What are internal and external commands of DOS?

Answer 1

Internal DOS commands are those provided internally by cmd.exe:

BREAK, CD/CHDIR, CHCP, CLS, COPY, CTTY, DATE, DEL/ERASE, DIR, EXIT, LOADHIGH, LOCK, MD/MKDIR, PATH, PROMPT, RD/RMDIR, SET, TIME, TRUENAME, TYPE, UNLOCK, VER, VOL, VERIFY.

External commands are those provided by separate executables.

Answer 2

INTERNAL COMMANDS

1. These are those commands which are contained in command.com files of MS-DOS.
2. These are those functions that are built into the command interpreter.
3. There is no need of any external file in computer to read internal MS-DOS command.
4. These commands can be used as long as DOS is running on the system.
5. Internal commands do not vary from system to system.
6. These are ver, time, del, md, cd, copy con, cls, date, vol, ren, copy etc.

EXTERNAL COMMANDS

1. These are those commands which are not in-built in MS-DOS.
2. External commands are those which are not included in the interpreter.
3. There is a need of an internal file in the computer to read external MS-DOS command.
4. External command may vary from system to system. This means any two computers with same version of MS-DOS may have same internal commands, but may have different external commands.
5. These are tree, xcopy, diskcopy, more, print etc.

To execute the command the name of command has to be typed at the promt along with its argument such command is external command.

Answer 3

An external command in MS-DOS is one that is not built into the command interpreter (COMMAND.COM) but rather is launched by running a different program. For instance, EDIT is an external command, while ECHO is not.

Answer 4

An external command in MS-DOS is one that is not built into the command interpreter (COMMAND.COM) but rather is launched by running a different program. For instance, EDIT is an external command, while ECHO is not.

Answer 5

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Answer 6

Internal commands are commands that are built into the command shell. In other words, those commands are loaded in memory and cannot be deleted through ordinary means. External commands, in contrast, are files stored in a directory, and when called, are executed as a normal program; these commands live in the installation directory for MS-DOS (e.g. C:\DOS), and may be deleted or renamed.

Answer 7

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