Shell Command for Continuing Background Execution of Suspended Command

B

The correct answer is option B - bg.

When a command is suspended, it means that it has been stopped temporarily and moved to the background. This can happen, for example, when a user presses Ctrl+Z while a command is running. The command is not terminated, but its execution is paused, and the shell returns control to the user.

To continue background execution of a suspended command, the bg command can be used. This command resumes the execution of the last suspended command in the background.

The other options are:

A. &: This is used to run a command in the background from the outset. For example, to run the command "command" in the background, you can type "command &". This is not the correct answer because it does not resume a suspended command.

C. cont: This command is used in conjunction with the job control feature of the shell to continue the execution of a suspended job. However, this is not the correct answer because it is not a standalone command that can be used to continue background execution of a suspended command.

D. exec: This command is used to replace the current shell process with a new process specified as an argument. This is not the correct answer because it does not resume a suspended command.

E. :&: This is not a valid shell command.