Operating System MCQs

Question 1

Round-robin scheduling

Accepted Answer

gives each task the same chance at the processor

Answer

allows interactive tasks quicker access to the processor

Answer

is quite complex to implement

Answer

allows processor-bound tasks more time in the processor

Question 2

What is the name of the system which deals with the running of the actual computer and not with the programming problems?

Accepted Answer

Systems program

Answer

Operating system

Answer

Object program

Answer

Source program

Question 3

What is the initial value of the semaphore to allow only one of the many processes to enter their critical section?

Accepted Answer

1

Answer

8

Answer

16

Answer

0

Question 4

Four necessary conditions for deadlock to exist are: mutual exclusion, no-preemption, circular wait and

Accepted Answer

hold and wait

Answer

deadlock avoidance

Answer

race around condition

Answer

buffer overflow

Question 5

If you do not know which version of MS-DOS you are working with, which command will you use after having booted your operating system?

Accepted Answer

VER command

Answer

FORMAT command

Answer

DIR command

Answer

DISK command

Question 6

A partitioned data set is most used for

Accepted Answer

a program or source library

Answer

storing program data

Answer

storing backup information

Answer

storing ISAM files

Question 7

Page-map table is

Accepted Answer

Used for address translation

Answer

A data file

Answer

A directory

Answer

All of the above

Question 8

The main function of the dispatcher (the portion of the process scheduler) is

Accepted Answer

assigning ready process to the CPU

Answer

swapping a process to the disk

Answer

suspending some of the processes when the CPU load is high

Answer

bring processes from the disk to the main memory

Question 9

The errors that can be pointed out by the compiler are

Accepted Answer

Syntax errors

Answer

Semantic errors

Answer

Logical errors

Answer

Internal errors