SAP ABAP Interview Questions and Answers

SAP ABAP Interview Preparation

Most SAP ABAP interviews follow a fairly predictable pattern: they start with basic concept checks, move into reports, dialog programming, and enhancement questions, test your understanding of OOABAP and CDS Views, and finish with a scenario-based question to see how you'd actually debug or design a solution.

Preparing around this structure — rather than memorizing a long list of disconnected questions — tends to hold up better under follow-up questions, since interviewers often probe deeper into whichever topic you answer confidently.

Basic SAP ABAP Interview Questions

These fundamental questions are almost always asked early in an SAP ABAP interview:

• •What is SAP ABAP? — SAP ABAP (Advanced Business Application Programming) is SAP's proprietary programming language used to build custom reports, enhancements, interfaces, and data migration programs.
• •What are internal tables? — Internal tables are temporary, runtime data structures used to store and process multiple rows of data within an ABAP program.
• •What is the difference between a data type and a data object? — A data type defines the structure and properties of data, while a data object is an actual variable in memory that holds a value of that type.
• •What is a Function Module? — A Function Module is a reusable block of ABAP code with defined import, export, and exception parameters, callable from multiple programs.
• •What is a Structure in ABAP Dictionary? — A Structure is a data object made up of multiple fields of different data types, used to group related data together.
• •What is the difference between SELECT SINGLE and SELECT UP TO 1 ROWS? — SELECT SINGLE returns a single record and is optimized for it, while SELECT UP TO 1 ROWS still processes the query as a set and returns only the first row.

ABAP Dictionary Questions

ABAP Dictionary questions typically probe your understanding of data modeling inside SAP:

• •What is the difference between a Data Element and a Domain?
• •What is a Search Help, and when is it used?
• •What is a Lock Object, and why is it needed?
• •What is the difference between a Transparent Table and a Pooled Table?
• •How do you create a foreign key relationship between two tables?

Reports Development Questions

Reports questions focus on output generation and selection screen logic:

• •What is the difference between a Classical Report and an Interactive Report?
• •What are the main events in a Classical Report (INITIALIZATION, START-OF-SELECTION, etc.)?
• •How do you build an ALV Grid report using function modules?
• •What is the purpose of the AT SELECTION-SCREEN event?
• •How do you add custom sorting and filtering to an ALV report?

Dialog Programming Questions

Dialog programming questions test your understanding of screen-based custom transactions:

• •What is the difference between PBO and PAI events in module pool programming?
• •How do you validate user input on a custom screen?
• •What is a Table Control, and how is it used?
• •How do you link a custom screen to a transaction code?

Enhancement Questions

Enhancement questions test your knowledge of extending standard SAP without modifying it:

• •What is the difference between a User Exit and a Customer Exit?
• •What is a BAdI, and how does it differ from a User Exit?
• •What is the difference between Implicit and Explicit Enhancements?
• •How do you find the right enhancement spot for a given business requirement?

OOABAP Questions

Object-Oriented ABAP questions are common for both freshers and experienced candidates:

• •What is the difference between a Class and an Interface in ABAP?
• •How is inheritance implemented in ABAP OO programming?
• •What is exception handling in OOABAP, and how does TRY-CATCH work?
• •How do you build an ALV report using OOABAP classes?

CDS Views & S/4 HANA Questions

These questions test hands-on knowledge of modern, HANA-optimized development:

• •What is a CDS View, and how does it differ from a classic ABAP Dictionary view?
• •What is AMDP, and when would you use it over standard ABAP logic?
• •How is a CDS View exposed as an OData service for Fiori consumption?
• •What are annotations in CDS Views, and why are they used?

Scenario-Based SAP ABAP Questions

Scenario questions are where experienced candidates are most tested, since they simulate real project problems:

• •A custom report is running very slowly in production — walk through how you'd investigate and optimize it.
• •A standard SAP transaction needs additional custom validation — which enhancement technique would you choose, and why?
• •A BDC program is failing intermittently during data migration — how would you debug it?
• •Users report incorrect values on a Fiori app built on a custom CDS View — what would you check first?

SAP ABAP Interview Questions for Freshers

Freshers are typically tested more heavily on fundamentals and basic syntax understanding rather than deep scenario-based problems. Expect a strong focus on core concepts (internal tables, data types, ABAP Dictionary objects), basic report and dialog programming logic, and simple debugging questions rather than complex, multi-module scenarios.

Being able to explain why a concept matters — not just define it — tends to leave a stronger impression than a memorized textbook answer.

SAP ABAP Interview Questions for Experienced Candidates

Experienced candidates are questioned more on performance optimization, real project scenarios, and design decisions — for example, why a particular enhancement technique was chosen on a past project, how a specific performance issue was resolved, or how they'd approach designing a new CDS-based data model from scratch.

Interviewers at this level are often less interested in textbook definitions and more interested in how you think through ambiguous, real-world problems.