Which command does not terminates unless we log out of the system?(a) history(b) shell(c) echo(d) loginI have been asked this question in an interview for job.My question is based upon Shell Basics in section The Shell of Unix

Which command does not terminates unless we log out of the system?(a)

1.	Which command does not terminates unless we log out of the system?(a) history(b) shell(c) echo(d) loginI have been asked this question in an interview for job.My question is based upon Shell Basics in section The Shell of Unix
Answer» Correct choice is (b) SHELL Explanation: When we log on to a UNIX system, we first see a PROMPT. This prompt remains there until we key in something. EVEN when we think the system is idling, a UNIX command is always RUNNING at the terminal. This command is known as the shell. The shell is with US all the time and doesn’t terminates unless we log out.

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