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

Daisy chain is a device for

Question # 2

Super visor state is only allowed to.

Question # 3

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

Question # 4

By which of following the problem of thrashing is significantly affected.

Question # 5

Printer in the file structure can be found in.

Question # 6

A publics key encryption system.

Question # 7

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

Question # 8

Dirty bit is used ot show

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

Disk scheduling includes decinding

Question # 14

Which among following scheduling algorithms give minimum average waiting time.

Question # 15

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

Question # 16

Kernel minimizes the frequency of disk access by keeping a pool of internal data buffer which helps to increase the response time this is known as.

Question # 17

Which command is LINUX is concerned with backup.

Question # 18

Which one shows the name of the operating system.

Question # 19

What control character signals the end of the input file.

Question # 20

Main function of shared memory is.

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 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
2 Remote computing services involves the use of time sharing and
A. Multiprocessing
B. Interactive processing
C. Batch processing
D. Real time processing
3 Which of following need a device driever.
A. Cache
B. Disk
C. Main memory
D. Registers
4 Which of the following memory allocation scheme is subject to external fragmentation.
A. Segmentation
B. Swapping
C. Demand paging
D. Multiple contiguous fixed partitions
5 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.
6 Which command is used to record a user login session in a file.
A. script
B. Record
C. Copy
D. Session
7 Which command is used to know the LINUX version.
A. Uname
B. Vname
C. Iname
D. s name
8 Dirty bit is used ot show
A. Page with corrupted data
B. Wrong page in memory
C. Page that a modified after being loaded in the cache memory
D. Page that is less frequently accessed
9 Kernel minimizes the frequency of disk access by keeping a pool of internal data buffer which helps to increase the response time this is known as.
A. Buffer cache
B. Spooling
C. Pooling
D. Virtual memory
10 A high paging rate
A. May cause a high I/O rate
B. Keeps the system running well
C. Is a symptom of too much processor activity
D. Always creates a slow system.

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