⟩ What does the following command do? who | wc -l a) List the number of users logged in b) List the users c) List the number of users in the system d) Display the content of who command
a) List the number of users logged in
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More Questions for you:
What is the output of this program?
#!/bin/sh
var="google"
san_function() {
var="Linux"
echo $var
}
san_function
exit 0
a) google
b) Linux
c) command not found
d) none of the mentionedWhat is the output of this program?
#!/bin/bash
function san_function1 {
echo "This is first function"
}
san_function2() {
echo "This is second function"
}
san_function1
san_function2
exit 0
a) This is the first function
b) This is the second function
c) This is the first function
This is the second function
d) program will generate error because first function definition is not correctWhat is the output of this program?
#!/bin/sh
san_function1() {
a=5
echo "This is the first function"
san_function2
}
san_function2() {
echo "This is the second function"
san_function3
}
san_function3() {
echo "This is the third function"
}
san_function1
exit 0
a) This is the first function
This is the second function
This is the third function
b) This is the first function
This is the third function
This is the second function
c) This is the second function
This is the first function
This is the third function
d) This is the third function
This is the first function
This is the second functionWhich one of the following statement is true about variables in shell? a) variables do not require declaration before assigning value to them b) variables are case sensitive c) to extract the contents of a variable, we have to provide the variable a preceding $ d) all of the mentioned
What is the output of this program? #!/bin/bash san_var="google" echo "$san_var" echo '$san_var' echo '"$san_var"' echo "'$san_var'" echo $san_var exit 0 a) google $san_var "$san_var" 'google' $san_var b) google google "google" 'google' google c) program will generate an error message d) program will print nothing
What is the output of this program? #!/bin/bash var1=10 $var1=20 echo $var1 exit 0 a) program will print 10 b) program will generate a warning message c) program will print 20 d) both (a) and (b)
What is the output of this program?
#!/bin/bash
var[1]=san_1
var[2]=san_2
var[3]=san_3
echo ${var[*]}
exit 0
a) san_1
b) san_2
c) san_3
d) san_1 san_2 san_3To redefine a variable, it can be removed from the list of variables by using the command a) unset b) delete c) remove d) clear
How to feed standard output of one command to standard input of another in a single shell session? a) IO redirection can be used b) Named pipes can be used c) The pipe operator provided by the shell can be used d) It can not be done
cmd > abc 2>&1 will a) Write file2 to file1 b) Write standard output and standard error to abc c) Write standard error to abc d) Write standard output to abc & standard error to monitor
