Multiple choice technology operating systems

which of the following are special systen parameters that contain information abt current processes? (select more than one answer)

  1. ?

  2. !

  3. $

  4. #

Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

In Unix shells, special parameters like $?, $!, and $$ contain information about current processes. $? holds exit status, $! holds PID of last background command, and $$ holds current shell PID. Options A, B, and C are correct, while # is a comment character, not a special parameter.