I had my first phone screen interview. It was half an hour for Python coding and half an hour for SQL.

The Python coding questions were fairly easy. Just make sure to review Python's built-in data structures and their methods.

However, the SQL questions were not that easy. The schema kept changing for each question, and it was hard to do the queries in such a short time – 5 minutes for each question.

I did not get selected for the next round.

Python data structures such as sets, dictionaries, lists, and strings.

Simple SQL queries, but with a hard schema.