Transaction management with @Transactional in Spring Boot - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the @Transactional annotation in Spring Boot?

The @Transactional annotation manages database transactions automatically. It ensures that a group of operations either all succeed or all fail, keeping data consistent.

beginner

What happens if an exception occurs inside a method annotated with @Transactional?

If a runtime exception occurs, the transaction is rolled back, undoing all changes made during that transaction to keep data safe.

intermediate

Can @Transactional be applied at both class and method levels? What is the effect?

Yes. When applied at the class level, all methods inherit the transaction settings. Method-level @Transactional overrides class-level settings for that method.

intermediate

What is the default propagation behavior of @Transactional?

The default propagation is REQUIRED, meaning the method will join an existing transaction if available or start a new one if not.

beginner

How does @Transactional improve data consistency in multi-step database operations?

It groups multiple database operations into a single transaction, so either all operations succeed or all fail together, preventing partial updates.

What does @Transactional do when a runtime exception is thrown inside the method?

A Starts a new transaction

B Commits the transaction

C Rolls back the transaction

D Ignores the exception

@Transactional rolls back the transaction on runtime exceptions to keep data consistent.

Where can you apply the @Transactional annotation?

A Only on methods

B On both classes and methods

C Only on classes

D Only on interfaces

@Transactional can be applied at both class and method levels. Method-level settings override class-level ones.

What is the default propagation behavior of @Transactional?

A REQUIRED

B MANDATORY

C REQUIRES_NEW

D SUPPORTS

The default propagation is REQUIRED, which joins an existing transaction or creates a new one if none exists.

If a checked exception occurs inside a @Transactional method, what happens by default?

A Transaction rolls back

B Transaction pauses

C Transaction restarts

D Transaction commits

By default, checked exceptions do not cause rollback unless configured explicitly.

Why is transaction management important in database operations?

A To ensure data consistency

B To speed up queries

C To reduce server load

D To encrypt data

Transaction management ensures that multiple related operations complete together, keeping data consistent.

Explain how @Transactional helps maintain data consistency in Spring Boot applications.

Think about what happens when something goes wrong during multiple database steps.

Describe the difference between applying @Transactional at the class level versus the method level.

Consider how you might want different transaction rules for different methods.