PostgreSQL Quiz — Advanced SQL, Indexes & Performance Tuning
PostgreSQL is the world's most advanced open-source relational database. Understanding its advanced query features, indexing strategies, JSONB support, and performance tuning separates expert engineers from beginners.
PostgreSQL is the database of choice for most startups and many enterprises. Backend engineers are expected to write efficient queries, design proper indexes, and diagnose slow queries.
Sample Questions
3 of 10Q1.What is the difference between a B-tree and a GIN index in PostgreSQL?
Q2.What does `EXPLAIN ANALYZE` do in PostgreSQL?
Q3.What is JSONB in PostgreSQL and when should you use it over a JSON column?
Answer all 3 questions to see your score
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Take the full 10-question quiz. Your score gets added to your developer resume as a verified skill badge — proof that you actually know PostgreSQL.
How verified skills work
Take the PostgreSQL quiz
10 adaptive questions covering real-world scenarios, not just syntax recall.
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