If the user close the form while they have answered half of the question, the answer will still record when they open the form again?

1. If the user close the form while they have answered half of the question, the answer will still record when they open the form again?

If the user will use the same device, you can enable the Autofill feature. Here's a guide: https://www.jotform.com/help/227-How-to-Enable-Auto-Fill-on-Forms

I hope this helps.