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

Question # 2

Belady anomaly occurs in.

Question # 3

What are the global locks.

Question # 4

Daisy chain is a device for

Question # 5

Spooling most beneficial where

Question # 6

What is the name of values that are automatically provided by software to reduce keystrokes.

Question # 7

Which command in LINUX is used for description any command.

Question # 8

Creating a job queue is a function of

Question # 9

Fragmentation of a file system.

Question # 10

Which of the following is always there in a computer.

Question # 11

Which command in vi editor command is used to copy the current line of the file.

Question # 12

A thread is.

Question # 13

Which command is concerned with LINUX kernel log messages.

Question # 14

A high paging rate

Question # 15

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

Question # 16

Which command changes a files group owner

Question # 17

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

Question # 18

The system calls in UNIX is written using which language.

Question # 19

What control character signals the end of the input file.

Question # 20

Scissoring enables

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 What is the meaning of SVR 4
A. System five release 4
B. System version release 4
C. System five relocated 4
D. Storage files five release 4
2 Which operating system reacts in the acutal time.
A. Batch system
B. Quick response system
C. Real time system
D. Time sharing system
3 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
4 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
5 Which command gives the first byte where the difference is in the file 1 & file2
A. Diff
B. differ
C. Cmp
D. Compare
6 Banker's algorithm deals with
A. Dead lock prevention
B. Dead lock avoidance
C. Dead look recovery
D. Mutual exclusion
7 Size of virtual memory depends on
A. Size of data bus
B. Size of address bus
C. Size of main memory
D. None of above
8 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
9 In real time OS, which is most suitable scheduling scheme.
A. Round robin
B. FCFS
C. Pre-emptive scheduling
D. Random scheduling
10 If two files on same partition point to the same inode structure they are called.
A. Soft links
B. Hard links
C. Copy links
D. similar links

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