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 control character signals the end of the input file.

Question # 2

Default permissions of file can be changed with.

Question # 3

Poor response times are caused by

Question # 4

Which command is used to set terminal input output characteristics

Question # 5

If two files on same partition point to the same inode structure they are called.

Question # 6

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

Question # 7

Which command can be used to know the present working directory.

Question # 8

Which of the following does not interrupt an running process.

Question # 9

Which is non pre emptive

Question # 10

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

Question # 11

Banker's algorithm deals with

Question # 12

Which command is used to copy files.

Question # 13

A high paging rate

Question # 14

Super visor state is only allowed to.

Question # 15

Which operating system use write through catches.

Question # 16

Which one shows the name of the operating system.

Question # 17

Re location bits used by relocating loader are a pacified by

Question # 18

What is the command that can print lines of first file matching with second file.

Question # 19

Which command is concerned with LINUX kernel log messages.

Question # 20

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

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 File inode number can be viewed by.
A. -8
B. -1
C. -a
D. -t
2 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
3 Remote computing services involves the use of.
A. Multi processing
B. Multi programming
C. Batch processing
D. Real time processing
4 The system calls in UNIX is written using which language.
A. Java
B. C
C. C++
D. Assembly
5 In real time OS, which is most suitable scheduling scheme.
A. Round robin
B. FCFS
C. Pre-emptive scheduling
D. Random scheduling
6 Which technique is used by operating systems to execute several program concurrently by switching back and forth.
A. Partitioning
B. Multitasking
C. Windowing
D. Paging
7 if the CPU scheduling policy is FCFS then what would be average waiting time.
A. 10 ms
B. 10.8 ms
C. 12 ms
D. 12.8 ms
8 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
9 To display disk consumption of a specific directory which command is used.
A. dd
B. du
C. dt
D. di
10 The part of machine level instruction which tells the central processor what has to be done is.
A. Operation code
B. Address
C. Locator
D. Flip flop

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