Operating System Questions And Answers - Computer Science MCQ - Page 2

(Showing: 11 - 20 out of 94 MCQs) Operating System is the main function-able part of our computer system. The operating system multiple choice questions and answers are discussed as below along with their explanations as necessary.
11.  What is Page stealing ?
[A] It takes page frames from other working sets
[B] To increase the capacity of main memory
[C] To speed up main memory read operation
[D] None of above
12. What is convoy effect ?
[A] All process waiting for the long process to complete
[B] All process waiting for the small process to complete
[C] Process in not present in main memory
[D] None of above
13. Aging is a technique ?
[A] Used to increase the priority of processed that are waiting for long times
[B] Used to decrease the priority that are waiting for long time
[C] Used to increase the priority of processed that are currently running
[D] Used to decrease the priority processes that are currently running
14. Which of the following algorithm suffers from the Belady's anomly ?
[C] Optimal Algorithm
[D] None of above
15. Concurrent process are ?
[A] Processes that do not overlap in time
[B] Process that overlap in time
[C] Processes that are executed by the processor at the same time
[D] None of above
16. Which of the following disk scheduling strategies is likely to give the best throughput ?
[A] Farthest cylinder next
[B] Nearest Cylinder next
[D] Elevator algorithm

Size of the virtual memory depends upon ?

[A] Data Bus
[B] Address Bus
[C] Size of main memory
[D] Memory buffer register
18. Race around condition occurs when ?
[A] Two processed unknowingly wait for resources that are help by each other
[B] Two process wait for same resources
[C] All resources are shared
[D] Two processes share the same shared resource
19. The part of machine level instruction, which tells the central processor what has to be done, is
[A] Operation code
[B] address
[C] Locator
[D] Flip flop
20. Correcting errors in a program is referred to as
[A] Debugging
[B] bugging
[C] Rectifying
[D] modifying
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Nisha Ramalingam 2 years ago Reply

An operating system is

Sana Kanwal 2 years ago Reply

Great platform for learner's

Nagesh 4 years ago Reply

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amanuel bedelu 4 years ago Reply

resionable questions Thank you !!!!!!!!!!!!!!

Anil Kumar 4 years ago Reply

Very helpful for competitive exams

IZHAR WAJID 4 years ago Reply

really helpful for Educators nts preparation

Rupesh Dode 4 years ago Reply

very useful my technical example

Madhumita majumder 4 years ago Reply

Amazing..... it is very helpful to me

Pankaj Pawar 5 years ago Reply

Good one..But if you provide explaination to each answer, then it will be more advantageous.

vijay kumar 5 years ago Reply

6. In the blocked state ?
[A] the processes waiting for I/O are found
[B] the process which is running is found
[C] the processes waiting for the processor are found
[D] none of the above
Answer: A. the processes waiting for I/O are found
ans is incorrect
In some website ans C is OK

Anirudh Chauhan 4 years ago

in blocked state processes keep waiting either for resources or for I/O . So option A is correct.