PostgreSQL Interview Questions & Assessment
Assess PostgreSQL skills including advanced query techniques, JSONB, full-text search, partitioning, and performance tuning.
Why PostgreSQL Matters
PostgreSQL is the most advanced open-source database, trusted by Apple, Instagram, Spotify, and Reddit. Its reliability and feature set make it the default choice for new applications.
Sample Interview Questions
How does PostgreSQL's MVCC (Multi-Version Concurrency Control) work?
When would you use JSONB columns vs separate tables? What are the performance implications?
Explain PostgreSQL's EXPLAIN ANALYZE output. How do you identify bottlenecks?
What is table partitioning in PostgreSQL? Compare range, list, and hash partitioning.
How does PostgreSQL's full-text search work? Compare it with Elasticsearch.
How to Prepare
Know PostgreSQL-specific features: CTEs, window functions, lateral joins
Understand JSONB operations and when to use document storage
Practice with EXPLAIN ANALYZE for query optimization
Know connection pooling with PgBouncer or pgpool
Understand vacuuming, autovacuum, and dead tuple management
Related Skills
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