Google Software Development Engineer SDE interview questions

So the first round was online assessment Then two back to back Technical interview and the question was moderate to hard they asked me to create a scoreboard of using map and dynamic programming Then HR interview Then

3 rounds of interviews, none of them were elemination rounds. 1. DSA-45 mins, question- Tree Based 2. DSA- 45mins, question- time series based 3. DSA- 45mins, substring based i attempted all the questions, but wasnt able to communicate well. So, in every round this was my only feedback. I suggest you to keep communicating your thoughts with the interviewer, no matter what is going on in your head. Ask and they will help you to solve the question. But in my 2nd interview the interviewer was not helping me with the question, even though I asked questions.