Unix - Study Mode

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[#251] Which command is used for computation and string handling?

(A) expr

(B) case

(C) if

(D) read

Correct Answer

(A) expr

[#252] User’s environment mode created using su – is terminated using . . . . . . . .

(A) ctrl-v

(B) ctrl-q

(C) ctrl-d

(D) ctrl-f

Correct Answer

(C) ctrl-d

[#253] To write selected lines, . . . . . . . . is used with sed.

(A) i

(B) n

(C) w

(D) p

Correct Answer

(C) w

[#254] Which of the following is used for storing the number of positional parameters?

(A) $n

(B) $#

(C) $*

(D) $2

Correct Answer

(B) $#

[#255] The environment variables are available in . . . . . . . .

(A) *environ[ ]

(B) env[ ]

(C) env

(D) pipe

Correct Answer

(A) *environ[ ]