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UNIX interview questions and answers for freshers

(#M40158887) UNIX QUESTION Compiling Keep an EYE

How i am able to compile two .c file from the single command in gcc compiler ?

Asked In UNIX Hitesh Kumar Tiwari (5 years ago)

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(#M40156294) UNIX QUESTION touch command in unix Keep an EYE

Why do we use touch command in UNIX?
[1] to create an empty file
[2] to rename a file
[3] both
[4] none

Asked In UNIX Rishikesh Agrawani (6 years ago)

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(#M40156293) UNIX QUESTION sed command in unix Keep an EYE

Why do we use sed command in UNIX?
[1] for replacing any text with another text
[2] for deleting file
[3] for creating directory
[4] None of above

Asked In UNIX Rishikesh Agrawani (6 years ago)

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(#M40156193) UNIX QUESTION user password identification Keep an EYE

how can we see the password of other users in the machine as a root user?
how can we do this

Asked In UNIX vinu (6 years ago)

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(#M40155923) UNIX QUESTION UNIX command : cat Keep an EYE

The cat command in UNIX is used for

[1] displaying the contents of file
[2] concatenate two files
[3] creating a new file
[4] 1 & 3 both
[5] None

Asked In UNIX Rishikesh Agrawani (6 years ago)

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(#M40153205) UNIX QUESTION UNIX Keep an EYE

Which programming language is used in UNIX?

Asked In UNIX Lakshmi Narasaiah (6 years ago)

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(#M40153204) UNIX QUESTION UNIX Keep an EYE

Which programming language is use in UNIX?

Asked In UNIX Lakshmi Narasaiah (6 years ago)

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(#M40029571) UNIX QUESTION unix Keep an EYE

Q. How the Kernel handles both the page stealer and the fault handler?

A. The page stealer and the fault handler thrash because of the shortage of the memory. If the sum of the working sets of all processes is greater that the physical memory then the fault handler will usually sleep because it cannot allocate pages for a process. This results in the reduction of the system throughput because Kernel spends too much time in overhead, rearranging the memory in the frantic pace.

Asked In UNIX MAN (8 years ago)

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(#M40029570) UNIX QUESTION unix Keep an EYE

Q. In what way the protection fault handler concludes?

A. After finishing the execution of the fault handler, it sets the modify and protection bits and clears the copy on write bit. It recalculates the process-priority and checks for signals.

Asked In UNIX MAN (8 years ago)

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(#M40029569) UNIX QUESTION unix Keep an EYE

Q. For which kind of fault the page is checked first?

A. The page is first checked for the validity fault, as soon as it is found that the page is invalid (valid bit is clear), the validity fault handler returns immediately, and the process incur the validity page fault. Kernel handles the validity fault and the process will incur the protection fault if any one is present.

Asked In UNIX MAN (8 years ago)

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