spreadsheet file or workbook
The File name will usually appear at the top of the excel file. It should look something like this: file name - Microsoft Excel...
The file extension of MS Excel is .xmls
You can convert an Excel file to many different formats. Just Save As and select the format you like.
yes
The default file name for all versions of Microsoft Excel is called "book1"
you press file save as and you can make your own name.
A default filename is a name given to a file if you do not choose your own. In Excel the first default filename used is Book1.xls and your file will be called this if you don't specify another one.
xlsx
Like a picture you have copied from another file
Ms excel
A workbook.