Operating System MCQs

Question 1

Block caches or buffer caches are used

Accepted Answer

to improve disk performance

Answer

to handle interrupts

Answer

to increase the capacity of the main memory

Answer

to speed up main memory read operation

Question 2

Which of the following statements is false?

Accepted Answer

internal fragmentation is increased with small pages

Answer

a small page size causes large page tables

Answer

a large page size causes instructions and data that will not be referenced brought into primary storage

Answer

I/O transfers are more efficient with large pages

Question 3

The action of parsing the source program into the proper syntactic classes is known as

Accepted Answer

lexical analysis

Answer

syntax analysis

Answer

interpretation analysis

Answer

general syntax analysis

Question 4

Which, of the following is not true about the description of a decision table?

Accepted Answer

A decision table is directly understood by the computer

Answer

A decision table is easy to modify

Answer

A decision table is easy to understand

Answer

All of the above

Question 5

Trojan-Horse programs

Accepted Answer

are legitimate programs that allow unauthorized access

Answer

do not usually work

Answer

are hidden programs that do not show up on the system

Answer

usually are immediately discovered

Question 6

When did IBM release the first version of disk operating system DOS version 1.0?

Accepted Answer

1981

Answer

1982

Answer

1983

Answer

1984

Question 7

Which of the following is false about disk when compared to main memory?

Accepted Answer

faster

Answer

non-volatile

Answer

longer storage capacity

Answer

lower price per bit

Question 8

Producer consumer problem can be solved using

Accepted Answer

all of the above

Answer

semaphores

Answer

event counters

Answer

monitors

Question 9

Most of the microcomputer's operating systems like Apple DOS, MS DOS and PC DOS etc. are called disk operating systems because

Accepted Answer

they are initially stored on disk

Answer

they are memory resident

Answer

they are available on magnetic tapes

Answer

they are partly in primary memory and partly on disk