SAP Labs Interview Experience | SDE/BTP Role | OA + Technical Rounds + HR

I recently appeared for the SAP Labs interview process for a BTP/SDE role. Sharing my experience to help anyone preparing for similar roles.
📝 Round 0 — Online Assessment (OA)
The OA consisted of:

• Python: A very easy coding/problem-solving question.
• SQL: One query involving Window Functions, particularly PARTITION BY and OVER().
• AI/ML: Around 10 MCQs covering basic AI/ML concepts.
  The OA was relatively straightforward if you have your programming fundamentals, SQL and basic ML concepts clear.
  💻 Round 1 — Technical Interview
  This round focused heavily on projects + CS fundamentals + AI/GenAI concepts.
  🔹 Project Discussion
  I was asked about:
• My project and the idea behind it
• What problem I was trying to solve
• How I approached the solution
• Architecture/working of the project
• Challenges I faced and how I solved them
• Middleware and how requests flow through the application
  🔹 OOPs
  Questions included:
• Explain the 4 pillars of OOPs with examples
• What is a class vs instance/object?
• Give a real-life example of a class and its instances
• Difference between static, instance and normal members/variables
• Basic OOP concepts and their practical usage
  🔹 DSA
  Some basic DSA questions were asked:
• Explain Binary Search and its complexity
• What are Stacks and Queues?
• Real-life applications/examples of stacks and queues
  🔹 AI / ML / GenAI
  This was an important part of the interview.
  I was asked about:
• Difference between AI, ML and Deep Learning
• How does RAG work?
• How does GPT work?
• How does an LLM work?
• Types/categories of LLMs
• Difference between Generative AI and Agentic AI
• What are AI Agents?
• Difference between LangChain and LangGraph
  The interviewer was more interested in whether I could explain the concepts clearly and understand how they work, rather than just giving definitions.
  🏗️ Round 2 — Technical / System Design
  This round had a mix of project discussion, system design, puzzles and general AI discussion.
  Project
  There was another discussion around my project, including its implementation and technical decisions.
  Database Design
  I was asked to design the database tables for an e-commerce platform similar to Amazon.
  Things I considered included entities such as:
• Users
• Products
• Categories
• Orders
• Order Items
• Payments
• Addresses
• Cart
• Reviews
  The focus was on understanding relationships, primary/foreign keys and normalization.
  🧩 Puzzle
  I was also given a puzzle/problem-solving question to evaluate logical thinking.
  🤖 AI Discussion
  Some broader questions included:
• Real-life applications of AI
• Where can AI be useful?
• What are the risks/disadvantages of AI?
• How can AI impact different industries?
  👔 HR Round
  Finally, I had the HR round, which focused more on:
• Introduction
• Why SAP?
• Why this role?
• Strengths and weaknesses
• Project/team experiences
• Situational and behavioral questions
• Career goals