Flashcards

Quick study sessions to strengthen memory and retain key concepts.

Flashcard Study

Java: DTOs and Entities

Front

Why might self-invocation fail for @Transactional methods in Spring Boot?

Spring's proxy mechanism doesn't intercept self-invocations. When a method calls another method of the same class, the call…

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Flashcard Study

Java: DTOs and Entities

Front

Why is directly exposing JPA entities in a REST API risky in production code?

It can lead to unwanted data exposure and security issues. Directly exposing entities can inadvertently reveal sensitive fields…

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Flashcard Study

Java: DTOs and Entities

Front

Why do teams use DTOs in Spring Boot in production code?

DTOs decouple API representation from the database schema. Using DTOs helps maintain a clear separation between how data…

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Flashcard Study

Java: DTOs and Entities

Front

How do DTOs support API versioning?

DTOs allow evolving API responses independently of the database. DTOs provide a way to manage API changes over…

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Flashcard Study

Java: DTOs and Entities

Front

Why avoid exposing the password field in APIs?

Exposing passwords is a major security risk. Exposing password fields in API responses can lead to severe security…

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Flashcard Study

Java: DTOs and Entities

Front

When should Prototype scope be used over Singleton in Spring?

For components that need a new instance per use. Prototype scope is suitable for beans that need a…

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Flashcard Study

Java: DTOs and Entities

Front

How do Proxy objects work in Spring AOP?

They wrap around beans to add cross-cutting functionalities. Proxy objects in Spring AOP wrap around target beans to…

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Flashcard Study

Java: DTOs and Entities

Front

How would you explain the design consequence of using DTOs in an interview?

DTOs add a layer of abstraction between the API and persistence layer. Using DTOs introduces a design layer…

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Flashcard Study

Java: DTOs and Entities

Front

Why can self-invocation fail for @Transactional methods?

Spring AOP proxies don't intercept self-invocations. In Spring, transactional behavior is applied through AOP proxies. These proxies only…

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Flashcard Study

Java: DTOs and Entities

Front

What's a common mistake with Bean scopes in Spring?

Using Singleton scope for stateful beans. Frame the concept in practical terms so you can explain it during…

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