Operating System (GATE Computer Science): Questions 120 - 126 of 129

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Question number: 120

» Operating System » CPU Scheduling

MCQ▾

Question

Which scheduling policy is most suitable for a time –shared operating system?

Choices

Choice (4) Response
a.

Shortest job first

b.

FIFO

c.

Round robin

d. All of the above

Question number: 121

» Operating System » Inter-Process Communication

MCQ▾

Question

The section of code which accesses shared variables is called as ________.

Choices

Choice (4) Response
a.

Critical section

b.

Block

c.

Semaphore

d. Question does not provide sufficient data or is vague

Question number: 122

» Operating System » Memory Management and Virtual Memory

MCQ▾

Question

A program is located in the smallest available hole in the memory is

Choices

Choice (4) Response
a.

worst-fit

b.

best fit

c.

first-bit

d. None of the above

Question number: 123

» Operating System » Memory Management and Virtual Memory

MCQ▾

Question

How can the user determine what programs are available on a computer?

Choices

Choice (4) Response
a.

Viewing the installed programs during the booting process

b.

Checking the operating system for a list of installed programs

c.

Checking the hard disk properties

d. All of the above

Question number: 124

» Operating System » Memory Management and Virtual Memory

MCQ▾

Question

Which are the factor of cache memory:

Choices

Choice (4) Response
a.

Size organization of the cache

b.

Architecture of the microprocessor?

c.

Properties of the programs being executed

d. All a. , b. and c. are correct

Question number: 125

» Operating System » Input-Output Systems

MCQ▾

Question

The operating system of a computer serves as a software interface between the user and the ________.

Choices

Choice (4) Response
a.

Hardware

b.

Memory

c.

Screen

d.

Peripheral

Question number: 126

» Operating System » CPU Scheduling

MCQ▾

Question

Which formula is used to calculate the number of write stall cycles:

Choices

Choice (4) Response
a.

Write* (Write miss rate * Write miss penalty) +write buffer stalls

b.

Reads * Read miss rate * Read miss penalty

c.

Memory access * Cache miss rate + write buffer stalls

d. None of the above

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