When the command echo $ outputs 1, which of the following statements is true?
A) It is the process ID of the echo command.
B) It is the process ID of the current shell.
C) It is the exit value of the command executed immediately before echo.
D) It is the exit value of the echo command.

Question

Quizplus · Accepted Answer

The command `echo $?` outputs the exit status of the last executed command before `echo`. If it outputs 1, it means the previous command failed with an exit status of 1.

When the Command Echo $ Outputs 1, Which of the Following