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

Question # 2

What are the global locks.

Question # 3

Default permissions of file can be changed with.

Question # 4

Reference bit is used for

Question # 5

Multiprogramming system

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

Which one shows the name of the operating system.

Question # 11

What is property of UNIX.

Question # 12

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

Question # 13

Semaphores are used to solve the problem of.

Question # 14

What control character signals the end of the input file.

Question # 15

Which command is used to determine the path of an executable file.

Question # 16

Memory protection is normally done by

Question # 17

Macintosh computer uses

Question # 18

Printer in the file structure can be found in.

Question # 19

How many links are created when we create a directory file.

Question # 20

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

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 Which command is used to set terminal input output characteristics
A. Atty
B. stty
C. dtty
D. itty
2 Which of the following is always there in a computer.
A. Batch system
B. Operating system
C. Time sharing system
D. Controlling system
3 Poor response times are caused by
A. Busy processor
B. High I/O rate
C. High paging rates
D. any of above
4 Which scheduling policy is best suited for time sharing operating system.
A. Shortest job first
B. Round robin
C. First come first serve
D. Elevator
5 If two files on same partition point to the same inode structure they are called.
A. Soft links
B. Hard links
C. Copy links
D. similar links
6 Which one is true.
A. The linkage editor is used to edit program which have to later link together.
B. The linkage editor links object module during compling
C. The linkage editor links objects modules and resolves external reference between them before loading.
D. None of above
7 Belady anomaly occurs in
A. Optimal replacement
B. FIFO
C. LRU
D. Both in FIFO and LRU
8 Which command gives the first byte where the difference is in the file 1 & file2
A. Diff
B. differ
C. Cmp
D. Compare
9 Which of following need a device driever.
A. Cache
B. Disk
C. Main memory
D. Registers
10 Distributed systems should.
A. Meet time constraints
B. Aim better resource sharing
C. Aim better system utilization
D. Aim low system overhead

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