Operating System Questions And Answers - Computer Science MCQ

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.
1. Round robin scheduling is essentially the preemptive version of ________ ?
[A] FIFO
[B] Shortest job first
[C] Shortest remaining
[D] Longest time first
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2. A page fault occurs ?
[A] when the page is not in the memory
[B] when the page is in the memory
[C] when the process enters the blocked state
[D] when the process is in the ready state
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3. Which of the following will determine your choice of systems software for your computer?
[A] Is the applications software you want to use compatible with it ?
[B] Is it expensive ?
[C] Is it compatible with your hardware ?
[D] Both 1 and 3
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4. What is a shell ?
[A] is a hardware component
[B] It is a command interpreter
[C] It is a part in compiler
[D] It is a tool in CPU scheduling
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5. Routine is not loaded until it is called. All routines are kept on disk in a relocatable load format. The main program is loaded into memory & is executed. This type of loading is called... ?
[A] Static loading
[B] Dynamic loading
[C] Dynamic linking
[D] Overlays
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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
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7. What is the memory from 1K - 640K called ?



[A] Extended Memory
[B] Normal Memory
[C] Low Memory
[D] Conventional Memory
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8. Virtual memory is ..... ?
[A] An extremely large main memory
[B] An extremely large secondary memory
[C] An illusion of extremely large main memory
[D] A type of memory used in super computers
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9. Which is not the state of the process ?
[A] Blocked
[B] Running
[C] Ready
[D] Privileged
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10. The number of processes completed per unit time is known as.... ?
[A] Output
[B] Throughput
[C] Efficiency
[D] Capacity
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Comments: (Your feedback is valuable to us)

jafar hussain 23 hours ago Reply

very informative and knowledge abale


Nagesh 3 months ago Reply

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amanuel bedelu 6 months ago Reply

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


Anil Kumar 8 months ago Reply

Very helpful for competitive exams


IZHAR WAJID 11 months ago Reply

really helpful for Educators nts preparation


Rupesh Dode 11 months ago Reply

very useful my technical example


Madhumita majumder 11 months ago Reply

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


Pankaj Pawar 1 year ago Reply

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


vijay kumar 1 year 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 8 months ago

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


Deb 1 year ago Reply

its really helpful for technical exam.thans .