Delhivery Software Engineer, Backend interview questions

There were 2 rounds. Both were technical and included questions from Data structure and Database. Some questions from puzzles were also asked. First round was quite hectic and included back to back questions from data structure, second round included Design implementation of Gmail.

It was on campus interview. There were 4 rounds in total .1 Online + 2 Technical + 1 HR . Every round is elimination round. First round was online on hackerearth and it consisted of 3 programming questions and 10 MCQ questions on DBMS and OS.One programming questions was tough and I used BIT in that and other were moderate difficult. It was around 45 min long. Second round was technical and interviewer asked me 3 programming questions and some DBMS questions. One question was on Binary Tree Traversal, second was on DP, third was to run Dijkstra algo on the graph he provided. Third round was on project discussion and interviewer asked me about recent Hackathon experience which I mentioned on resume. It was around 25 min long. Fourth round was HR round. They asked me about Family Backgrounds, Schooling, why do you want to join Delivery?etc