Filename extensions help identify certain files. What filename extension identifies command files? A. COM B. BAT C. EXE D. SYS E. None of the above

The correct answer is B. BAT.

A batch file is a text file that contains a series of commands to be executed by the Windows operating system. Batch files are often used to automate tasks, such as starting programs, copying files, or deleting directories.

The filename extension for a batch file is .bat. This extension tells the Windows operating system that the file is a batch file and should be executed by the command interpreter.

The other options are incorrect because they are not filename extensions for batch files.

• COM is a filename extension for executable files. Executable files are files that contain instructions that can be executed by the computer.
• EXE is another filename extension for executable files.
• SYS is a filename extension for system files. System files are files that are essential to the operation of the computer.
• None of the above is incorrect because it is not a filename extension for a batch file.