Unix OS mcq questions with answer – Set 3

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• Total Number Of Questions : 10
• Passing Marks : 7
• Each Question Carry 1 Mark, No Negative Marking.
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#1. Which command is used for saving and quitting the vi editor simultaneously?

‘:x’

‘:x’

:f

:f

:q

:q

:w

:w

#2. How can we escape to the UNIX shell without quitting vi editor?

using ‘:sh’ command and using ctrl-Z

using ‘:sh’ command and using ctrl-Z

using ‘:sh’ command

using ‘:sh’ command

using ctrl-Z

using ctrl-Z

using ctrl-D

using ctrl-D

#3. For creating and removing directories, which of the following system calls are used?

mkdir and rmdir

mkdir and rmdir

rmdir and chown

rmdir and chown

chdir and chown

chdir and chown

mkdir and chdir

mkdir and chdir

#4. Which of the following files are known as special files in Unix?

/dev/null

/dev/null

sample.txt

sample.txt

/dev/null and /dev/tty

/dev/null and /dev/tty

/dev/tty

/dev/tty

#5. In Unix, for what purpose bc command is used?

for copying files

for copying files

as a process table viewer

as a process table viewer

as an editor

as an editor

as a calculator

as a calculator

#6. Which process is immediately set up by the kernel when we log on to a Unix system?

System

System

bash

bash

shell

shell

parent

parent

#7. Which command shows some attributes of a process?

HOME

HOME

ps

ps

$$

$$

pid

pid

#8. Which of the following system call is used for creating a new process in Unix?

new

new

wait

wait

read

read

fork

fork

#9. Which Unix command is used for locating repeated and non-repeated lines?

cut

cut

paste

paste

uniq

uniq

sort

sort

#10. Which of the following command will be used for searching “director” in emp.lst?

grep “director” emp.lst

grep “director” emp.lst

grep -director emp.lst

grep -director emp.lst

grep -v “director” emp.lst

grep -v “director” emp.lst

grep “director”

grep “director”

CHECK ANSWER