What is the job of full stack developer??

Question

Which languages should i learn??

Answer 1

Most full stack developers specialize in a particular back end programming language, like Ruby or PHP or Python, although some.

Answer 2

To develop both front and back end applications.

Answer 3

front end : html, css, js, react vue, bootstrap scss.
backend: databases(sql/nosql), python, node.js, express

does a combination of the two