Unix - Study Mode

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[#471] Which symbol is used for setting the PS1 prompt to show the current event number?

(A) ^

(B) !

(C) &

(D) |

Correct Answer

(B) !

[#472] . . . . . . . . statement is used for shifting arguments left.

(A) set

(B) shift

(C) cut

(D) paste

Correct Answer

(B) shift

[#473] Which of the following commands is known as stream editor?

(A) sed

(B) grep

(C) tr

(D) none of the above

Correct Answer

(A) sed

[#474] Jobs scheduled using batch command goes to a special at queue.

(A) True

(B) False

Correct Answer

(A) True

[#475] Which one of the following is the most powerful filter?

(A) awk

(B) grep

(C) sed

(D) perl

Correct Answer

(D) perl