Anyone who recently appeared for the phone interview of Data Engineer at Facebook can guide me:

1. What questions to expect?
2. EASY & MEDIUM of Leetcode SQL will suffice? Should I also practice HARD level?
3. EASY of Leetcode Python will suffice? Should I practice MEDIUM and HARD level?
4. For SQL questions do they provide "QUERY RESULT FORMAT" as we are getting in leetcode or hackerRank?

Thanks in Advance!!!