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

Fragmentation of a file system.

Question # 2

Which is not a valid file type in LINUX.

Question # 3

Which one shows the name of the operating system.

Question # 4

File inode number can be viewed by.

Question # 5

How applications communicates with kernel.

Question # 6

To avoid the race condition the number of process that may be simultaneously inside the critical section is

Question # 7

Which one is true.

Question # 8

Creating a job queue is a function of

Question # 9

Which among following is considered as super daemon.

Question # 10

Belady anomaly occurs in.

Question # 11

Problem of thrashing is affected significantly by

Question # 12

Which command changes a files group owner

Question # 13

Re location bits used by relocating loader are a pacified by

Question # 14

Which scheduling policy is most suitable for time shared operating system.

Question # 15

In which scheduling policies context switching never takes place

Question # 16

Macintosh computer uses

Question # 17

Which is signal user operating system.

Question # 18

Which command is used to know the LINUX version.

Question # 19

A thread is.

Question # 20

Which LINUX command is used to update the modification time of a file.

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 Which among following is considered as super daemon.
A. Sysinit
B. Grep
C. Init
D. Locate
2 What control character signals the end of the input file.
A. Ctrl + s
B. Ctrl + z
C. Ctrl + w
D. Ctrl + d
3 The system calls in UNIX is written using which language.
A. Java
B. C
C. C++
D. Assembly
4 All device files are stored in which directory.
A. /etc
B. /dev
C. /www
D. /html
5 Distributed system should.
A. High security
B. Have better resource sharing
C. Better system utilization
D. Low system overhead
6 Four necessary conditions for dead lock are none pre emption circular wait and
A. Mutual exclusion
B. Race condition
C. Buffer overflow
D. None of above
7 For multiprogramming operating system.
A. Special support from processor is essential
B. Special support from processor is not essential
C. Cache memory is essential
D. None of abvoe
8 In vi editor which command sets the number for all lines.
A. Set nu
B. Set ni
C. Set sn
D. Set sl
9 A publics key encryption system.
A. Allows only the correct sender to decode the data
B. Allows only the correct receiver to decode the data
C. Allows any one to decode the data
D. None of above
10 To display disk consumption of a specific directory which command is used.
A. dd
B. du
C. dt
D. di

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