Multiple choice technology operating systems

Shell Varialbles are ?

  1. TERM,SHELL, MAIL

  2. SHELL,MAIL,HOME

  3. WALL,HOME,SHELL

  4. HOME,SHELL,TERM,WALL
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

TERM, SHELL, and MAIL are standard Unix shell environment variables. TERM specifies the terminal type, SHELL indicates the current shell path, and MAIL points to the user's mailbox. While HOME is also a valid shell variable, option A correctly lists three legitimate shell variables. WALL is not a standard environment variable (wall is a broadcasting command).

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