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

Question # 2

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

Question # 3

All device files are stored in which directory.

Question # 4

Which of the following does not interrupt an running process.

Question # 5

Which command is LINUX is concerned with backup.

Question # 6

Fragmentation of a file system.

Question # 7

which option of 'grep' displays the line number as well.

Question # 8

Which command can be used to know the present working directory.

Question # 9

Dynamic allocation of storage areas with VSAM files is accomplished by

Question # 10

How applications communicates with kernel.

Question # 11

Four necessary conditions for dead lock are none pre emption circular wait and

Question # 12

By which command content of a file can be searched.

Question # 13

Shortest job First executes first the job.

Question # 14

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

Question # 15

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

Question # 16

A series of statements explaining how the data is to be processed is called.

Question # 17

Re location bits used by relocating loader are a pacified by

Question # 18

Which among following scheduling algorithms give minimum average waiting time.

Question # 19

Problem of thrashing is affected significantly by

Question # 20

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

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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 if the CPU scheduling policy is FCFS then what would be average waiting time.
A. 10 ms
B. 10.8 ms
C. 12 ms
D. 12.8 ms
3 Which is the most important for Multi taskiing.
A. Modularity
B. Time sharing
C. Multi programming
D. Multi user
4 Which command is used to set terminal input output characteristics
A. Atty
B. stty
C. dtty
D. itty
5 Printer in the file structure can be found in.
A. /etc
B. /html
C. /www
D. /dev
6 Which of the following memory allocation scheme is subject to external fragmentation.
A. Segmentation
B. Swapping
C. Demand paging
D. Multiple contiguous fixed partitions
7 Remote computing services involves the use of.
A. Multi processing
B. Multi programming
C. Batch processing
D. Real time processing
8 To avoid the race condition the number of process that may be simultaneously inside the critical section is
A. 1
B. 3
C. 0
D. 12
9 The part of machine level instruction which tells the central processor what has to be done is.
A. Operation code
B. Address
C. Locator
D. Flip flop
10 Memory protection is normally done by
A. The processor and the associated hardware
B. The operating system
C. The compiler
D. The user program

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