Practice MySQL-specific features, storage engines, and optimization techniques
Start Practicing NowUnderstand InnoDB vs MyISAM and engine-specific features
Master query optimization, indexing, and performance tuning
Learn master-slave replication and clustering strategies
Select MySQL as your interview topic and customize the difficulty level
Answer realistic MySQL interview questions in a simulated environment
Receive detailed feedback on your answers, including areas to improve
Monitor your improvement and identify strengths and weaknesses
InnoDB and storage engines
Query optimization and EXPLAIN
Indexing strategies and types
Transactions and locking
Replication and binary logs
MySQL performance tuning
A: InnoDB: default, supports transactions, ACID compliant, row-level locking, foreign keys, crash recovery. MyISAM: no transactions, table-level locking, faster for read-heavy, full-text search (before MySQL 5.6). Use InnoDB for most cases - transactions and reliability are crucial. MyISAM mostly deprecated.
A: Query cache stored SELECT query results. Cache invalidated on table write. Problems: mutex contention on multi-core systems, frequent invalidation with writes, not effective for modern workloads. Removed in MySQL 8.0. Better solutions: application-level caching (Redis), result set caching in app.
A: Asynchronous: master doesn't wait for slave acknowledgment, fastest but potential data loss. Semi-synchronous: waits for at least one slave acknowledgment, safer. Group replication: multi-master, automatic failover. Use async for read scaling, semi-sync for DR, group replication for HA.
A: Steps: 1) EXPLAIN to see execution plan, 2) Check for missing indexes, 3) Look for table scans, 4) Optimize JOINs (order matters), 5) Check LIMIT usage, 6) Review WHERE clause selectivity, 7) Consider query restructuring, 8) Use covering indexes, 9) Analyze slow query log, 10) Check table statistics are updated.
Master EXPLAIN output and how to read execution plans
Understand indexing strategies: composite indexes, covering indexes, index hints
Know the difference between CHAR and VARCHAR, and when to use each
Practice with MySQL's JSON functions for semi-structured data
Understand binary logging and point-in-time recovery
Join thousands of developers who have improved their interview skills with Vibe Interviews
Start Your MySQL Interview Practice