Transaction management with @Transactional in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable transaction management on the service method.

Spring Boot

@Service
public class UserService {
    @[1]
    public void createUser(User user) {
        // method implementation
    }
}

Drag options to blanks, or click blank then click option'

AService

BAutowired

CComponent

DTransactional

Attempts:

3 left

💡 Hint

Common Mistakes

Using @Autowired instead of @Transactional

Forgetting to add @Transactional on methods that modify data

The @Transactional annotation marks the method to run within a transaction.

2fill in blank

medium

Complete the code to specify that the transaction should roll back on any exception.

Spring Boot

@Transactional(rollbackFor = [1].class)
public void updateUser(User user) {
    // update logic
}

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ARuntimeException

BThrowable

CException

DError

Attempts:

3 left

💡 Hint

Common Mistakes

Using RuntimeException only rolls back unchecked exceptions

Using Error is not recommended for rollback

Using rollbackFor = Exception.class ensures rollback on checked and unchecked exceptions.

3fill in blank

hard

Fix the error in the annotation to make the transaction read-only.

Spring Boot

@Transactional(readOnly = [1])
public List<User> getUsers() {
    // fetch users
}

Drag options to blanks, or click blank then click option'

Atrue

BTrue

C"true"

DTRUE

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around true makes it a string, causing errors

Using uppercase True or TRUE is invalid in Java

The readOnly attribute expects a boolean value true or false, not a string.

4fill in blank

hard

Fill both blanks to configure a transaction with propagation REQUIRED and isolation level SERIALIZABLE.

Spring Boot

@Transactional(propagation = Propagation.[1], isolation = Isolation.[2])
public void processOrder(Order order) {
    // processing logic
}

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AREQUIRED

BREQUIRES_NEW

CSERIALIZABLE

DREAD_COMMITTED

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing propagation types

Using lower isolation levels when strict consistency is needed

Propagation.REQUIRED means join existing or create new transaction.
Isolation.SERIALIZABLE is the strictest isolation level.

5fill in blank

hard

Fill all three blanks to create a transaction that is read-only, with timeout 30 seconds, and rollback on IllegalArgumentException.

Spring Boot

@Transactional(readOnly = [1], timeout = [2], rollbackFor = [3].class)
public void validateData(Data data) {
    // validation logic
}

Drag options to blanks, or click blank then click option'

Afalse

B30

CIllegalArgumentException

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Setting readOnly to false when method only reads data

Forgetting to specify rollbackFor for checked exceptions

Setting readOnly=true optimizes for read operations.
Timeout limits transaction duration.
Rollback on IllegalArgumentException handles specific errors.