Question 1

Which command is used to display and create files?

Accepted Answer

cat

Question 2

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

Accepted Answer

ls -l -d

Question 3

Which command is used to remove a file?

Accepted Answer

rm

Question 4

While working with mail command, which command is used to save mail in a separate file?

Accepted Answer

s

Question 5

The cp command uses:

Accepted Answer

neither standard input nor standard output file

Question 6

Which of the following is not a communication command.

Accepted Answer

grep

Question 7

Which command is used to display the characteristics of a process?

Accepted Answer

ps

Question 8

Which command will be used with vi editor to insert text to left of cursor?

Accepted Answer

i

Question 9

Which command is used to make all files and sub-directories in the directory (progs) executable by all users?

Accepted Answer

chmod -R a+x progs

Question 10

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

Accepted Answer

stty intr \^c

Question 11

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

Accepted Answer

}

Question 12

Which command is used to terminate a process?

Accepted Answer

kill

Question 13

Which command is used to remove a directory?

Accepted Answer

rmdir

Question 14

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

Accepted Answer

sort -r

Question 15

Which symbol is used to separate more than one command in the same command line?

Accepted Answer

;

Question 16

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

Accepted Answer

The tee command reads standard input, then writes its content to standard output and simultaneously copies it into the specified file(s) or variables.

Question 17

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

Accepted Answer

All of the above

Question 18

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

Accepted Answer

s

Question 19

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

Accepted Answer

The head command displays the first few lines at the top of a file. It can be useful when you want a quick peek at a large file, as an alternative to opening the file.

Question 20

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

Accepted Answer

chmod u+x emp[1-3]

Unix Questions