Unix interview questions part 5
Unix interview questions part 5
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Total Questions: 20
1. UNIX allows the system administrator to use the only chown to change both owner and group.
Correct Answer is : TRUE
2. Which symbol is used to change permissions for hidden files?
Correct Answer is : .
3. Shell enables one or more arguments to be obtained from the standard output of another command. This feature is called _________
Correct Answer is : command substitution
4. Which of the following meta-character is used in command substitution?
Correct Answer is : `
5. Command substitution is enabled in single quotes also.
Correct Answer is : FALSE
6. POSIX recommends the use of ____ instead of archaic `command ` for command substitution.
Correct Answer is : $
7. Which of the following shell doesn’t support the command substitution using $ recommended by POSIX?
Correct Answer is : bourne
8. Which symbol is used for assigning a value to variables?
Correct Answer is : 0
9. Which symbol is used for evaluation of variables?
Correct Answer is : $
10. Which of the following is a correct initialization of variables to null strings?
Correct Answer is : x=, x=’ ‘, x=” “
11. A variable can be removed using _____
Correct Answer is : unset
12. readonly command is used to protect a variable from reassignment.
Correct Answer is : TRUE
13. The variable assignment as x = 10 (whitespace on both sides of =) will work if we are not using C shell?
Correct Answer is : FALSE
14. What will the result when we evaluate this statement? $ directory=’pwd’=`pwd`
Correct Answer is : output of pwd command along with string pwd=
15. Which of the following is not a system defined variable?
Correct Answer is : $cd
16. Which of the following is an invalid variable?
Correct Answer is : -txtfile
17. Command substitution requires the command to use ________
Correct Answer is : standard output
18. The command is valid. $ ls -lRa $HOME > home.ls
Correct Answer is : TRUE
19. What are Commands?
Correct Answer is : specific instructions for performing a particular task
20. In how many categories, commands of UNIX operating system classified?
Correct Answer is : 2
