What is the default file extension for a file saved in Word 365?

A. .docext
B. .doc365
C. .docx
D. .doc

My answer is C.

I think so. I don't use 365, but .docx is the extension from 2011 onward.

Correct! The default file extension for a file saved in Word 365 is C. .docx.

To arrive at this answer, you could've used two methods:

1. Knowledge: If you were aware of the file extensions commonly used by Microsoft Word, you would know that the newer versions, including Word 365, save files with the .docx extension.

2. Research: If you didn't know the answer off the top of your head, a quick search in a search engine like Google would provide you with the answer. You could've searched for "default file extension for Word 365" or something similar, and the search results would've confirmed that the correct answer is C. .docx.