In MS-DOS relocatable object files and local modules have extensions ?
In MS-DOS relocatable object files and local modules have extensions .OBJ and .COM or .EXE respectively.
The Microsoft disk operating system (MS-DOS) is an operating system developed for PCs with x86 microprocessors. It is a command-line-based system, where all commands are entered in text form and there is no graphical user interface. All executable programs in DOS use a .COM or .EXE extension. A .COM file literally consists of nothing other than binary code.
The relocatable object module format is an object file format used primarily for software intended to run on Intel microprocessors.