# Room Database (Android)

> Room을 활용한 로컬 데이터베이스: Entity, DAO, Database, Relations, Migrations, TypeConverters, LiveData, Flow

- 25 면접 질문
- Mid-Level
- [면접 질문: Android](https://sharpskill.dev/ko/technologies/android/interview-questions.md)

## 1. Android에서 Room이란 무엇인가요?

**답변**

Room은 SQLite 위에 추상화 레이어를 제공하는 영속성 라이브러리입니다. 어노테이션을 사용하여 데이터베이스 접근을 간소화하고 보일러플레이트를 줄이는 코드를 생성합니다. Room은 Android Jetpack의 일부입니다.

## 2. Room의 3가지 주요 컴포넌트는 무엇인가요?

**답변**

Room의 3가지 주요 컴포넌트는 다음과 같습니다. 1) Entity(테이블을 나타냄), 2) DAO(Data Access Object, 쿼리를 포함), 3) Database(데이터베이스 설정과 DAO를 포함하는 추상 클래스).

## 3. Room에서 @Entity 어노테이션은 어떤 용도로 사용되나요?

**답변**

@Entity는 클래스를 데이터베이스 테이블로 표시합니다. 클래스의 각 필드가 컬럼이 됩니다. 기본적으로 테이블 이름은 클래스 이름이지만 tableName으로 커스터마이즈할 수 있습니다.

## 22개 추가 질문 이용 가능

- Room Entity에서 기본 키를 정의하는 방법은 무엇인가요?
- @ColumnInfo 어노테이션은 어떤 용도로 사용되나요?

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