Unix - Study Mode

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[#576] Which of the following system call is more powerful (in waiting mechanism) than wait system call?

(A) waitp

(B) waitpid

(C) kill

(D) run

Correct Answer

(B) waitpid

[#577] vi editor has . . . . . . . . named buffers.

(A) 2

(B) 4

(C) 26

(D) 5

Correct Answer

(C) 26

[#578] . . . . . . . . option is used with a test for checking if the file exists and has the size greater than zero.

(A) -f

(B) -r

(C) -e

(D) -s

Correct Answer

(D) -s

[#579] Double quotes are more permissive than single quotes and allow the evaluation of the $ and ` itself.

(A) True

(B) False

Correct Answer

(A) True

[#580] Which one of the following is used for looping with a list?

(A) while

(B) until

(C) case

(D) for

Correct Answer

(D) for