JPA Interview Questions

Q41 What is the difference between JPQL and Criteria API? ✓ Answered → Q42 What are the different types of relationships in JPA? ✓ Answered → Q43 What is the difference between @OneToMany and @ManyToOne? ✓ Answered → Q44 What is the difference between @ManyToMany and @OneToMany? ✓ Answered → Q45 What is mappedBy in JPA relationships? ✓ Answered → Q46 What are cascading operations in JPA? ✓ Answered → Q47 What are the different cascade types available in JPA? ✓ Answered → Q48 What is orphanRemoval in JPA? ✓ Answered → Q49 What is lazy loading in JPA? ✓ Answered → Q50 What is eager loading in JPA? ✓ Answered → Q51 What is the N+1 select problem in JPA? ✓ Answered → Q52 How can you solve the N+1 query problem in JPA? ✓ Answered → Q53 What is optimistic locking in JPA? ✓ Answered → Q54 What is the purpose of the @Version annotation? ✓ Answered → Q55 What is the difference between optimistic locking and pessimistic locking? ✓ Answered → Q56 What is dirty checking in JPA? ✓ Answered → Q57 What is the difference between flush() and clear() in JPA? ✓ Answered → Q58 What is the difference between detach() and remove() in JPA? ✓ Answered → Q59 What is batch processing in JPA and how can it improve performance? ✓ Answered → Q60 What is the difference between first-level cache and second-level cache in JPA? ✓ Answered →