⟩ Return value of fork() system call can be a) -1,<0,0 b) -1,>0,0
b) -1,>0,0
Question and Answer:
Home Linux Operating System Management
- Share
Popular Answers:
* There is no answer to the above question yet.
More Questions for you:
What 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
The following commands gives the output like this #cat file1 file2 #cat file1 No such file or directory hello If we execute the command "cat file1 file2 1>2 2>&1" the output would be a) cat file1 No such file or directory hello b) No output is displayed c) Cat 1>2 No such file or directory d) hello
cat < file1 >> file2 | file3 a) file1 content will be appended to file2 and finally stored in file3 b) file1 content will be appended to file2 and file3 will be ignored c) file2 and file3 will have same content d) syntax error
