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Frequently Asked Operating System interview questions and answers for freshers

(#M40029489) OPERATING SYSTEM QUESTION operating system Keep an EYE

Q. What is a data register and address register?

A. Data registers - can be assigned to a variety of functions by the programmer. They can be used with
any machine instruction that performs operations on data.
Address registers - contain main memory addresses of data and instructions or they contain a portion
of the address that is used in the calculation of the complete addresses.

Asked In Operating System MAN (6 years ago)

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(#M40153633) OPERATING SYSTEM QUESTION scheduling Keep an EYE

a computer memory is composed of 16k words of 8 bits

Asked In Operating System kowsalya (4 years ago)

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(#M40029499) OPERATING SYSTEM QUESTION operating system Keep an EYE

What are the reasons for process suspension?
1) swapping
2) interactive user request
3) timing
4) parent process request

Asked In Operating System MAN (6 years ago)

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(#M40018990) OPERATING SYSTEM QUESTION Operating System Questions Keep an EYE

What is the state of the processor,
when a process is waiting for some event to occur?

Asked In Operating System (7 years ago)

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(#M40029483) OPERATING SYSTEM QUESTION operating system Keep an EYE

Q. What are residence monitors?

A. Early operating systems were called residence monitors.

Asked In Operating System MAN (6 years ago)

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(#M40029458) OPERATING SYSTEM QUESTION operating system Keep an EYE

Q. What is thrashing?

A. It is a phenomenon in virtual memory schemes when the processor spends most of its time swapping pages, rather than executing instructions. This is due to an inordinate number of page faults

Asked In Operating System MAN (6 years ago)

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(#M40152806) OPERATING SYSTEM QUESTION Keep an EYE

No. of pages are given and using LRU algorithm we have to find the number of page faults.
a) 2 b) 6 c) 5 d)7

Asked In Operating System Nakshatra Mukhopadhyay (4 years ago)

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(#M40029478) OPERATING SYSTEM QUESTION operating system Keep an EYE

Q. What is page cannibalizing?

A. Page swapping or page replacements are called page cannibalizing.

Asked In Operating System MAN (6 years ago)

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(#M40029467) OPERATING SYSTEM QUESTION operating system Keep an EYE

Q. What is a trap and trapdoor?

A. Trapdoor is a secret undocumented entry point into a program used to grant access without normal methods of access authentication. A trap is a software interrupt, usually the result of an error condition

Asked In Operating System MAN (6 years ago)

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(#M40029464) OPERATING SYSTEM QUESTION operating system Keep an EYE

Q. What is Throughput, Turnaround time, waiting time and Response time?

A. Throughput - number of processes that complete their execution per time unit Turnaround time - amount of time to execute a particular process Waiting time - amount of time a process has been waiting in the ready queue Response time - amount of time it takes from when a request was submitted until the first response is produced, not output (for time-sharing environment)

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