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

Which command is used to set limits on file size.

Question # 2

By which command content of a file can be searched.

Question # 3

Which technique is used by operating systems to execute several program concurrently by switching back and forth.

Question # 4

What is the name of values that are automatically provided by software to reduce keystrokes.

Question # 5

Main function of shared memory is.

Question # 6

All device files are stored in which directory.

Question # 7

Fragmentation of a file system.

Question # 8

Which one shows the name of the operating system.

Question # 9

Which is signal user operating system.

Question # 10

Which is not a valid file type in LINUX.

Question # 11

Dirty bit is used ot show

Question # 12

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

Question # 13

Which of following need a device driever.

Question # 14

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

Question # 15

How applications communicates with kernel.

Question # 16

What is the command that can print lines of first file matching with second file.

Question # 17

File can have.

Question # 18

Scissoring enables

Question # 19

What is the meaning of SVR 4

Question # 20

Which command gives the first byte where the difference is in the file 1 & file2

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 Macintosh computer uses
A. System 7.0
B. AU/X
C. Xenix
D. None
2 Which command gives the first byte where the difference is in the file 1 & file2
A. Diff
B. differ
C. Cmp
D. Compare
3 Which command in vi editor command is used to copy the current line of the file.
A. ys
B. yy
C. yc
D. yw
4 Dirty bit is used ot show
A. Page with corrupted data
B. Wrong page in memory
C. Page that a modified after being loaded in the cache memory
D. Page that is less frequently accessed
5 A thread is.
A. Lightweight process where the context switching is low
B. Lightweight process where the context switching is high
C. Used to speed up paging
D. Used in dead locks
6 Default permissions of file can be changed with.
A. Group
B. Chperm
C. chmod
D. Chall
7 Reference bit is used for
A. Implementing LRU page replacement algorithm
B. Implementing NRU algorithm
C. To check the page table entry in the cache memory
D. None of above
8 When did IBM released the first version of its disk operating system DOS version 1.0
A. 1981
B. 1982
C. 1983
D. 1984
9 Which command is used to set limits on file size.
A. U limit
B. Alimit
C. dlimit
D. wilmit
10 What is the name of values that are automatically provided by software to reduce keystrokes.
A. Data values
B. Default values
C. Defined values
D. Fixed vallues

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