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Unix

1- Which command is used to remove a directory?

A) rd

B) rmdir

C) ldir

D) rdir

2-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

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

A) S

B) s

C) r

D) C

4-Which symbol will be used with grep command to match the pattern pat at the beginning of a line?

A) ^pat

B) $pat

C) pat$

D) pat^

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

A) ls -1 -d

B) ls -1

C) ls -x

D) ls -F

6-Which command is used to sort the lines of data in a file in reverse order

A) sort

B) sh

C) st

D) sort -r

7-Which command is used to display the top of the file?

A) cat

B) head

C) more

D) grep

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

A) cat

B) cut

C) grep

D) paste

9-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

10-Which of the following is not a communication command.

A) write

B) mesg

C) mail

D) grep

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