What language needed to be known for coding an online assignment submission software????

Answer 1

If you want to make it from scratch, the usual languages for website programming are HTML, CSS, and JavaScript will be needed.
You'll also need to program the server. The options for the server are much more open. PHP, Python, c# with ASP.net and many others will work.
You'll most-likely want an SQL database to store information about students, authentication details, and uploaded assignments so SQL should be important on the server too. MySQL is likely a good fit.
If you want a more complete learning management solution, check out Moodle. It is open source and implemented with PHP. It includes many features related to classrooms, lessons, and uploading assignments.
More details on Moodle are at:
https://moodle.org/

Answer 2

Thanks man... 😇