Top 25 Spring Data JPA Interview Questions and Answers with Real E-commerce Project 3–6 Yrs Java Dev

In this video, we cover 25 Spring Data JPA Interview Questions using a real-world E-commerce project (User, Order, Product) — so you don’t just memorize answers, you actually understand where and how they are used.

💡 If you’re preparing for Java backend interviews (3–6 years experience), this video will help you master:

JPA & Spring Data JPA basics
Entity mapping & annotations
Relationships (OneToMany, ManyToOne)
JPQL vs Native Queries
Pagination, DTOs & Projections
N+1 Problem & performance optimization
Optimistic Locking & Auditing
Real-world usage in Spring Boot

👉 Instead of theory-heavy explanations, we jump directly into a pre-built Spring Boot project and explain every concept practically.

🎯 Who is this video for?

✔ Java Developers (3–6 YOE)
✔ Backend Developers preparing for interviews
✔ Anyone struggling with Spring Data JPA concepts
✔ Developers who want real-world understanding

📂 Source Code (GitHub)

👉 https://github.com/TheDipDeveloper/spring-boot-jpa-ecommerce

🔹 Backend Developer Interview Preparation Playlist
👉 https://www.youtube.com/playlist?list=PLSca82_CRlvo9628twAjCn-jX5CI5IGFd

👉Spring data jpa interview questions for freshers: https://youtu.be/b9aghlt95d0

⏱️ Timestamps
00:00 – About the Video (What You’ll Learn)
01:26 – About Dip Developer Channel

01:50 – Q1: What is JPA & Spring Data JPA?
02:33 – Q2: Key JPA Annotations Explained
04:03 – Q3: JPA vs Hibernate Difference
04:35 – Q4: Defining Primary Key (@Id, @GeneratedValue)
04:50 – Q5: What is JpaRepository?
05:37 – Q6: CrudRepository vs JpaRepository
05:57 – Q7: Custom Queries using @Query (JPQL)
06:16 – Q8: Native SQL Queries in JPA
06:52 – Q9: JPQL vs Native SQL

07:41 – Q10: FetchType.LAZY vs EAGER
08:35 – Q11: One-to-Many Relationship Mapping
09:37 – Q12: Pagination & Sorting using Pageable
10:31 – Q13: Projections in Spring Data JPA
11:10 – Q14: DTO (Data Transfer Object) Explained
11:50 – Q15: Optimistic Locking (@Version)

12:53 – Q16: Bidirectional Relationships (mappedBy)
13:23 – Q17: N+1 Problem & Solution (JOIN FETCH)
14:50 – Q18: Cascading in JPA
15:05 – Q19: save() vs saveAndFlush()
15:40 – Q20: JPA Auditing (CreatedDate, ModifiedDate)

16:40 – Q21: Derived Query Methods
17:55 – Q22: Updating Entity in JPA
18:30 – Q23: @Modifying Annotation
18:57 – Q24: Using JPA without Spring Boot
19:40 – Q25: Role of EntityManager

20:18 – Interview Tips (Must Know)
👉 Which JPA concept do you find hardest? Comment below!
👉 Don’t forget to LIKE 👍 and SUBSCRIBE for more backend interview content 🚀

🏷️ Hashtags

#SpringBoot #SpringDataJPA #JavaInterview #BackendDevelopment #Hibernate #JPA #JavaDeveloper #CodingInterview #techinterview

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Видео Top 25 Spring Data JPA Interview Questions and Answers with Real E-commerce Project 3–6 Yrs Java Dev канала Dip Developer