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
52. Which of the following is the process by which a user's privileges ascertained ?
[A] Access Control
[B] Authorization
[C] Authentication
[D] None
53. All of the following are examples of real security and privacy risks except
[A] Spam
[B] Hacker
[C] virus
[D] theft
54. Security violation due to
[A] Malicious
[B] Accidental
[C] Both A and B
[D] None
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.
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
57. Bootstrap or vector is called
[A] Main program
[B] Grappling hook program
[C] Secondary program
[D] Primary storage
58. The DIR command in DOS operating system
[A] Extracts a list of file names
[B] Copies files
[C] Erases File
[D] none
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
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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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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