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NASpring vs Spring Boot
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COπ Spring Boot Interview Preparation β Top 30 Questions
Preparing for a Java backend interview?
These important Spring Boot interview questions will help you revise quickly and boost your confidence. π»
π Topics Covered:
β Basics of Spring Framework
β Annotations & REST APIs
β Dependency Injection
β Spring Data JPA
β Real-time scenario questions
π‘ Save this post for quick revision before your interview!
Follow π @coding.bytes1 for daily coding content on
Java β’ SQL β’ Python β’ DSA
#springboot #javadeveloper #java #coding #backenddeveloper
@coding.bytes1
208.4K
CO29 MOST ASKED SPRING BOOT ANNOTATION QUESTIONS
(Easy β Medium β Hard)
Comment "pdf" for interview precise answers to all these questions.
Stop randomly preparing. Focus level-wise π
π’ EASY (Foundation β must be perfect)
1. What is @SpringBootApplication?
2. What are the components of @SpringBootApplication?
3. What is @Component?
4. Difference between @Component, @Service, @Repository?
5. What is @Autowired?
6. What is @RestController?
7. Difference between @Controller and @RestController?
8. What is @RequestMapping?
9. What is @GetMapping / @PostMapping?
10. What is @PathVariable?
π‘ MEDIUM (Real interview level)
11. Constructor vs Field Injection β which is better?
12. What is @Qualifier?
13. What is @Primary?
14. What is @Bean and how is it different from @Component?
15. What is @Configuration?
16. What is @RequestParam vs @RequestBody?
17. What is @ResponseBody?
18. What is @Valid and how does validation work?
19. What is @ExceptionHandler?
20. What is @ControllerAdvice?
π΄ HARD (Where most people fail)
21. What is @Transactional and its propagation types?
22. What is @Entity and how mapping works internally?
23. What is @Table?
24. What is @Id and @GeneratedValue strategies?
25. What are @OneToMany and @ManyToOne mappings?
26. FetchType.LAZY vs EAGER β when to use what?
27. What is @Value vs @ConfigurationProperties?
28. What is @EnableAutoConfiguration?
29. How does Spring Boot Auto Configuration work internally?
Comment "pdf" for rest of the interview questions and precise answers to all these questions.
Save this π and revise before every interview.
#systemdesign
#engineers
#developers
#softwareengineering
#springboot
[coding, system design, springboot, genAl developers, software engineer, coders, java]
@coding_with_deepa
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JA@Primary = Default choice
@Qualifier = Exact choice β‘
#Programming #Java #SpringBoot #CodingTips #LearnProgramming
@javainterviewready
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COThis is not a coding question.
This is a REST semantics + API contract design problem.
βΈ»
1οΈβ£ What most developers think
PUT β update full object
PATCH β update partial object
Simple theory.
But internally both may call:
save()
βΈ»
2οΈβ£ What actually happens in Spring/JPA
Flow:
API β Controller β Service β repository.save()
Inside Hibernate:
β if id exists β entity is updated
β dirty checking compares fields
β only changed fields may be updated in SQL
So technically:
PUT and PATCH can behave SAME at DB level
βΈ»
3οΈβ£ Then what is the real difference?
It is NOT save()
It is API contract:
PUT
β full object replacement expected
β missing fields = overwrite risk
PATCH
β partial update allowed
β only selected fields change
Flow:
PUT β full state replacement
PATCH β partial state modification
βΈ»
4οΈβ£ Why this matters in production
PUT misuse:
β accidental field overwrite
β data loss risk
PATCH misuse:
β inconsistent partial state if not validated
So difference is:
β not Hibernate
β not save()
β but API design rule
βΈ»
π₯ Interview Ready One-Liner:
PUT and PATCH may use the same save() internally, but the real difference is API contractβPUT expects full object replacement, while PATCH allows partial state updates without overwriting entire data.
βΈ»
π Follow for more such production-level backend breakdowns
HAPPY CODING
#backend #java #springboot #api #restapi hibernate jpa microservices softwareengineering techindia codingindia indiandeveloper
@codeera.tech
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COCheck bio for the ebook or comment scenario to get into your Inbox .
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#coding #interviewquestions #backenddeveloper #interviewpreparation #springboot
@coding__lyf
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COProfiling concept in #springboot #javaprogramming #javaprogrammer #softwaredevelopment #hungrycoders
@codingwithaman
173.8K
RASpring Boot / Backend Frameworks = Engine of Backend
This is where concepts turn into real applications.
In this part, weβre learning the core layers behind backend development:
β’ Controllers
β’ Service Layer
β’ Repository Layer
β’ Dependency Injection
β’ Exception Handling
This is where your backend code actually lives.
Understand these layers, and Spring Boot architecture starts making sense.
Comment βSPRINGβ and Iβll send you the complete notes in DM π©
Follow for the Backend Mastery Series π
#backend #springboot #java #backenddeveloper #corporatelife softwareengineering coding developers systemdesign programming
@rayofani_
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CHTop 100 SpringBoot Questions
#java #springboot #softwareengineering #backenddeveloper #dsa
[backend developers, frontend developers , full stack developers, mern stack , Spring Boot , Kafka ]
@champbyarpit
6.7K
COInterviewer: What is the difference between PUT and PATCH in REST APIs? π
Most developers answer:
PUT β Full Update
PATCH β Partial Update
Thatβs the textbook definition.
But production systems work a little differently. π
In Spring Boot + JPA, both requests often end up calling the same method:
repository.save()
Flow:
Request β Controller β Service β Hibernate/JPA β Database
Inside Hibernate:
β Entity is fetched using ID
β Dirty checking detects modified fields
β Only changed columns may be updated in SQL
Which means:
At the database level, PUT and PATCH can behave very similarly.
So where is the REAL difference? π
The difference is not in Hibernate.
The difference is in the API CONTRACT.
π’ PUT
Represents full resource replacement.
Client is expected to send the complete object state.
Missing fields may overwrite existing values.
Example Risk:
If βphoneNumberβ is missing in request,
it may become NULL in database.
Used when:
β Replacing entire resource
β Maintaining complete object state
π‘ PATCH
Represents partial resource modification.
Client sends only fields that need changes.
Existing fields remain untouched.
Used when:
β Updating specific fields
β Reducing payload size
β Avoiding accidental overwrites
β Production-Level Concerns
Incorrect PUT usage:
β Accidental data loss
β Null overwrites
β Unintended state replacement
Incorrect PATCH usage:
β Invalid partial states
β Broken business validation
β Inconsistent resource data
π‘ Interview-Ready Answer:
βPUT and PATCH may internally use the same save() operation in JPA, but the actual difference lies in REST API semantics. PUT expects full resource replacement, whereas PATCH is designed for partial state modification without replacing the entire object.β
Thatβs the difference between:
Knowing frameworks β
vs
Understanding API design semantics β
#backend #java #springboot #restapi #api
[ hibernate jpa microservices softwareengineering systemdesign backenddevelopment javadeveloper coding developer programming fullstackdeveloper interviewquestions tech softwaredeveloper indiandeveloper]
@codedsoul_05
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COGit Version Control System - Distributed VCS vs Centralized VCS
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#softwareengineer #softwaredeveloper #java #systemdesign #springboot
@concepts_by_shrayansh
7.4K
ABJava Interview Series 50 | Spring Boot
Thymeleaf in Spring Boot!
A must-know concept for every spring boot interview.
π Save this for later
ππ» Share to your Java buddy
π Follow @abhishek.codelab for more interview prep
#coding #java #interview #springboot #javaprogramming
@abhishek.codelab
β¨ #Spring Boot Discovery Guide
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The massive #Spring Boot collection on Instagram features today's most engaging videos. Content from @coding_with_deepa, @rayofani_ and @navinreddyofficial and other creative producers has reached 299K posts globally. Filter and watch the freshest #Spring Boot reels instantly.
What's trending in #Spring Boot? The most watched Reels videos and viral content are featured above. Explore the gallery to discover creative storytelling, popular moments, and content that's capturing millions of views worldwide.
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FAQs About #Spring Boot
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π‘ Top performing posts average 136.3K views (2.4x above average). Moderate competition - consistent posting builds momentum.
Post consistently 3-5 times/week at times when your audience is most active
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π‘ Top performing content gets over 10K views - focus on engaging first 3 seconds
βοΈ Detailed captions with story work well - average caption length is 636 characters
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