SAP Software Development Engineer SDE interview questions

Came oncampus OA+4 rounds oa was simple :2 easy dsa questions , I finished test in 9 mins Interview: Round 1 : Good interviewer, polite. puzzle : some coins are given 11 or 14 i dont remember exactly, 1 was heavier and 2 were lighter, find all 3 types of coins in minimum comparison's. Java based oops, hash set vs hash map, SQL query with groupby, projects , dbms referential integrity , merge sort basics. Round 2: What is inheritance, explain with example. dsa: reverse level order traversal on binary tree 8 piece cake puzzle, 2 candle puzzle, another heavy coin puzzle. implement queue with stacks. round 3 : HR Why sap? want to do ms? if you dont like your project? round 4: HR tell me about yourself (non tech stuff), discussion about one of my hobby for 15 mins and family background.

There were 3 interview rounds- Technical Round 1 and Technical Round 2. Last was the HR Round. I cleared the Round 1 but wasn't selected for HR round. The questions asked were only from the skills you mention in your resume.