If you can't do LeetCode while someone is breathing down your neck, then forget about it.
For database design, if you don't have the same opinion as the person who interviews you, then forget about it. No independent thought is wanted or required.
LeetCode: Problems you'll never see in real data engineering, but you better be able to complete them.
The following metrics were computed from 19 interview experiences for the Meta Data Engineer role in London, United Kingdom.
Meta's interview process for their Data Engineer roles in London, the United Kingdom is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Meta's Data Engineer interview process in London, United Kingdom.