What is Object Oriented ABAP, What is abstraction, what is polymorphism, difference between method overloading and overriding, what are abstract classes, difference between abstract classes and interface, how do BADIs work (multi implementation and filter) - explain in terms of OO ABAP, advantage of using CDS views, OData - what are runtime artifacts and where do we write our custom code, what would happen if we wrote code inside DPC methods instead of DPC extension class methods, difference between RFC and BAPI, why do we use BAPIs, concepts of Business Object Repository, DDIC TMG events.

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Answers to questions related to SAP ABAP Development Consultant interview.

Object Oriented ABAP is a programming paradigm that uses objects to represent real-world entities.
Abstraction is the process of hiding implementation details and showing only the necessary information to the user.
Polymorphism is the ability of an object to take on many forms.
Method overloading is having multiple methods with the same name but different parameters, while method overriding is having a method in the subclass with the same name and parameters as in the superclass.
Abstract classes are classes that cannot be instantiated and are used as a base class for other classes. Interfaces are similar to abstract classes but only contain method signatures.
BADIs (Business Add-Ins) are used to enhance the functionality of SAP applications. They can have multiple implementations and can be filtered based on certain criteria.
CDS (Core Data Services) views are used to define data models in SAP HANA. They provide advantages such as improved performance and simplified data access.
OData is a protocol used to expose data as a RESTful API. Runtime artifacts are generated automatically and custom code can be written in the DPC extension class methods.
Writing code inside DPC methods instead of DPC extension class methods can cause issues with code maintenance and upgrades.
RFC (Remote Function Call) is a protocol used to call functions in a remote system, while BAPI (Business Application Programming Interface) is a set of methods to access SAP business objects.
BAPIs provide a standardized way to access SAP business objects and can be used by external systems.
Business Object Repository (BOR) is a central repository for SAP business objects. DDIC (Data Dictionary) TMG (Table Maintenance Generator) events are used to customize table maintenance screens.