1. 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^
E. None of the above
Ans: Option A
2. 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
E. None of the above
Ans: Option D
3. Which command is used to display the top of the file?
A. cat
B. head
C. more
D. grep
E. None of the above
Ans: Option B
4. 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
Ans: Option A
5. 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[l-3]
B. chmod 777 emp*
C. chmod u+r ??? emp
D. chmod 222 emp?
E. None of the above
Ans: Option A
6. Which command is used to remove a directory?
A. rd
B. rmdir
C. dldir
D. rdir
E. None of the above
Ans: Option B
7. 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
Ans: Option B
8. Which command is used to extract specific columns from the file?
A. cat
B. cut
C. grep
D. paste
E. None of the above
Ans: Option B
9. Which command sends the word count of the file infile to the newfile.
A. wc infile >newfile
B. wc <infile >newfile
C. wc infile - newfile
D. wc infile | newfile
E. None of the above
Ans: Option A
10. 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, 4-x note
E. None of the above
Ans: Option D
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