# Service Container & DI (Laravel)

> Dependency injection, service providers, binding, singletons, contextual binding, container 해결, facades

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

## 1. Laravel의 Service Container란 무엇인가요?

**답변**

Service Container는 클래스 의존성을 관리하고 dependency injection을 수행하기 위한 강력한 도구입니다. 생성자의 type-hint를 검사하여 의존성을 자동으로 해결합니다. Service Container를 사용하면 의존성의 직접 인스턴스화를 피함으로써 테스트 용이성과 결합도 감소를 개선할 수 있습니다.

## 2. 직접 인스턴스화와 비교했을 때 dependency injection의 주요 장점은 무엇인가요?

**답변**

Dependency injection은 테스트 중에 의존성을 mock이나 stub으로 쉽게 대체할 수 있게 하여 테스트 용이성을 향상시킵니다. 또한 클래스가 구체적인 의존성에 강하게 결합되는 것을 방지하여 결합도 감소를 촉진합니다. 이는 코드를 더 유지보수하기 쉽고 변경에 유연하게 만듭니다.

## 3. Laravel 컨트롤러 생성자에 의존성을 주입하는 방법은 무엇인가요?

**답변**

생성자에 의존성의 type-hint를 추가하면 Service Container가 이 의존성을 자동으로 해결합니다. Laravel은 생성자 파라미터를 검사하고 추가 구성 없이 적절한 인스턴스를 주입합니다. 이 방식은 컨트롤러에서 dependency injection을 하는 가장 간단하고 일반적인 방법입니다.

## 17개 추가 질문 이용 가능

- Service Container에서 bind()와 singleton()의 차이점은 무엇인가요?
- app()->make(UserRepository::class) 메서드는 무엇을 하나요?

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

## 기타 Laravel 면접 주제

- [PHP 기초](https://sharpskill.dev/ko/technologies/laravel/interview-questions/php-basics.md): 25개 질문, Junior
- [PHP 객체지향 기초](https://sharpskill.dev/ko/technologies/laravel/interview-questions/php-oop-essentials.md): 20개 질문, Junior
- [Composer & Autoloading](https://sharpskill.dev/ko/technologies/laravel/interview-questions/composer-autoloading.md): 18개 질문, Junior
- [Laravel 기초](https://sharpskill.dev/ko/technologies/laravel/interview-questions/laravel-fundamentals.md): 20개 질문, Junior
- [Laravel 라우팅](https://sharpskill.dev/ko/technologies/laravel/interview-questions/laravel-routing.md): 20개 질문, Junior
- [Blade Templates](https://sharpskill.dev/ko/technologies/laravel/interview-questions/blade-templates.md): 18개 질문, Junior
- [Request & Response](https://sharpskill.dev/ko/technologies/laravel/interview-questions/request-response.md): 20개 질문, Junior
- [Eloquent ORM 기초](https://sharpskill.dev/ko/technologies/laravel/interview-questions/eloquent-orm-basics.md): 22개 질문, Junior
- [Eloquent Relationships](https://sharpskill.dev/ko/technologies/laravel/interview-questions/eloquent-relationships.md): 25개 질문, Mid-Level
- [Migrations & Schema Builder](https://sharpskill.dev/ko/technologies/laravel/interview-questions/database-migrations.md): 20개 질문, Mid-Level
- [유효성 검사와 폼](https://sharpskill.dev/ko/technologies/laravel/interview-questions/validation-forms.md): 22개 질문, Mid-Level
- [인증](https://sharpskill.dev/ko/technologies/laravel/interview-questions/authentication.md): 20개 질문, Mid-Level
- [인가와 Policies](https://sharpskill.dev/ko/technologies/laravel/interview-questions/authorization-policies.md): 18개 질문, Mid-Level
- [API Resources & Authentication](https://sharpskill.dev/ko/technologies/laravel/interview-questions/api-resources-authentication.md): 26개 질문, Mid-Level
- [미들웨어](https://sharpskill.dev/ko/technologies/laravel/interview-questions/middleware.md): 18개 질문, Mid-Level
- [Queues & Jobs](https://sharpskill.dev/ko/technologies/laravel/interview-questions/queues-jobs.md): 22개 질문, Mid-Level
- [Events & Listeners](https://sharpskill.dev/ko/technologies/laravel/interview-questions/events-listeners.md): 18개 질문, Mid-Level
- [알림 및 메일](https://sharpskill.dev/ko/technologies/laravel/interview-questions/notifications-mail.md): 20개 질문, Mid-Level
- [File Storage](https://sharpskill.dev/ko/technologies/laravel/interview-questions/file-storage.md): 18개 질문, Mid-Level
- [Testing & PHPUnit](https://sharpskill.dev/ko/technologies/laravel/interview-questions/testing-phpunit.md): 24개 질문, Mid-Level
- [Caching](https://sharpskill.dev/ko/technologies/laravel/interview-questions/caching.md): 18개 질문, Mid-Level
- [Livewire & Inertia](https://sharpskill.dev/ko/technologies/laravel/interview-questions/livewire-inertia.md): 20개 질문, Mid-Level
- [Eloquent Advanced](https://sharpskill.dev/ko/technologies/laravel/interview-questions/eloquent-advanced.md): 24개 질문, Senior
- [Repository Pattern](https://sharpskill.dev/ko/technologies/laravel/interview-questions/repository-pattern.md): 20개 질문, Senior
- [Laravel 패키지](https://sharpskill.dev/ko/technologies/laravel/interview-questions/laravel-packages.md): 20개 질문, Senior
- [Performance Optimization](https://sharpskill.dev/ko/technologies/laravel/interview-questions/performance-optimization.md): 22개 질문, Senior
- [Security Best Practices](https://sharpskill.dev/ko/technologies/laravel/interview-questions/security-best-practices.md): 22개 질문, Senior
- [Laravel Octane](https://sharpskill.dev/ko/technologies/laravel/interview-questions/laravel-octane.md): 18개 질문, Senior
- [Laravel Distributed Systems](https://sharpskill.dev/ko/technologies/laravel/interview-questions/laravel-distributed-systems.md): 22개 질문, Senior
- [Observability & Monitoring](https://sharpskill.dev/ko/technologies/laravel/interview-questions/observability-monitoring.md): 20개 질문, Senior
- [Deployment & DevOps](https://sharpskill.dev/ko/technologies/laravel/interview-questions/deployment-devops.md): 20개 질문, Senior

---

Source: SharpSkill (https://sharpskill.dev), tech interview preparation for your real stack.
HTML version of this page: https://sharpskill.dev/ko/technologies/laravel/interview-questions/service-container-di