Deck 3: Unix Commands and File System Structure

Question 1

Which command changes a file's group owner

A)cgrp
B)chgrp
C)change
D)group

Answer 1

chgrp

Question 2

Which command is used to extract intermediate result in a pipeline

A)tee
B)extract
C)exec
D)none of the above

Answer 2

tee

Question 3

Which command is used to display disk consumption of a specific directory

A)du
B)ds
C)dd
D)dds

Answer 3

du

Question 4

Which command is used to perform backup in unix?

A)backup
B)cpio
C)zip
D)gzip

Question 5

Which command creates an empty file if file does not exist?

A)cat
B)touch
C)ed
D)read

Question 6

Which option of rm command is used to remove a directory with all its subdirectories

A)-b
B)-o
C)-p
D)-r

Question 7

Write the command to display the current date in the form dd/mm/yyyy.

A)date +%d/%m/%y
B)date +"%d/%m/%y"
C)date +/%d/%m/20%y
D)date +"/%d/%m/20%y"

Question 8

Which command will delete all the blank lines in file old.txt?

A)sed '/d' old.txt
B)sed '/^/d' old.txt
C)sed '/^$/d' old.txt
D)sed '/^*/d' old.txt

Question 9

The command "sed -n '/mcqmate/p' old.txt" will

A)print the lines containing the word 'mcqmate' in file old.txt
B)delete the lines containing the word 'mcqmate' in file old.txt
C)will generate an error message
D)none of the mentioned

Question 10

Which option is used by sed to specify that the following string is an instruction or set of instructions?

A)-n
B)-e
C)-f
D)-i

Question 11

When we install a new package in linux system, then

A)all the files of the packages are installed in a single directory
B)different files are installed at different locations of the file system
C)package works just after extraction, installation is not required
D)none of the mentioned

Question 12

Host specific configuration files are installed in

A)/etc directory
B)/lib directory
C)/root directory
D)/bin directory

Question 13

The directory /media is the

A)mount point for removable media
B)mount point for filesystem
C)both (a) and (b)
D)none of the mentioned

Question 14

What is /bin/sh ?

A)bourne shell
B)hard or symbolic link to the real shell command
C)bash shell
D)both (b) and (c)

Question 15

The /boot directory stores the data that is used

A)before the kernel begins executing user mode programs
B)after the kernel begins executing user mode programs
C)before the bootloader is loaded in the ram
D)none of the mentioned

Question 16

Which one of the directory does not contain binary files?

A)/bin
B)/sbin
C)/etc
D)none of the mentioned

Question 17

Kernel modules are present in

A)/lib directory
B)/root directory
C)/boot directory
D)none of the mentioned

Question 18

The directory /opt is reserved for

A)installation of add-on application software packages
B)optional booting files
C)optional user specific files
D)none of the mentioned

Question 19

The directory /srv contains

A)site-specific data which is served by the system
B)all the system files
C)all the service files provided by the specific user
D)none of the mentioned

Question 20

Any file or directory present in the ______ directory may not be reserved between the invocation of the program.

A)/var
B)/tmp
C)/etc
D)all of the mentioned

Question 21

What is a context switch?

A)kernel switches from executing one process to another.
B)process switches from kernel mode to user mode.
C)process switches from user mode to kernel mode.
D)none of the above

Question 22

Pid of init process

A)0
B)1
C)32767
D)none of the above

Question 23

How do you get parent process identification number?

A)waitpid
B)getpid()
C)getppid()
D)parentid()