Can we learn all programming language and also remember it???

Answer 1

It's good to know many languages as It gives you a wide percepiton of your task, and also, today you' ll need to work whit many of them.
But It is also necessary a great specializaton if you want to develop a project, especially when working in teams.

Answer 2

It's better to learn few languages effectively rather than jack of all.

Answer 3

Learn the patterns and the concepts. Code is just code.