Unix interview questions part 36
Unix interview questions part 36
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Total Questions: 20
1. Which one of the following command is used for replacing | with : globally?
Correct Answer is : sed ‘s/|/:/g’ emp.lst
2. To replace the string ‘director’ in the first five lines of file emp.lst with ‘manager’ we can use _____
Correct Answer is : sed ‘1,5s/director/manager/’ emp.lst
3. Which of the following characters are used with sed as anchoring characters?
Correct Answer is : $ and ^
4. What will be the function of the following command? $ sed ‘s/ *|/|/g’ emp.lst
Correct Answer is : compress multiple spaces
5. Basic regular expressions are divided into ______ categories.
Correct Answer is : 3
6. The interval regular expression uses the character _______
Correct Answer is : { and }
7. Which one of the following command will be used for adding two spaces before every line in emp.lst?
Correct Answer is : sed ‘s/^/ /’ emp.lst
8. Which shortcut does sed offer to replace the string Linux with Red hat Linux?
Correct Answer is : &
9. Which command will be used for selecting lines 3 to 10 from emp.lst?
Correct Answer is : sed -n ‘3,10p’ emp.lst
10. Shell provides us with an interface to the operating system.
Correct Answer is : TRUE
11. On a UNIX system, there can be ____ shells running simultaneously.
Correct Answer is : many
12. There can be multiple kernels on a single UNIX system.
Correct Answer is : FALSE
13. The prompt issued by the shell is called ______
Correct Answer is : command prompt
14. In UNIX there are ___ major types of shells.
Correct Answer is : 2
15. What is the default symbol for command prompt in Bourne shell?
Correct Answer is : $
16. What is the default symbol for command prompt in C shell?
Correct Answer is : %
17. Which one of the following command will display the name of the shell we are working on?
Correct Answer is : echo $SHELL
18. Which shell is the most common and best to use?
Correct Answer is : Bash shell
19. Which command does not terminates unless we log out of the system?
Correct Answer is : shell
20. In Shell’s interpretive cycle, the shell first scans for ____ in the entered command.
Correct Answer is : meta-characters
