Question # 1

What control character signals the end of the input file.

Choose an answer

Ctrl + s

Ctrl + z

Ctrl + w

Ctrl + d

Problem of thrashing is affected significantly by

Choose an answer

Program structure

Program size

Primary storage size

All of above

A publics key encryption system.

Choose an answer

Allows only the correct sender to decode the data

Allows only the correct receiver to decode the data

Allows any one to decode the data

None of above

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

Choose an answer

10 ms

10.8 ms

12 ms

12.8 ms

Belady anomaly occurs in

Choose an answer

Optimal replacement

FIFO

LRU

Both in FIFO and LRU

How applications communicates with kernel.

Choose an answer

Not disclosed by linux team

SSL

System calls

Shell

Reference bit is used for

Choose an answer

Implementing LRU page replacement algorithm

Implementing NRU algorithm

To check the page table entry in the cache memory

None of above

Which among the following is used to write small program to control Linux Functionalities.

Choose an answer

Shell commands

Shell script

C

Java

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

Choose an answer

One

Two

Three

Four

A hardware device which is capable of executing a sequence of instructions, is known as.

Choose an answer

CPU

ALU

CU

Processor

Which command is used to copy files.

Choose an answer

cp

copy

mv

move

Memory protection is normally done by

Choose an answer

The processor and the associated hardware

The operating system

The compiler

The user program

Macintosh computer uses

Choose an answer

System 7.0

AU/X

Xenix

None

Which command is used to set limits on file size.

Choose an answer

U limit

Alimit

dlimit

wilmit

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

Choose an answer

Shortest job first

Round robin

First come first serve

Elevator

Which command is LINUX is concerned with backup.

Choose an answer

tar

zip

cpio

untar

Disk scheduling includes decinding

Choose an answer

Which should be accessed next

Order in which disk access requests must be serviced

The physical location of the file

the logical location of the file

In vi editor which command sets the number for all lines.

Choose an answer

Set nu

Set ni

Set sn

Set sl

A high paging rate

Choose an answer

May cause a high I/O rate

Keeps the system running well

Is a symptom of too much processor activity

Always creates a slow system.

For multiprogramming operating system.

Choose an answer

Special support from processor is essential

Special support from processor is not essential

Cache memory is essential

None of abvoe

More Classes

Other Links

PPSC Computer Science Chapter 19 Operating System Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer