Spring Boot Transaction Management Concepts 2

Question 1

What happens when a @Transactional method calls another @Transactional method within the same class?

Accepted Answer

The inner transaction is ignored due to Spring proxy limitations

Answer

Spring's @Transactional uses proxy-based AOP, so self-invocations bypass the proxy and the inner method's transaction annotation is ignored.

Question 2

Which propagation behavior creates a new transaction and suspends the current one?

Accepted Answer

REQUIRES_NEW

Answer

REQUIRES_NEW always starts a new transaction and suspends any existing transaction until the new one completes.

Question 3

What is the default isolation level used by Spring's @Transactional when set to DEFAULT?

Accepted Answer

The underlying database's default isolation level

Answer

Isolation.DEFAULT defers to the default isolation level configured in the underlying database driver.

Question 4

Which exception type does NOT trigger a rollback by default in Spring's @Transactional?

Accepted Answer

IOException

Answer

By default, Spring only rolls back on unchecked exceptions (RuntimeException and Error); checked exceptions like IOException do not trigger rollback.

Question 5

What does the 'readOnly = true' attribute on @Transactional do?

Accepted Answer

Provides a hint to the database and ORM to optimize for read-only access

Answer

readOnly=true is a hint that allows the database and Hibernate to apply optimizations like skipping dirty checking, but doesn't enforce a hard write restriction.

Spring Boot Practice Test

Spring Boot Practice Test

Spring Boot Transaction Management Concepts 2