Professional Linux Bash Arithmetic Expressions Interview Preparation Guide Download PDF
Bash Arithmetic Expressions frequently Asked Questions in various Linux Bash Arithmetic Expressions job Interviews by interviewer. The set of questions here ensures that you offer a perfect answer posed to you. So get preparation for your new job hunting
50 Linux Bash Arithmetic Expressions Questions and Answers:
Table of Contents:
1 :: The 'logout' built in command is used to:
a) shutdown the computer
b) logoff of the computer
c) logout the current user
d) to exit the current shell
d) to exit the current shell
2 :: The command 'umask -S'
a) prints the current mask using symbolic notation
b) prints the current mask using octal numbers
c) sets the mask to 000
d) sets the mask to 777
a) prints the current mask using symbolic notation
3 :: The 'mapfile' command:
a) reads lines of standard input and assigns each to the element of an indexed array
b) reads lines of standard output file
c) reads lines of standard error file
d) none of the mentioned
a) reads lines of standard input and assigns each to the element of an indexed array
7 :: The command 'ulimit'
a) set a limit on specified resource for system users
b) set/show process resource limit
c) both (a) and (b)
d) none of the mentioned
c) both (a) and (b)
8 :: Which command identifies the resource of a command?
a) type
b) typeset
c) select
d) source
a) type
12 :: 'stty tostop' command will:
a) stop all jobs running in the shell
b) stop background jobs if they try to send output to the terminal
c) this is not a valid command
d) none of the mentioned
b) stop background jobs if they try to send output to the terminal
13 :: 'kill %s' command will:
a) terminate the job whose command line starts with s
b) terminate the last job
c) terminate the first job
d) none of the mentioned
a) terminate the job whose command line starts with s
14 :: Which command brings a background job into the foreground?
a) fg
b) bg
c) jobs %1
d) none of the mentioned
a) fg
Explanation:
bg command brings a foreground job into the background.
Explanation:
bg command brings a foreground job into the background.
15 :: Ctrl-Z key combination:
a) generates a SIGINT signal
b) stops the process running in the shell
c) kills the process running in the shell
d) both (a) and (c)
b) stops the process running in the shell
Explanation:
Ctrl-Z key combination generates a SIGTSTP signal and stops the process running in the shell.
Explanation:
Ctrl-Z key combination generates a SIGTSTP signal and stops the process running in the shell.
16 :: What is job number?
a) same as PID
b) a unique number, assigned to each job in shell
c) both (a) and (b)
d) none of the mentioned
b) a unique number, assigned to each job in shell
18 :: Which one of the following is not correct about job control in bash shell?
a) it is the ability to stop and resume any process running in shell at a later point
b) user employs this facility via an interactive interface supplied by the kernel's terminal driver and bash
c) it is the ability to create any process
d) none of the mentioned
a) it is the ability to stop and resume any process running in shell at a later point
19 :: Which command is used to re-execute the previous command?
a) !!
b) !cat
c) !3
d) !$
a) !!
Explanation:'!cat' will re-execute the last cat command, '!3′ will re-execute the third last command and '!$' will execute the last argument of previous command.
Explanation:'!cat' will re-execute the last cat command, '!3′ will re-execute the third last command and '!$' will execute the last argument of previous command.
20 :: Fc stands for
a) find command
b) fix command
c) both (a) and (b)
d) none of the mentioned
c) both (a) and (b)
Explanation:'fc -l' is used to list history of commands and 'fc -e' to edit them and 'history' command also provides the histroy of commands.
Explanation:'fc -l' is used to list history of commands and 'fc -e' to edit them and 'history' command also provides the histroy of commands.
25 :: After running this program, as your press 4, what will be the output of the program?
#!/bin/bash
echo "How many times you want to print 'globalguideline'"
read value
for ((i=0;i<$value;i++))
do
echo "globalguideline";
done
exit 0
a) 'globalguideline' will print 4 times
b) 'globalguideline' will print 3 times
c) 'globalguideline' will print 5 times
d) program will generate an error message
a) 'globalguideline' will print 4 times
