Topic: Sort Customers descending by FirstName?. Expect to explain the idea in your own words, show correct syntax (PostgreSQL / MySQL / SQL Server differences if relevant), and mention edge cases (NULL, duplicates, transaction safety, indexes).
How to answer live
State the definition or write the query.
Give one concrete example.
Note a common mistake and how you would verify the result.
Итог
Key takeaway for interview: Sort Customers descending by FirstName?