21⟩ Which command runs the shell built-in command 'command' with the given argument? a) builtin b) caller c) there is no command present for this purpose d) none of the mentioned
a) builtin
Linux Bash Arithmetic Expressions
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50 Linux Bash Arithmetic Expressions Questions And Answers
22⟩ After running this program, if you enter 1000, then what will be the output of the program? #!/bin/bash echo "Please enter a number" read a if [ $a -lt 100 ]; then echo "It is less than 100"; elif [ $a -lt 1000 ]; then echo "It is less than 1000" else echo "It is greater than 1000" fi exit 0 a) It is greater than 1000 b) It is less then 1000 c) It is equal to 1000 d) none of then mentioned
a) It is greater than 1000
23⟩ What is the output of this program? #!/bin/bash echo "Which file do you want to check" read x until [ -e $x ] do echo "The file does not exist. Do you want to create? y/n" read a if [ $a = y ]; then touch $x echo "Your file has been created successfully." fi done echo "The file is present in this directory" exit 0 a) it checks the existance of your entered file in the present working directory b) it creates the file if file does not exists c) program runs untill you create the file d) all of the mentioned
d) all of the mentioned
24⟩ How can you come out of the loop in this program? #!/bin/bash read x while [ $x != "hello" ] do echo "Try to come out of the loop" read x done echo "Welcome" exit 0 a) by entering "hello" b) by entering anything except "hello" c) it is not possible d) none of the mentioned
a) by entering "hello"
25⟩ What is the output of this program? #!/bin/bash for i in 2 3 7 do echo "ggl" done exit 0 a) 'ggl' will print 3 times b) nothing will print c) program will generate an error message d) none of the mentioned
a) 'ggl' will print 3 times
26⟩ 5. After running this program, as you press 's', what will be the output of the program? #!/bin/bash echo "press 's' to print interviewquestionsanswers" read var if $var=s then echo "interviewquestionsanswers" else echo "You did not press s" fi exit 0 a) interviewquestionsanswers b) You did not press s c) program will generate an error message d) none of the mentioned
c) program will generate an error message
27⟩ After running this program, as your press 4, what will be the output of the program? #!/bin/bash echo "How many times you want to print 'globalguideline'" read value for ((i=0;i<$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
28⟩ Which command executes 'command' in place of the current process instead of creating a new process? a) exec b) command c) trap d) none of the mentioned
a) exec
29⟩ Which command generates possible completions for string according to the and write it to standard output? a) compgen b) complete c) continue d) none of the mentioned
a) compgen
30⟩ Which option of the command 'cd' use the actual filesystem path for cd.. and the value of pwd? a) -l b) -L c) -p d) -P
d) -P
31⟩ 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.
32⟩ 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.
33⟩ 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
34⟩ Which command allows to view the current jobs being handled by the shell? a) jobs b) view c) show d) none of the mentioned
a) jobs
35⟩ 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
36⟩ 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.
37⟩ 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.
38⟩ '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
39⟩ '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
40⟩ Which command terminates a running process by name of the process? a) kill b) pkill c) killall d) none of the mentioned
c) killall
