Unix

1:

Which of the following remarks about system calls, library functions and UNIX commands are true?

A.

System call is a part of kernel, while the other two are not a part of kernel

B.

Unlike library functions. system calls and Unix commands are stand-alone programs

C.

Library functions and UNIX commands use system calls

D.

Unlike system calls, library functions and UNIX commands are stand-alone programs

 

Answer : C

Explanation :

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Option: A

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