Data
Databases interview questions
SQL, transactions, indexing, concurrency, scaling and NoSQL.
74 questions
Questions by difficulty
- Easy
- 23
- Medium
- 26
- Hard
- 18
- Expert
- 7
Subtopics
- SQL Basics9 questions
- Joins9 questions
- GROUP BY & HAVING9 questions
- Subqueries, CTEs & Window Functions7 questions
- Transactions & ACID8 questions
- Isolation, Locking & MVCC6 questions
- Indexes & Query Plans8 questions
- Normalization & Constraints6 questions
- Replication, Sharding & Pooling6 questions
- NoSQL, Redis & MongoDB6 questions
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