Which of these is correct about passing an argument by call-by-value process?
a) Copy of argument is made into the formal parameter of the subroutine.
b) Reference to original argument is passed to formal parameter of the subroutine.
c) Copy of argument is made into the formal parameter of the subroutine and changes made on parameters of subroutine have effect on original argument.
d) Reference to original argument is passed to formal parameter of the subroutine and changes made on parameters of subroutine have effect on original argument.4. What is the process of defining a method in terms of itself, that is a method that calls itself?
a) Polymorphism
b) Abstraction
c) Encapsulation
d) Recursion