Does the arguments in the constructor of a subclass get duplicated in parent class?

Question

In the code below:

class A(val a: Int, val b: Int)

class B(a: Int, b: Int, val c: Int) extends A(a,b)

Are the variable a and b, or pointers to them, duplicated in memory when creating an instance of B?

Or more generally: does a B takes more memory than the memory size of A + an Int?

Answer 1

Take a look at Scala Constructor Parameters.

and

Do scala constructor parameters default to private val?

a and b in class B are not available outside the constructor of B and do not override anything in class A