Which of the following applies to external DOS commands? A. External commands reside in RAM until called B. External commands are stored on disk separately from COMMAND.COM C. External commands must always be used with the /e switch D. External commands can only be executed from a batch file. E. None of the above

The correct answer is: B. External commands are stored on disk separately from COMMAND.COM

External commands are stored on disk in separate files. When you type an external command, the operating system loads the command file into memory and executes the commands in the file.

A. External commands do not reside in RAM until called. They are only loaded into memory when they are needed.
C. External commands do not need to be used with the /e switch. The /e switch is used to execute a batch file.
D. External commands can be executed from a command prompt or from a batch file.

Here are some examples of external commands:

• copy – Copies files from one location to another.
• del – Deletes files.
• dir – Displays a list of files in a directory.
• md – Creates a new directory.
• ren – Renames a file or directory.
• type – Displays the contents of a file.
• xcopy – Copies files and directories, including subdirectories.

I hope this helps! Let me know if you have any other questions.