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

By which command content of a file can be searched.

Question # 2

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

Question # 3

Remote computing services involves the use of time sharing and

Question # 4

Tee command is used in LINUX for.

Question # 5

Fragmentation of a file system.

Question # 6

Belady anomaly occurs in

Question # 7

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

Question # 8

What is property of UNIX.

Question # 9

Which command is used to copy files.

Question # 10

Which command in LINUX is used for description any command.

Question # 11

A hardware device which is capable of executing a sequence of instructions, is known as.

Question # 12

What are the global locks.

Question # 13

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

Question # 14

Which among following is considered as super daemon.

Question # 15

Semaphores are used to solve the problem of.

Question # 16

A publics key encryption system.

Question # 17

To display disk consumption of a specific directory which command is used.

Question # 18

In real time OS, which is most suitable scheduling scheme.

Question # 19

Super visor state is only allowed to.

Question # 20

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

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 Multiprogramming system
A. Are easier to develop than signal programming system.
B. Execute each job faster
C. Execute more jobs in the same time
D. Are used only on large main frame computers.
2 How many links are created when we create a directory file.
A. 1
B. 2
C. 3
D. 4
3 Which of the following memory allocation scheme is subject to external fragmentation.
A. Segmentation
B. Swapping
C. Demand paging
D. Multiple contiguous fixed partitions
4 Memory protection is normally done by
A. The processor and the associated hardware
B. The operating system
C. The compiler
D. The user program
5 All the abbreviations is vi editor can be shown by
A. All
B. ab
C. atat
D. ashow
6 Which scheduling policy is most suitable for time shared operating system.
A. Shortest job first
B. FCFS
C. LCFS
D. Round robin
7 Which type of software can be used to merge data of two files in one files.
A. System software
B. Networking software
C. Documenting software
D. utility software
8 Daisy chain is a device for
A. Connecting a number of controllers to a device
B. Connecting a number of device to a controller
C. all of above
D. None of above
9 Which is the most important for Multi taskiing.
A. Modularity
B. Time sharing
C. Multi programming
D. Multi user
10 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

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