Answer 1

full stack developer should be proficient in all of the above

and also knowing NoSQL seems quite important as it seems it becoming more and more used

[edit]
further reading about Fullstack developer definition
https://www.davisnolan.com/what-is-full-stack-definition/

https://medium.com/@asqrd/the-real-meaning-of-full-stack-developer-59472dd32c18

https://medium.com/swlh/the-full-stack-developer-is-a-myth-4e3fb9c25867