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Q.

The command that can be used to restrict incoming messages to a user is

A

mesg

B

grep

C

halt

D

sleep

E

None of the above

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MCQ

1.

Which of the following commands is used to assign executable permission to the owner of the file named "note"?

A

chmod g+x note

B

chmod u+w note

C

chmod u+x note

D

chmod ugo+x note

E

None of the above

Discussion

MCQ

2.

Which of the following special shell variables is used to process number of the current shell?

A

$!

B

$$

C

$0

D

$*

E

None of the above

Discussion

MCQ

3.

Which command will be used with vi editor to replace single character under cursor with any number of characters?

A

s

B

S

C

a

D

i

E

None of the above

Discussion

MCQ

4.

Which command is used to delete all files in the current directory as well as all files and sub-directories in its subdirectories?

A

rm *

B

rm -r *

C

rm all

D

rm *.*

E

None of the above

Discussion

MCQ

5.

Which of the following commands is used to change the working directory?

A

cd

B

changedir

C

chdir

D

cdir

E

None of the above

Discussion

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