Question

The first line in any shell script begins with a _____

(a) &

(b) !

(c) $

(d) #

I got this question in quiz.

Question is taken from Shell Programming using read Command and Command Line Arguments topic in portion Essential Shell Programming of Unix

Answer 1

Correct answer is (d) #

For explanation I would say: When the comment character (#) is placed anywhere in a line; the shell ignores all characters on its right. However, this rule doesn’t apply to the first line which is the interpreter line. It always begins with #! and followed by the pathname of the shell to be used for running the script.