what is the uses of Internal commands & external commands in DOS | web4study

what is the uses of Internal commands & external commands in DOS



external commands

 

Internal Commands:

Internal commands are built into DOS. Once you have started the computer and loaded DOS, you can execute these internal commands any time. Internal commands are always immediately available in memory and cannot be seen in the directory. They are stored in Command.Com file.

DOS has several Internal commands such as:-

  • DIR
  • CLS
  • DATE
  • TIME
  • COPY
  • TYPE
  • RD or RMDIR
  • VER
  • REN
  • CD or CHDIR

 

External Commands:

External commands are stored separately on a disk as the program file. Any file with an extension of. BAT, .COM, or .EXE is considered as the external command. DOS must read these commands from the disk before you can execute them.

Some of frequently used external I DOS commands are:-

  • FORMAT
  • CHKDSK
  • LABEL
  • DISKCOPYPRINT
  • SYS
  • EDIT
  • XCOPY

 

 


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