Unix

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

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

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

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

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

6.	Which command is used to remove a directory?
	A. rd B. rmdir C. dldir D. rdir E. None of the above

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

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

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

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