What is abstraction in Oops ABAP?
Data encapsulation led to the important OOP concept of data hiding. Encapsulation is a mechanism of bundling the data and the functions that use them, and data abstraction is a mechanism of exposing only the interfaces and hiding the implementation details from the user.
What is inheritance in OO ABAP?
Inheritance. The concept of inheritance allows you to derive new classes from existing classes. To do this, you use the INHERITING FROM addition of the CLASS DEFINITION. The new class adopts or inherits all components of the existing class.
What is method overloading in SAP ABAP?
Methods overloading Methods overloading is creating different methods with same name but with different parameters. Method Overriding Method overriding is creating a method in the derived class that has the same name arguments as in the superclass. This new method hides the superclass method.
What is polymorphism in OO ABAP?
ABAP polymorphism means that a call to a method will cause a different method to be executed depending on the type of object that invokes the method.
What’s the difference between polymorphism and inheritance?
Inheritance is one in which a new class is created (derived class) that inherits the features from the already existing class(Base class). Whereas polymorphism is that which can be defined in multiple forms.
What is singleton class in SAP ABAP?
A Singleton class is a class which can have at the most one instance. A Static Class, on the other hand, contains only static methods and attributes and therefore does not require instantiation.
What is difference between Overloading and overriding?
Method overloading is a compile-time polymorphism. Method overriding is a run-time polymorphism. It helps to increase the readability of the program. It is used to grant the specific implementation of the method which is already provided by its parent class or superclass.
What is polymorphism in ABAP?
How many types of classes are there in Oops ABAP?
two types
There are two types of classes: Local classes can only be accessed by programs on the local application server. You define local classes by using the ABAP Editor. Global classes can be accessed by the programs on all the application servers. You define global classes by using a tool called Class Builder.
What is difference between overriding and overloading?
What is static class in ABAP?
A class that only contains static components and no instance components is referred to as a static class. A global static class is loaded once with its class pool into the current internal session. Like every ABAP program, it cannot be explicitly deleted from the session.
Can final method be overloaded?
Yes, overloading a final method is perfectly legitimate.
What is the use of constructor in OO ABAP?
Constructors are special methods that produce a defined initial state for objects and classes. The state of an object is determined by its instance attributes and static attributes. Content can be assigned to attributes using the addition VALUE of the statement DATA.