unix Interview Questions
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1. Construct pipes to execute the following jobs. [Answer]
2. Explain the following commands. [Answer]
3. What is the significance of the “tee” command? [Answer]
4. What does the command “ $who [Answer]
5. What does the command “$ls [Answer]
6. Which of the following commands is not a filter man , (b) cat , (c) pg , (d) head [Answer]
7. How is the command “$cat file2 “ different from “$cat >file2 and >> redirection operators ? [Answer]
8. Explain the steps that a shell follows while processing a command. [Answer]
9. What difference between cmp and diff commands? [Answer]
10. What is the use of ‘grep’ command? [Answer]
11. What is the difference between cat and more command? [Answer]
12. Write a command to kill the last background job? [Answer]
13. Which command is used to delete all files in the current directory and all its sub-directories? [Answer]
14. Write a command to display a file’s contents in various formats? [Answer]
15. What will the following command do? [Answer]
16. Is it possible to create new a file system in UNIX? [Answer]
17. Is it possible to restrict incoming message? [Answer]
18. What is the use of the command "ls -x chapter[1-5]" [Answer]
19. Is ‘du’ a command? If so, what is its use? [Answer]
20. Is it possible to count number char, line in a file; if so, How? [Answer]
21. Name the data structure used to maintain file identification? [Answer]
22. How many prompts are available in a UNIX system? [Answer]
23. How does the kernel differentiate device files and ordinary files? [Answer]
24. How to switch to a super user status to gain privileges? [Answer]
25. What are shell variables? [Answer]
26. What is redirection? [Answer]
27. How to terminate a process which is running and the specialty on command kill 0? [Answer]
28. What is a pipe and give an example? [Answer]
29. What is relative path and absolute path. [Answer]