Question

What is the meaning of 'AB???.xlsx'? Can you
identify which type of extension is this?? ​

Answer 1

Explanation:

For example, the filename “XYZ.doc” has an extension of “.doc” which is a file extension associated with the document file.

Excel file extensions can be of various types. Here we will cover the most common file type:

XLS – Excel file extension

This extension is the most common and default type in the spreadsheet generated by Microsoft office. Prior to Excel 2007, the file extension was XLS. This extension refers to a file which contains all type of information including data, formats, graphics etc. The operating system recognizes the file type with the help of extension and operates this file using the Excel application.

The XLS is the default file type for Excel version 2.0 to Excel 2003.