Spring Boot Transaction Management Concepts 5

Question 1

What is the SUPPORTS propagation behavior?

Accepted Answer

Participates in an existing transaction if one exists; runs without a transaction otherwise

Answer

SUPPORTS joins an active transaction if present but executes non-transactionally if no transaction exists, making it flexible for optional transactional context.

Question 2

Which propagation behavior ensures a method always runs WITHOUT a transaction, suspending any existing one?

Accepted Answer

NOT_SUPPORTED

Answer

NOT_SUPPORTED suspends any existing transaction and executes the method outside of any transactional context.

Question 3

What is the SERIALIZABLE isolation level's primary trade-off?

Accepted Answer

It prevents all anomalies but has the highest performance cost due to extensive locking

Answer

SERIALIZABLE prevents all read anomalies (dirty, non-repeatable, phantom) by serializing access, but severely reduces concurrency and throughput.

Question 4

How does Spring Boot enable annotation-driven transaction management automatically?

Accepted Answer

Through TransactionAutoConfiguration which applies @EnableTransactionManagement

Answer

Spring Boot's TransactionAutoConfiguration auto-applies @EnableTransactionManagement when a PlatformTransactionManager bean is detected on the classpath.

Question 5

What happens to the outer transaction if a REQUIRES_NEW inner transaction throws an unchecked exception?

Accepted Answer

The inner transaction rolls back independently; the outer transaction continues if it catches the exception

Answer

REQUIRES_NEW transactions are independent — the inner transaction rolls back on its own, and the outer transaction can continue if it catches and handles the exception.

Spring Boot Practice Test

Spring Boot Practice Test

Spring Boot Transaction Management Concepts 5