Which rules are valid for the sub constructor?

Class super has subclass sub.

Which rules are valid for the sub constructor? Note: There are 2 correct answers to this question.
A . The method signature can be changed.
B . Import parameters can only be evaluated after calling the constructor of super.
C . The constructor of super must be called before using any components of your own instance.
D . Events of your own instance cannot be raised before the registration of a handler in super.

View Answer

Answer: BC

Explanation:

In object-oriented programming, when dealing with constructors in a class hierarchy, there are specific rules that apply to ensure proper initialization of each object in the inheritance chain. Here are the rules that are valid for the constructor of subclass sub which inherits from super:

Import parameters can only be evaluated after calling the constructor of super – This is correct. The constructor of the superclass (super) should be called before you do anything with the parameters specific to the subclass (sub), as the superclass may perform initializations that the subclass might depend on.

The constructor of super must be called before using any components of your own instance – This is correct. In many object-oriented languages, including ABAP, the superclass constructor is implicitly or explicitly called before the subclass’s constructor logic is executed. This ensures that the superclass is properly initialized before the subclass tries to use any of its components or functionality.