Nielsen interview questions

3 SQL questions, 1 python question on user click rate session start end time..A user session is a period of uninterrupted activity. something like this Calculate each user's average session time, where a session is defined as the time difference between a page_load and a page_exit.

Overall good experience. The interview was mainly resume and project-driven. One coding question was asked which was based on hashmap. Towards the end, I was asked core CS questions from Operating System, Computer Networks and DBMS.