DOS version 1.0

Question # 9

Belady anomaly occurs in.

Question # 10

Which type of software can be used to merge data of two files in one files.

Question # 11

Which one is true.

Question # 12

Reference bit is used for

Question # 13

Which of the following does not interrupt an running process.

Question # 14

Which among following is considered as super daemon.

Question # 15

Dynamic allocation of storage areas with VSAM files is accomplished by

Question # 16

The system calls in UNIX is written using which language.

Question # 17

How applications communicates with kernel.

Question # 18

Which is signal user operating system.

Question # 19

How many links are created when we create a directory file.

Question # 20

Seek analysis is for.

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 Which command changes a files group owner
A. chmod
B. chgrp
C. chown
D. chgrep
2 Which among following scheduling algorithms give minimum average waiting time.
A. FCFS
B. SJF
C. Round rabin
D. On priority
3 Main function of shared memory is.
A. To use primary memory efficiently
B. To do intra process communication
C. All of above
D. None
4 Kernel minimizes the frequency of disk access by keeping a pool of internal data buffer which helps to increase the response time this is known as.
A. Buffer cache
B. Spooling
C. Pooling
D. Virtual memory
5 Which technique is used by operating systems to execute several program concurrently by switching back and forth.
A. Partitioning
B. Multitasking
C. Windowing
D. Paging
6 By which command content of a file can be searched.
A. grep
B. search
C. srh
D. show
7 Which type of software can be used to merge data of two files in one files.
A. System software
B. Networking software
C. Documenting software
D. utility software
8 By which of following the problem of thrashing is significantly affected.
A. Program size
B. Program structure
C. Primary storage
D. Secondary strorage
9 Which command reads the content of another file in vi editor .
A. erd
B. ex
C. r
D. read
10 Which command is concerned with LINUX kernel log messages.
A. dmsg
B. dmesg
C. cmsg
D. cmesg

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