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 one is true.

Question # 2

Which of following need a device driever.

Question # 3

By which command content of a file can be searched.

Question # 4

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

Question # 5

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

Question # 6

What is meaning of ILP32

Question # 7

Which command is used to set limits on file size.

Question # 8

Scissoring enables

Question # 9

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

Question # 10

Which among following scheduling algorithms give minimum average waiting time.

Question # 11

Dirty bit is used ot show

Question # 12

Which operating system use write through catches.

Question # 13

A publics key encryption system.

Question # 14

For multiprogramming operating system.

Question # 15

What communication command provides communication to another user logged on by writing to the bottom of their terminal

Question # 16

Dijkstra's algorithm deals with

Question # 17

Which command in LINUX is used for description any command.

Question # 18

Which of the following is always there in a computer.

Question # 19

What the name given to the values that are automatically provided by software to reduce keystrokes and improve a computer users productivity.

Question # 20

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

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Sr.# Question Answer
1 Super visor state is only allowed to.
A. Utility softwares
B. Application sotware
C. Operating system
D. Guest user
2 Fragmentation of a file system.
A. Occurs only is file is not used properly
B. Can always the prevented
C. Happens in all file systems.
D. Can be removed by conmpaction
3 How applications communicates with kernel.
A. Not disclosed by linux team
B. SSL
C. System calls
D. Shell
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 is not a valid file type in LINUX.
A. Socket
B. FIFO
C. Soft link
D. Inode
6 Memory protection is normally done by
A. The processor and the associated hardware
B. The operating system
C. The compiler
D. The user program
7 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
8 Which command changes a files group owner
A. chmod
B. chgrp
C. chown
D. chgrep
9 Which of following need a device driever.
A. Cache
B. Disk
C. Main memory
D. Registers
10 By which command content of a file can be searched.
A. grep
B. search
C. srh
D. show
11 What is the command that can print lines of first file matching with second file.
A. Printline
B. cmp
C. com
D. comn
12 Solaris is product of.
A. IBP
B. IBM
C. Microsoft
D. Sun microsystmes
13 Which of the following is always there in a computer.
A. Batch system
B. Operating system
C. Time sharing system
D. Controlling system
14 A hardware device which is capable of executing a sequence of instructions, is known as.
A. CPU
B. ALU
C. CU
D. Processor
15 Macintosh computer uses
A. System 7.0
B. AU/X
C. Xenix
D. None
16 Which of the following does not interrupt an running process.
A. A device
B. Timer
C. Scheduler process
D. Power failure
17 What is the maximum number of processes that may enter simultaneously inside the critical section to avoid race condition.
A. One
B. Two
C. Three
D. Four
18 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
19 Spooling most beneficial where
A. Jobs are I/O bound
B. Jobs are CPU bound
C. Jobs are evenly divided as I/O bound are CPU bond
D. All of above
20 A publics key encryption system.
A. Allows only the correct sender to decode the data
B. Allows only the correct receiver to decode the data
C. Allows any one to decode the data
D. None of above

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