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

In vi editor which command sets the number for all lines.

Question # 2

How applications communicates with kernel.

Question # 3

File can have.

Question # 4

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

Question # 5

Which command reads the content of another file in vi editor .

Question # 6

Remote computing services involves the use of.

Question # 7

Dynamic allocation of storage areas with VSAM files is accomplished by

Question # 8

Which process is known for initializing a microcomputer with its OS.

Question # 9

Poor response times are caused by

Question # 10

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

Question # 11

A thread is.

Question # 12

Main function of shared memory is.

Question # 13

Reference bit is used for

Question # 14

Which one is true.

Question # 15

What are the global locks.

Question # 16

Which command in vi editor command is used to copy the current line of the file.

Question # 17

Scissoring enables

Question # 18

Distributed system should.

Question # 19

if the CPU scheduling policy is FCFS then what would be average waiting time.

Question # 20

Memory protection is normally done by

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 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
2 How many links are created when we create a directory file.
A. 1
B. 2
C. 3
D. 4
3 What are the global locks.
A. They synchronize access to local resources.
B. They synchronize access to global resources
C. They synchronize access to local and global resources
D. None of above
4 Scissoring enables
A. A part of data to be displayed
B. Entire data to be displayed
C. Full data display on full area of seen
D. No data display
5 Which of the following memory allocation scheme is subject to external fragmentation.
A. Segmentation
B. Swapping
C. Demand paging
D. Multiple contiguous fixed partitions
6 Problem of thrashing is affected significantly by
A. Program structure
B. Program size
C. Primary storage size
D. All of above
7 Which command is used to set limits on file size.
A. U limit
B. Alimit
C. dlimit
D. wilmit
8 In which scheduling policies context switching never takes place
A. FCFS
B. Round robin
C. Shortest job first
D. Pre empitive
9 Which LINUX command is used to update the modification time of a file.
A. UPDATE
B. MODIFY
C. TOUCH
D. UNTOCUH
10 Main function of shared memory is.
A. To use primary memory efficiently
B. To do intra process communication
C. All of above
D. None

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