How can I show the progress of my student while filling up the form?

2. How can I show the progress of my student while filling up the form. I want to show it on percentage or the number of questions. Is that possible?

I recommend you to use the Progress Bar widget. This widget tracks the completion status of the form. It does show the percentage and the number of fields.

Here's a demo form. Here's a guide on How-to-Add-a-Widget-to-Your-Form.