Unix Questions

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21.

If you are to use [Control-c] as the interrupt key instead of [Del], then you will have to use

A

tty ^c

B

stty intr ^c

C

stty echoe

D

stty echo ^a

E

None of the above

Correct Answer: B

None.

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22.

Which of the following is not a communication command.

A

write

B

mesg

C

mail

D

grep

E

None of the above

Correct Answer: D

None.

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23.

Which of the following keys is used to move the cursor to the end of the paragraph.

A

}

B

{

C

|

D

$

E

None of the above

Correct Answer: A

None.

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24.

Which command is used to concatenate all files beginning with the string 'emp' and followed by a non-numeric characters?

A

cat emp[!0-9]

B

more [emp][!0-9]

C

cat emp[x-z]

D

cat emp[a-z]

E

None of the above

Correct Answer: A

None.

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25.

The command which transcribes the standard input to the standard output and also makes a copy of the same in a file is

A

tee

B

tr

C

sort

D

grep

E

None of the above

Correct Answer: A

None.

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26.

Which command is used to remove a file?

A

remove

B

rm

C

mv

D

del

E

None of the above

Correct Answer: B

None.

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27.

The agency that sits between the user and the UNIX system is called the

A

logic

B

profile

C

shell

D

erxc

E

None of the above

Correct Answer: C

None.

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28.

Which of the following commands is used to update access and modification times of a file?

A

grep

B

wc

C

touch

D

cat

E

None of the above

Correct Answer: C

None.

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29.

Which command is used to count just the number of characters in a file?

A

wc - 1

B

wc -c

C

wc -w

D

wc -r

E

None of the above

Correct Answer: B

None.

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30.

Which of the following commands is used to list contents of directories?

A

ls

B

lp

C

dir

D

tar

E

None of the above

Correct Answer: A

None.

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