Zscaler Associate Software Engineer interview questions

Interview is of 4 rounds. Three technical and 1 hr. 17 student from coding round they selected. In technical round question is based on dsa and core subjects. In first technical round they ask 30 minutes only core subjects and then after that one dynamic programming question. In second round I got two medium toh hard dp question.

Campus placement. Hackerrank test followed by interviews. In hackerrank test - 2 coding questions were asked. One on tree data structure and another one on 2D matrix. 2D matrix question was matching with a question from Google Kickstart that I solved just one day back, so solved this question in first attempt. Tree question took some time but was able to solve that as well.