What is the best languaje?

Answer 1

Depending on what you want to use. Look at it as an equal language == technology. In life, you use technology as needed (choose the best solution for a given problem).

Answer 2

Depends on what you want to do
C is basic
Java is good

Answer 3

The best language is the one you work best with. So, there isn't a single one that applies to everyone.

For instance, C++ has faster execution than Python, but Python is easier to write and lets you code a prototype quicker. This is not about what language is better, but what you want to do.