Google Software Developer interview questions

The reqruiter contacted me saying they wanted to employ someone with my background, and then let me prepare for 1-2 month on algorithm and data. Very basic sorting algorithms. I then prepared and joined the call. I initially thought it was going to be in English but was in Japanese (my native language). Other than conversational coding interview, the interviewer asked how to optimize it (to make it scale better, or run faster). Got the feedback saying that my understanding was all right, but my basic grammer (0-shifting and stuff) was not commendable.

4 rounds in a day, each lasts 45 mins. 3 technical, 1 behavioral. Technical ones ask one leetcode question each and then have follow-ups. The followups are usually about optimization.