Question

Which one of the following command is used to create a child shell?

(a) fork

(b) wait

(c) sh

(d) env

This question was posed to me in examination.

The origin of the question is Shell Variables topic in section Customizing the Environment & More File Attributes of Unix

Answer 1

Correct answer is (c) sh

Easy explanation: To create a child shell we can use the sh command. sh is basically the command name of Bourne shell. sh is a command language interpreter that executes commands read from a command line string. To create a child shell, simply invoke sh command without any argument.