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Dear candidates you will find MCQ questions of Operating System (OS) here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

M

Mr. Dubey • 51.17K Points
Coach

Q. 481) A character stream device transfers

(A) bytes one by one

(B) block of bytes as a unit

(C) with unpredictable response times

(D) none of the mentioned

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M

Mr. Dubey • 51.17K Points
Coach

Q. 482) A block device transfers

(A) bytes one by one

(B) block of bytes as a unit

(C) with unpredictable response times

(D) none of the mentioned

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M

Mr. Dubey • 51.17K Points
Coach

Q. 483) What is a dedicated device?

(A) opposite to a sharable device

(B) same as a sharable device

(C) can be used concurrently by several processes

(D) none of the mentioned

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M

Mr. Dubey • 51.17K Points
Coach

Q. 484) A keyboard is an example of a device that is accessed through a                      interface.

(A) block stream

(B) set of blocks

(C) character stream

(D) none of the mentioned

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M

Mr. Dubey • 51.17K Points
Coach

Q. 485) In polling

(A) busy – wait cycles wait for i/o from device

(B) interrupt handler receives interrupts

(C) interrupt-request line is triggered by i/o device

(D) all of the mentioned

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M

Mr. Dubey • 51.17K Points
Coach

Q. 486) A non blocking system call

(A) halts the execution of the application for an extended time

(B) does not halt the execution of the application

(C) does not block the interrupts

(D) none of the mentioned

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M

Mr. Dubey • 51.17K Points
Coach

Q. 487) An asynchronous call

(A) returns immediately, without waiting for the i/o to complete

(B) does not return immediately and waits for the i/o to complete

(C) consumes a lot of time

(D) is too slow

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M

Mr. Dubey • 51.17K Points
Coach

Q. 488) Buffering is done to

(A) cope with device speed mismatch

(B) cope with device transfer size mismatch

(C) maintain copy semantics

(D) all of the mentioned

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M

Mr. Dubey • 51.17K Points
Coach

Q. 489) Caching is                  spooling.

(A) same as

(B) not the same as

(C) all of the mentioned

(D) none of the mentioned

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M

Mr. Dubey • 51.17K Points
Coach

Q. 490) Caching

(A) holds a copy of the data

(B) is fast memory

(C) holds the only copy of the data

(D) holds output for a device

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