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 know the LINUX version.

Question # 2

Distributed system should.

Question # 3

What is property of UNIX.

Question # 4

Which scheduling policy is best suited for time sharing operating system.

Question # 5

Default permissions of file can be changed with.

Question # 6

The part of machine level instruction which tells the central processor what has to be done is.

Question # 7

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

Question # 8

Which command changes a files group owner

Question # 9

Which among the following is used to write small program to control Linux Functionalities.

Question # 10

Which command is used to set terminal input output characteristics

Question # 11

What is the maximum number of processes that may enter simultaneously inside the critical section to avoid race condition.

Question # 12

Dirty bit is used ot show

Question # 13

Macintosh computer uses

Question # 14

Which among following is considered as super daemon.

Question # 15

Which among following scheduling algorithms give minimum average waiting time.

Question # 16

If two files on same partition point to the same inode structure they are called.

Question # 17

Remote computing services involves the use of time sharing and

Question # 18

Disk scheduling includes decinding

Question # 19

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

Question # 20

Shortest job First executes first the job.

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 A hardware device which is capable of executing a sequence of instructions, is known as.
A. CPU
B. ALU
C. CU
D. Processor
2 A high paging rate
A. May cause a high I/O rate
B. Keeps the system running well
C. Is a symptom of too much processor activity
D. Always creates a slow system.
3 Remote computing services involves the use of.
A. Multi processing
B. Multi programming
C. Batch processing
D. Real time processing
4 Semaphores are used to solve the problem of.
A. Race condition
B. Process synchronization
C. Mutual exclusion
D. Belady problem
5 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
6 In which of the following usually a front end processor is used.
A. Virtual storage
B. Time sharing
C. Multi programming
D. Multi heading
7 Which among the following is used to write small program to control Linux Functionalities.
A. Shell commands
B. Shell script
C. C
D. Java
8 which option of 'grep' displays the line number as well.
A. -n
B. -i
C. -d
D. -al
9 Which command changes a files group owner
A. chmod
B. chgrp
C. chown
D. chgrep
10 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

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