How can you identify the format of a file?
A) Check what program opens the file
B) Check what program created the file
C) Check the file size
D) Check the file name extension

Question

Quizplus · Accepted Answer

The file name extension is the most reliable way to identify the format of a file. The extension is usually the characters that come after the period in the file name (e.g. .docx for a Microsoft Word document). Different file types will have different extensions, so checking the extension can give you a good idea of what type of file it is.

How Can You Identify the Format of a File