What is the use of sample doc's application?

This application is usefull to download all kind of sample files with dummy data.

How to customize and download excel?

By using add row option we cn give column name with column type. Based on that we can data will get added in the downloaded sample file

Is possible to add more then 100 columns in downloaded sample excel file?

Yes, It's possible, there is no restrictions to add more columns.

Is possible to get more then 100 rows in downloaded sample excel?

No. As of now only 100 rows available in sample excel file.

What format files we get in

Excel, word, audio, video dummy files.

customize excel column format can be changable?

Yes, dummy data will get filled based on the selection like text, number, datetime etc.. in excel downloaded file.