Hi Sagar,
Some of the frequently asked questions in ABAP OO include:
1) Difference between interface and abstract class.
Ans: In an abstract class, atleast one method is not defined where as in an interface no method is defined ie all methods have to be redefined in the class that implements the interface.
2) What is narrowing cast?
Ans: If A is an object of a super class and B is an object of the child class, then,
the statement A = B is called narrowing cast. By doing this, the super class object A can access the public n protected members that the child class inherited from it and also the redefined methods of the child class.
3) By default, what is the visibility in a class?
Ans: Unless specified, the visibility in a class is private.
4) What is CLASS_CONSTRUCTOR? When is it called?
Ans: CLASS_CONSTRUCTOR is the static constructor of a class that is used to initialize the static attributes ( CLASS-DATA) of a class. It is called before the class is instantiated.
All the best!
Reward points if helpful.
Regards,
Renuka.
Bluesky
