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

What are the global locks.

Question # 2

Distributed systems should.

Question # 3

What is meaning of ILP32

Question # 4

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

Question # 5

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

Question # 6

Which is signal user operating system.

Question # 7

Spooling most beneficial where

Question # 8

All device files are stored in which directory.

Question # 9

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

Question # 10

Which command gives the first byte where the difference is in the file 1 & file2

Question # 11

All the abbreviations is vi editor can be shown by

Question # 12

Which command is used to set limits on file size.

Question # 13

Which operating system use write through catches.

Question # 14

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

Question # 15

Which command is LINUX is concerned with backup.

Question # 16

Semaphores are used to solve the problem of.

Question # 17

Scissoring enables

Question # 18

Size of virtual memory depends on

Question # 19

Four necessary conditions for dead lock are none pre emption circular wait and

Question # 20

Which of the following does not interrupt an running process.

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 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
2 Four necessary conditions for dead lock are none pre emption circular wait and
A. Mutual exclusion
B. Race condition
C. Buffer overflow
D. None of above
3 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.
4 Shortest job First executes first the job.
A. With the least processor needs
B. That first entered the queue
C. That has been in the queue for the longest
D. That last entered the queue
5 Remote computing services involves the use of time sharing and
A. Multiprocessing
B. Interactive processing
C. Batch processing
D. Real time processing
6 Which command is used to extract a column from a text file.
A. get
B. tar
C. untar
D. cut
7 Which command is used to set limits on file size.
A. U limit
B. Alimit
C. dlimit
D. wilmit
8 Belady anomaly occurs in
A. Optimal replacement
B. FIFO
C. LRU
D. Both in FIFO and LRU
9 Which is the most important for Multi taskiing.
A. Modularity
B. Time sharing
C. Multi programming
D. Multi user
10 Poor response times are caused by
A. Busy processor
B. High I/O rate
C. High paging rates
D. any of above

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