Unix - Study Mode

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[#1121] To replace | with ~, which one of the following commands will be used?

(A) tr ''|'' ''~-''

(B) tr '|\' '~-' > emp.lst

(C) tr | ~ emp.lst

(D) !

Correct Answer

(B) tr '|\' '~-' > emp.lst

[#1122] The command used to remove the directory is

(A) rmdir

(B) rd

(C) remove

(D) rdir

Correct Answer

(A) rmdir

[#1123] Which one of the following key is used to switch from command mode to input mode?

(A) i

(B) :

(C) esc

Correct Answer

(A) i

[#1124] The root directory is represented by . . . . . . . .

(A) \

(B) /

(C) *

(D) $

Correct Answer

(B) /

[#1125] perl also supports use of for loop in the following manner. for($i=0
$i<3
$i++){ }

(A) True

(B) False

Correct Answer

(A) True