Unix Questions

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11.

Which command is used to copy all files having the string chap and any two characters after that to the progs directory?

A

cp chap?? progs

B

cp chap* progs

C

cp chap[12] /progs/*.*

D

cp chap?? /progs/*

E

None of the above

Correct Answer: A

None.

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12.

Which command is used to change protection mode of files starting with the string emp and ending with 1,2, or 3?

A

chmod u+x emp[1-3]

B

chmod 777 emp*

C

chmod u+r ??? emp

D

chmod 222 emp?

E

None of the above

Correct Answer: A

None.

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13.

Which command is used to remove a directory?

A

rd

B

rmdir

C

dldir

D

rdir

E

None of the above

Correct Answer: B

None.

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14.

Which of the following keys is used to replace a single character with new text?

A

S

B

s

C

r

D

C

E

None of the above

Correct Answer: B

None.

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15.

Which command is used to extract specific columns from the file?

A

cat

B

cut

C

grep

D

paste

E

None of the above

Correct Answer: B

None.

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16.

Which command sends the word count of the file infile to the newfile.

A

wc infile >newfile

B

wc newfile

C

wc infile - newfile

D

wc infile | newfile

E

None of the above

Correct Answer: A

None.

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17.

Which command is used to remove the read permission of the file 'note' from both the group and others?

A

chmod go+r note

B

chmod go+rw note

C

chmod go-x note

D

chmod go-r note

E

None of the above

Correct Answer: D

None.

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18.

Which of the following commands is used to display the directory attributes rather than its contents?

A

ls -l -d

B

ls -l

C

ls -x

D

ls -F

E

None of the above

Correct Answer: A

None.

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19.

Which of the following files will displayed by this command cat *ch*

A

patch

B

catch

C

.ch

D

All of the above

E

None of the above

Correct Answer: D

None.

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20.

The Octal number to be given alogn with chmod command to make a file readable, writable and executable to the owner, readable and executable to group and others is:

B

755

C

744

D

555

E

None of the above

Correct Answer: B

None.

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