Database Interview

Database interviews test your understanding of how data is stored, queried, indexed, and managed efficiently. This section covers SQL, normalization, indexes, joins, transactions, isolation levels, locking, query optimization, replication, sharding, and database performance. You’ll also learn the differences between relational and NoSQL databases and when to use each approach. The questions focus on both fundamentals and real-world scenarios that backend developers commonly face. These topics are especially useful for Java, Spring Boot, and senior backend developer interviews.