How To Have A Section Fill The Entire Screen?

I was wondering how I can have different sections of a website fill the entire window.

For instance on this website by Viraj Bindra.

In his experience sections, they take up the whole window. I do not know what to call it, is there a word for it? I was also wondering how he has an assist pull so it can perfectly fill the window?

I am sorry if this question is ambiguous. If you go to his website I think it will make more sense.