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Welcome to the Operating System MCQs Page

Dive deep into the fascinating world of Operating System with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Operating System, a crucial aspect of UGC CBSE NET Exam. In this section, you will encounter a diverse range of MCQs that cover various aspects of Operating System, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within UGC CBSE NET Exam.

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Check out the MCQs below to embark on an enriching journey through Operating System. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of UGC CBSE NET Exam.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Operating System. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Operating System MCQs | Page 13 of 21

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Q121.
Applications-software

a.

is used to control the operating system

b.

includes programs designed to help programmers

c.

performs a specific task for computer users

d.

all of the above

Discuss
Answer: (c).performs a specific task for computer users
Q122.
At any given time Parallel Virtual Machine (PVM) has ……………. send buffer and …………… receive buffer.

a.

one-one

b.

one-two

c.

two-two

d.

two-one

Discuss
Answer: (b).one-two
Q123.
In the process management Round-robin method is essentially the pre-emptive version of …………

a.

FILO

b.

FIFO

c.

SSF

d.

Longest time first

Discuss
Answer: (b).FIFO
Q124.
A page fault

a.

is an error specific page.

b.

is an access to the page not currently in memory.

c.

occur when a page program occur in a page memory.

d.

page used in the previous page reference.

Discuss
Answer: (b).is an access to the page not currently in memory.
Q125.
A semaphore count of negative n means (s = –n) that the queue contains ………….. waiting processes.

a.

n + 1

b.

n

c.

n – 1

d.

0

Discuss
Answer: (b).n
Q126.
A program is located in the smallest available hole in the memory is ……………

a.

best – fit

b.

first – bit

c.

worst – fit

d.

buddy

Discuss
Answer: (a).best – fit
Q127.
With a four programs in memory and with 80% average I/O wait, the CPU utilization is?

a.

60%

b.

70%

c.

90%

d.

100%

Discuss
Answer: (a).60%
Q128.
Assume N segments in memory and a page size of P bytes. The wastage on account of internal fragmentation is:

a.

NP/2 bytes

b.

P/2 bytes

c.

N/2 bytes

d.

NP bytes

Discuss
Answer: (a).NP/2 bytes
Q129.
Suppose it takes 100 ns to access a page table and 20 ns to access associative memory with a 90% hit rate, the average access time equals:

a.

20 ns

b.

28 ns

c.

90 ns

d.

100 ns

Discuss
Answer: (b).28 ns
Q130.
Variable partition memory management technique with compaction results in:

a.

Reduction of fragmentation

b.

Minimal wastage

c.

Segment sharing

d.

None of the above

Discuss
Answer: (a).Reduction of fragmentation
Page 13 of 21

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