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

A thread is.

Question # 2

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

Question # 3

Default permissions of file can be changed with.

Question # 4

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

Question # 5

Which is not a valid file type in LINUX.

Question # 6

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

Question # 7

All device files are stored in which directory.

Question # 8

Which of following need a device driever.

Question # 9

Scissoring enables

Question # 10

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

Question # 11

Which command is used to record a user login session in a file.

Question # 12

Which one shows the name of the operating system.

Question # 13

Disk scheduling includes decinding

Question # 14

Which one is true.

Question # 15

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

Question # 16

Which command in LINUX is used for description any command.

Question # 17

Dirty bit is used ot show

Question # 18

Tee command is used in LINUX for.

Question # 19

In which scheduling policies context switching never takes place

Question # 20

What control character signals the end of the input file.

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 Banker's algorithm deals with
A. Dead lock prevention
B. Dead lock avoidance
C. Dead look recovery
D. Mutual exclusion
2 Poor response times are caused by
A. Busy processor
B. High I/O rate
C. High paging rates
D. any of above
3 Which of the following does not interrupt an running process.
A. A device
B. Timer
C. Scheduler process
D. Power failure
4 Which command can be used to know the present working directory.
A. pad
B. pww
C. pwd
D. pdd
5 Which process is known for initializing a microcomputer with its OS.
A. Cold booting
B. Boot recording
C. Booting
D. Warm booting
6 What is meaning of ILP32
A. 32 bit integrated Long & Pointer
B. 32 bit integer long & pointer
C. 32 bit integer Long & Point
D. 32 bit integer , Lost & pointer
7 Belady anomaly occurs in.
A. LIFO
B. FIFO
C. LRU
D. NRU
8 In vi editor which command sets the number for all lines.
A. Set nu
B. Set ni
C. Set sn
D. Set sl
9 What is the name of values that are automatically provided by software to reduce keystrokes.
A. Data values
B. Default values
C. Defined values
D. Fixed vallues
10 Distributed system should.
A. High security
B. Have better resource sharing
C. Better system utilization
D. Low system overhead

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