Validation groups in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a validation group interface.

Spring Boot

public interface [1] {}

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

ACreateUserGroup

BUserValidator

CValidationGroup

DCheckGroup

Attempts:

3 left

💡 Hint

Common Mistakes

Defining methods inside the validation group interface

Using class instead of interface

Validation groups in Spring Boot are defined as empty interfaces. Here, 'CreateUserGroup' is a common name for a group used during user creation validation.

2fill in blank

medium

Complete the annotation to apply a validation group to a field.

Spring Boot

@NotNull(groups = [1].class)
private String username;

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

ACreateUserGroup

BUserGroup

CValidationGroup

DDefaultGroup

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting '.class' after the group name

Using the wrong group interface name

The 'groups' attribute specifies which validation group the constraint belongs to. 'CreateUserGroup.class' applies the constraint only when that group is validated.

3fill in blank

hard

Fix the error in the validation call to validate only the 'CreateUserGroup'.

Spring Boot

Set<ConstraintViolation<User>> violations = validator.validate(user, [1]);

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

ADefault.class

BCreateUserGroup.class

CUserGroup.class

DValidationGroup.class

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the default group instead of the specific group

Forgetting '.class' suffix

To validate only constraints in the 'CreateUserGroup', pass 'CreateUserGroup.class' to the validate method.

4fill in blank

hard

Fill both blanks to define two validation groups and apply them to fields.

Spring Boot

public interface [1] {}
public interface [2] {}

@NotNull(groups = CreateGroup.class)
private String name;

@NotNull(groups = UpdateGroup.class)
private String id;

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

ACreateGroup

BUpdateGroup

CUserGroup

DValidationGroup

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same group name for both interfaces

Not matching group names in annotations

Two groups 'CreateGroup' and 'UpdateGroup' are defined and used to apply validation constraints conditionally.

5fill in blank

hard

Fill all three blanks to create a map of field names to validation groups and check if a field belongs to a group.

Spring Boot

Map<String, Class<?>> fieldGroups = Map.of(
  "username", [1].class,
  "email", [2].class,
  "password", [3].class
);

boolean isUsernameInCreate = fieldGroups.get("username") == CreateGroup.class;

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

ACreateGroup

BUpdateGroup

CResetGroup

DDefaultGroup

Attempts:

3 left

💡 Hint

Common Mistakes

Using string literals instead of class references

Mixing up group names

The map associates fields with their validation groups. The check compares the group of 'username' to 'CreateGroup.class'.