Operating System Questions And Answers - Computer Science MCQ - Page 5

(Showing: 41 - 50 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.
41. Which of the following commands is given to reboot the Computer?
[A] Ctrl + Alt + Del
[B] Ctrl + Alt + TAB
[C] Ctrl + Shift + Del
[D] Ctrl + Alt + Shift
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42. It is not possible to have a deadlock involving only a single process. Why?
[A] This follows directly from the hold-and-wait condition
[B] This holds mutual exclusion, hold-and-wait and non-preemption
[C] Because single process not always in safe state
[D] None
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43. Dead-lock in an Operating System is
[A] Definite waiting process
[B] Desirable process
[C] Undesirable process
[D] ALL
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44. Which of the following approaches do not require knowledge of the system state?
[A] Deadlock detection
[B] Deadlock dAvoidence
[C] Deadlock Prevension
[D] None
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45. The simplest way to break a deadlock is to
[A] Kill one of the processes
[B] Roll back
[C] Preempt a resource
[D] Lock one of the processes
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46. Which of the following scheduling policy is well suited for time shared operating system?
[A] Shortest job first
[B] Round robin
[C] First com first serve
[D] Elevator
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47. The maximum amount of information that is available in one portion of the disk access arm for a removal disk pack (without further movement of the arm with multiple heads)
[A] A cylinder of data
[B] A track of data
[C] A block of data
[D] A plate of Data
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48. Memory management is
[A] Not used in modern operating system
[B] Critical for even the simplest operating systems
[C] Not used on multiprogramming systems
[D] Replaced with virtual memory on current systems
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49. A major security problem for operating system is
[A] Authentication problem
[B] Physical problem
[C] Human problem
[D] None
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50. To protect system,there are how many security levels?
[A] 1
[B] 2
[C] 3
[D] 4
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Nagesh 10 months ago Reply

thanks for I to get very knowledge


amanuel bedelu 1 year ago Reply

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


Anil Kumar 1 year ago Reply

Very helpful for competitive exams


IZHAR WAJID 1 year ago Reply

really helpful for Educators nts preparation


Rupesh Dode 1 year ago Reply

very useful my technical example


Madhumita majumder 1 year ago Reply

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


Pankaj Pawar 2 years ago Reply

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


vijay kumar 2 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 1 year ago

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


Deb 2 years ago Reply

its really helpful for technical exam.thans .


usman 2 years ago Reply

70th is D: data inconsistency, not redundancy. redundancy is unusual repetition of data.


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