Fetch types (LAZY vs EAGER) in Spring Boot - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the fetch type to lazy loading for the association.

Spring Boot

@OneToMany(fetch = FetchType.[1])
private Set<Order> orders;

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AEAGER

BIMMEDIATE

CLAZY

DDEFERRED

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing EAGER when lazy loading is intended.

LAZY fetch type delays loading the related entities until they are accessed.

2fill in blank

medium

Complete the code to set the fetch type to eager loading for the association.

Spring Boot

@ManyToOne(fetch = FetchType.[1])
private Customer customer;

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ALAZY_LOAD

BLAZY

CON_DEMAND

DEAGER

Attempts:

3 left

💡 Hint

Common Mistakes

Using LAZY when eager loading is required.

EAGER fetch type loads the related entity immediately with the main entity.

3fill in blank

hard

Fix the error in the fetch type declaration to use the correct enum value.

Spring Boot

@OneToOne(fetch = FetchType.[1])
private Profile profile;

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AEager

BLAZY

CLazy

Dlazy

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase or mixed case enum values.

FetchType enum values are uppercase: LAZY or EAGER.

4fill in blank

hard

Fill both blanks to define a OneToMany association with lazy fetch and cascade all operations.

Spring Boot

@OneToMany(fetch = FetchType.[1], cascade = CascadeType.[2])
private List<Item> items;

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ALAZY

BEAGER

CALL

DREMOVE

Attempts:

3 left

💡 Hint

Common Mistakes

Using EAGER fetch when lazy is intended.

Using REMOVE cascade instead of ALL.

LAZY fetch delays loading items; ALL cascade applies all operations.

5fill in blank

hard

Fill all three blanks to define a ManyToMany association with eager fetch, cascade persist, and mappedBy 'tags'.

Spring Boot

@ManyToMany(fetch = FetchType.[1], cascade = CascadeType.[2], mappedBy = "[3]")
private Set<Category> categories;

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ALAZY

BPERSIST

Ctags

DEAGER

Attempts:

3 left

💡 Hint

Common Mistakes

Using LAZY instead of EAGER.

Using wrong cascade type.

Incorrect mappedBy value.

EAGER fetch loads categories immediately; PERSIST cascades save operations; mappedBy links to 'tags' field.