1000+ Operating System Questions & Answers for Competitive Exams - 1

Question: 1

The FIFO algorithm

(A) executes first the job with the least processing needs

(B) execute first the job that has been in the queue the longest

(C) executes first the job that last entered the queue

(D) executes first the job that first entered the queue

Ans: D

executes first the job that first entered the queue

Question: 2

Operating system is

(A) a collection of software routines

(B) a collection of input output devices

(C) a collection of hardware components

(D) all of these

Ans: A

a collection of software routines

Question: 3

Interprocess communication

(A) allows processor to synchronise activity

(B) is very necessary

(C) is usually done via disk drives

(D) is required for all processes

Ans: B

is very necessary

Question: 4

Scheduling is

(A) the same regard less of the purpose of the system

(B) not required in uniprocessor systems

(C) unrelated performance consideration

(D) allowing jobs to use the processor

Ans: D

allowing jobs to use the processor

Question: 5

Trojan Horse Programs

(A) usually are immediately discovered

(B) are hidden programs that do not show up on the system

(C) do not usually work

(D) are legitimate programs that allows unauthorized access

Ans: D

are legitimate programs that allows unauthorized access

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