How can we escape to the UNIX shell without quitting vi editor?

A) using ctrl-D

B) using ctrl-Z

C) using ‘:sh’ command and using ctrl-Z

D) using ‘:sh’ command

Correct Answer : using ‘:sh’ command and using ctrl-Z

Explanation : We can escape to the shell without quitting the editor using ‘:sh’ command or ctrl-Z. Sometimes it is necessary to return to shell prompt to execute a UNIX command or compile our program. For this purpose, we use these commands.