Is Java case sensitive?

Question

E.g. Are they both the same?

System.out.println("Hi");

system.out.println("Hi");

Answer 1

Yes, it is.

Answer 2

Yes.

Answer 3

Yes.
int a;
is different of
int A;

Answer 4

it is case-sensitive, but the IDE will help you a lot when coding, so you do not have to memorize every single character.

Answer 5

yes