# Dependency Injection & Services (Symfony)

> Service container, autowiring, konfigurasi service, tags, decoration, aliases

- 24 pertanyaan wawancara
- Mid-Level
- [Pertanyaan Wawancara: Symfony](https://sharpskill.dev/id/technologies/symfony/pertanyaan-wawancara.md)

## 1. Apa peran utama service container di Symfony?

**Jawaban**

service container (atau Dependency Injection Container) bertanggung jawab untuk membuat, mengonfigurasi, dan mengelola siklus hidup semua services aplikasi. Ia memungkinkan injeksi dependency otomatis ke dalam class, mendorong loose coupling dan memudahkan unit testing.

## 2. Apa itu autowiring di Symfony?

**Jawaban**

autowiring adalah fitur yang memungkinkan container untuk secara otomatis menyelesaikan dependency sebuah service dengan menganalisis type-hint dari parameter constructor. Hal ini menghindari keharusan mengonfigurasi setiap dependency injection secara manual di file YAML atau PHP.

## 3. Apa perbedaan antara service public dan service private di Symfony?

**Jawaban**

service public dapat diambil langsung dari container melalui get(), sedangkan service private hanya dapat di-inject sebagai dependency dari services lain. Sejak Symfony 4, services bersifat private secara default untuk meningkatkan performa dan mendorong dependency injection dibandingkan akses container langsung.

## 21 pertanyaan lagi tersedia

- Bagaimana cara meng-inject sebuah service ke dalam controller Symfony menggunakan autowiring?
- Apa fungsi opsi autoconfigure dalam konfigurasi service Symfony?

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## Topik wawancara Symfony lainnya

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- [Deployment & DevOps](https://sharpskill.dev/id/technologies/symfony/pertanyaan-wawancara/deployment-devops.md): 20 pertanyaan, Senior

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