# Kotlin 컬렉션과 연산자 (Android)

> Kotlin 컬렉션, 함수형 연산자(map, filter, reduce), Sequence, higher-order functions, operator overloading

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

## 1. Kotlin에서 List와 MutableList의 차이점은 무엇인가요?

**답변**

List는 생성 후 컬렉션 수정을 허용하지 않는 읽기 전용 인터페이스입니다. MutableList는 List를 확장하고 add(), remove(), clear()와 같은 수정 메서드를 추가합니다. List는 구조적 불변성을 보장합니다.

## 2. Kotlin에서 불변 리스트를 어떻게 생성하나요?

**답변**

listOf()를 사용하여 불변 리스트를 생성합니다. 이 함수는 읽기 전용 List<T>를 반환합니다. 가변 리스트에는 mutableListOf() 또는 arrayListOf()를 사용합니다.

## 3. 컬렉션에서 map() 연산자는 무엇에 사용되나요?

**답변**

map()은 함수를 적용하여 컬렉션의 각 요소를 변환하고, 변환된 요소를 가진 새 리스트를 반환합니다. 예: listOf(1,2,3).map { it * 2 }는 [2,4,6]을 반환합니다.

## 17개 추가 질문 이용 가능

- filter() 연산자는 무엇에 사용되나요?
- map()과 flatMap()의 차이점은 무엇인가요?

무료로 가입하기: https://sharpskill.dev/ko/login

## 기타 Android 면접 주제

- [Android 기초](https://sharpskill.dev/ko/technologies/android/interview-questions/android-fundamentals.md): 24개 질문, Junior
- [Android UI 및 리소스](https://sharpskill.dev/ko/technologies/android/interview-questions/android-ui-and-resources.md): 30개 질문, Junior
- [Android 생명주기](https://sharpskill.dev/ko/technologies/android/interview-questions/android-lifecycle.md): 30개 질문, Junior
- [Android 내비게이션](https://sharpskill.dev/ko/technologies/android/interview-questions/android-navigation.md): 26개 질문, Junior
- [Android 데이터 관리](https://sharpskill.dev/ko/technologies/android/interview-questions/android-data-management.md): 29개 질문, Junior
- [Android 네트워킹](https://sharpskill.dev/ko/technologies/android/interview-questions/android-networking.md): 29개 질문, Junior
- [Android 테스트](https://sharpskill.dev/ko/technologies/android/interview-questions/android-testing.md): 28개 질문, Junior
- [Android Gradle](https://sharpskill.dev/ko/technologies/android/interview-questions/android-gradle.md): 26개 질문, Junior
- [Android를 위한 Kotlin 언어 기초](https://sharpskill.dev/ko/technologies/android/interview-questions/android-kotlin-language-essentials.md): 24개 질문, Junior
- [Room Database](https://sharpskill.dev/ko/technologies/android/interview-questions/android-room-database.md): 25개 질문, Mid-Level
- [백그라운드 작업](https://sharpskill.dev/ko/technologies/android/interview-questions/android-background-work.md): 18개 질문, Mid-Level
- [Jetpack Compose](https://sharpskill.dev/ko/technologies/android/interview-questions/android-compose.md): 28개 질문, Mid-Level
- [권한 및 기기 기능](https://sharpskill.dev/ko/technologies/android/interview-questions/android-permissions-and-device.md): 21개 질문, Mid-Level
- [Android용 Firebase](https://sharpskill.dev/ko/technologies/android/interview-questions/android-firebase.md): 23개 질문, Mid-Level
- [Android MVVM Architecture](https://sharpskill.dev/ko/technologies/android/interview-questions/android-mvvm-architecture.md): 18개 질문, Mid-Level
- [Android 네트워킹 고급](https://sharpskill.dev/ko/technologies/android/interview-questions/android-networking-advanced.md): 13개 질문, Mid-Level
- [Kotlin Coroutines와 Flow](https://sharpskill.dev/ko/technologies/android/interview-questions/android-kotlin-coroutines-flow.md): 20개 질문, Mid-Level
- [Android 의존성 주입](https://sharpskill.dev/ko/technologies/android/interview-questions/android-dependency-injection.md): 15개 질문, Mid-Level
- [Android MVI Architecture](https://sharpskill.dev/ko/technologies/android/interview-questions/android-mvi-architecture.md): 17개 질문, Mid-Level
- [Android Clean Architecture](https://sharpskill.dev/ko/technologies/android/interview-questions/android-clean-architecture.md): 21개 질문, Senior
- [Android Compose 고급](https://sharpskill.dev/ko/technologies/android/interview-questions/android-compose-advanced.md): 17개 질문, Senior
- [Android Performance and Monitoring](https://sharpskill.dev/ko/technologies/android/interview-questions/android-performance-monitoring.md): 13개 질문, Senior
- [Android Security and Privacy](https://sharpskill.dev/ko/technologies/android/interview-questions/android-security-privacy.md): 18개 질문, Senior
- [Android CI/CD and Release](https://sharpskill.dev/ko/technologies/android/interview-questions/android-cicd-release.md): 15개 질문, Senior
- [Android UX and Form Factors](https://sharpskill.dev/ko/technologies/android/interview-questions/android-ux-form-factors.md): 18개 질문, Senior
- [Android Testing Advanced](https://sharpskill.dev/ko/technologies/android/interview-questions/android-testing-advanced.md): 18개 질문, Senior

---

Source: SharpSkill (https://sharpskill.dev), tech interview preparation for your real stack.
HTML version of this page: https://sharpskill.dev/ko/technologies/android/interview-questions/android-kotlin-collections-operators