Operating System Questions And Answers - Computer Science MCQ - Page 6

(Showing: 51 - 60 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.
51. Which of the following topologies consists of multiple CPUs connected by a single communication line running the length of the network
[A] Tree
[B] Ring
[C] Bus
[D] Star
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52. Which of the following is the process by which a user's privileges ascertained ?
[A] Access Control
[B] Authorization
[C] Authentication
[D] None
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53. All of the following are examples of real security and privacy risks except
[A] Spam
[B] Hacker
[C] virus
[D] theft
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54. Security violation due to
[A] Malicious
[B] Accidental
[C] Both A and B
[D] None
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55. A public key encryption system
[A] Allows only the correct receiver to decode the data.
[B] Allows only one to decode the transmission.
[C] Allows only the correct sender to decode the data
[D] Does not encode the data before transmitting it.
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56. Which model estimates the total effort in terms of person,months of the technical project staff?
[A] COCOMO model
[B] Prototyping
[C] spiral
[D] Waterfall
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57. Bootstrap or vector is called
[A] Main program
[B] Grappling hook program
[C] Secondary program
[D] Primary storage
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58. The DIR command in DOS operating system
[A] Extracts a list of file names
[B] Copies files
[C] Erases File
[D] none
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59. 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
[E] None of the above
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60. Which of the following refers to the associative memory?
[A] the address of the data is generated by the CPU
[B] the address of the data is supplied by the users
[C] there is no need for an address i.e. the data is used as an address
[D] the data are accessed sequentially
[E] None of the above
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murugesan 1 week ago Reply

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amanuel bedelu 10 months ago Reply

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


Anil Kumar 1 year ago Reply

Very helpful for competitive exams


IZHAR WAJID 1 year ago Reply

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Rupesh Dode 1 year ago Reply

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Madhumita majumder 1 year ago Reply

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Pankaj Pawar 1 year 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.