# Networking & URLSession (iOS)

> URLSession, request HTTP, data task, upload, download, error handling, async/await

- 20 pertanyaan wawancara
- Mid-Level
- [Pertanyaan Wawancara: iOS](https://sharpskill.dev/id/technologies/ios/pertanyaan-wawancara.md)

## 1. Apa perbedaan utama antara URLSession.shared dan instance URLSession kustom?

**Jawaban**

URLSession.shared adalah singleton global dengan konfigurasi default, ideal untuk request sederhana. Instance kustom memungkinkan konfigurasi perilaku (timeout, caching, delegate) untuk kebutuhan spesifik. Menggunakan instance kustom memberikan kontrol granular atas kebijakan cache, sertifikat SSL, dan redirect.

## 2. Apa peran utama dari kelas URLRequest?

**Jawaban**

URLRequest mengenkapsulasi parameter request HTTP: URL, metode HTTP (GET, POST, dll.), header kustom, timeout, body request, dan kebijakan cache. Ini memungkinkan konfigurasi yang tepat tentang bagaimana request harus dikirim sebelum diteruskan ke URLSession.

## 3. Kapan menggunakan metode HTTP POST daripada GET dalam URLRequest?

**Jawaban**

Gunakan POST untuk mengirim data sensitif (kata sandi, token), volume data besar, atau operasi yang mengubah state server. GET cocok untuk mengambil data tanpa efek samping. POST mengenkapsulasi data dalam body request, lebih aman dan tanpa batas ukuran.

## 17 pertanyaan lagi tersedia

- Apa tujuan utama menambahkan header kustom ke URLRequest?
- Bagaimana cara membangun URL kompleks dengan beberapa parameter query menggunakan URLComponents?

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