1. The front-end is also called the user-browsable display interface or the "client", and the back-end is basically the "server-side" of the application that is not visible to the user.
2. The main job responsibilities of front-end engineers are divided into three parts, which are traditional web front-end development, mobile-end development and big data presentation-end development.
3. The main responsibilities of back-end engineers are also concentrated in three parts, namely data interaction, interface design and function realization.
4. Front-end development languages include: HTML, Css, Javascript, nodejs, etc.
5. Back-end development languages include: java, Ruby, Python, PHP, .Net, C#, go, etc.
Supplement:
Back-end development needs to be able to write SQL statements and be able to do simple database design.
Web front-end development is mainly aimed at PC-side development tasks; mobile-side development includes Android development, iOS development and various small program development.