Every software application, including Microsoft Word, is launched by a specific executable file. Knowing the name of this file can be useful for troubleshooting or creating custom shortcuts.
The correct answer is A: Winword.exe. This is the official and historical executable file name for Microsoft Word. The "WIN" prefix signifies its origin as a program designed for the Windows operating system, a naming convention that has been maintained across many versions of Word. When you click the Word icon on your desktop or in the Start menu, it is this specific file that the operating system executes to launch the application.
The other options are common misconceptions or plausible but incorrect guesses. Word.exe (B) is a logical but inaccurate simplification; the full name includes the "WIN" prefix. Msword.exe (C) is also incorrect; while the product is known as MS Word, the executable file does not incorporate "MS" in its name. Word356.exe (D) is incorrect because "365" refers to the Microsoft 365 subscription service, not the core executable file name itself. The executable file name remains consistent regardless of the licensing model.