A command that is stored in the system memory and loaded from the command.com
An internal command is a command built into the command interpreter (such as Command Prompt in Windows), allowing it to execute without needing a separate executable file. Examples include commands like COPY, DIR, and DEL. An external command, on the other hand, is a separate executable file (like .exe, .com, or .bat files) that the command interpreter can run, such as PING or FORMAT. If a command is not recognized, it may indicate that it is not an internal command or that the external command's executable file is not found in the system's PATH.
An internal command is an MS-DOS command that is stored in the system memory and loaded from the command.com or cmd.exe.
The 'ls' command is an external command (found in /bin)
to run these command presence of there own files in the disk is not nessecry. When we swich on the computer these commonds are automatically loaded is in run these are called internal command
Command Name - the command to be carried outParameter - object the command should act onSwitch - modifies the way you carry out a command represented by a forward slash (/) and a character e.g. /FExample.:C:\book>Tree /F
"time" command.
Internal ms-dos commands with syntax
North Korea and Cuba are good examples of command economies.
Internal commands are functions that are built into the command interpreter, External commands are those not included in the interpreter, and are instead invoked by calling an external binary. Whether or not a particular command is internal or external varies by system. For example, echo is an internal command in MS-DOS (it is built into COMMAND.COM), while in most Linux systems, it is an external one, provided by GNU coreutils.DOS Internal command is associated with his Shell file Command.Com.. DOS external command is saved on the disk..
examples of internal and external validity
An internal command is an MS-DOS command that is stored in the system memory and loaded from the command.com or cmd.exe.
1. Internal Command: Present in Command.com..2. External Command: Present in the disk..