What technologies are used to create a dynamically layout form?

Question

MySQL

I want to try to create a web application, a questionnaire embedded on the site page, so that questions are loaded from the MySQL database, and appear without reloading the page and depend on previous answers. What technologies can be used to implement this? And how is this actually called?
Strongly do not kick a newbie in the web;)
To everyone who responds - many thanks!)

Answer 1

this is implemented by AJAX technology

Answer 2

JS + AJAX + Backend giving data It
's called, uh, dynamic loading, I guess.