Tata Consultancy Services Software Development Engineer SDE interview questions

Round 1: The first round was a coding round. There were 6 questions—3 questions from DSA, from easy to medium level, and 3 SQL questions of medium level. Round 2: Fortunately, I was able to clear this round and was called for the interview. The interview took place on MS Teams. First, he asked for a brief introduction about me, then asked me how I would rate myself on Problem Solving on a scale of 5. Then, he asked a few questions about my technical skills. Since I had previously worked on the MERN stack, he asked me questions about React.js and Node.js. Next, he asked a few basic OOPS questions. Then, he asked me to share my screen and gave a basic DSA question. The question was “Merge two Sorted arrays”. There was an in details discussion on this question about time complexity, space complexity, different edge cases, and the logic behind my solution. Next, he asked me a few questions from the XOR operator and asked me to find the output of 1^2^2 by writing the binary form of these numbers and applying the Associative rule to them. Overall, it was a very good experience. The interviewer was very polite and well-behaved throughout the interview and the level of questions asked was from basic to medium level only the interview went for around 30 to 40 mins.

I was pretty much confident of getting selected as i had answered all of the questions correctly. I don’t have any problem in my speaking or communication skills. Still I was rejected and wondering what went wrong.