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@RestController vs @Controller.
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@RequestMapping vs @GetMapping.
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Validation using @Valid.
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Pagination in Spring Boot.
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Sorting in Spring Data.
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What is Spring Data JPA?
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CrudRepository vs JpaRepository.
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Derived Query Methods.
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Lazy Loading vs Eager Loading.
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Explain N+1 Query Problem.
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What is Spring Security?
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Authentication vs Authorization.
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Role-Based Authorization.
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How do you configure CORS?
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WebClient vs RestTemplate.
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Service-to-Service Communication.
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