Database Interview Track

SQL vs NoSQL, indexing, transactions and query optimization.

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Topics in recommended order

1SQL Fundamentals5 questions2Transactions5 questions3Performance5 questions

Learning path

Follow the stages top to bottom. Nothing is locked — the order is simply what works.

  1. 1SQL FundamentalsRelational model, keys, joins and normalization.
  2. 2TransactionsACID, isolation levels, locking and deadlocks.
  3. 3PerformanceIndexing, slow-query diagnosis, N+1 and caching.

SQL Fundamentals

5 questions

Transactions

5 questions

Performance

5 questions