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Day 12 / 30 · 2025 Edition
Network Layer: Retrofit, OkHttp & Security — Part 2
TLS, certificate pinning, authentication and token refresh, caching and designing the network layer for scale.
Inside this day
Questions and detailed answers at four levels — Junior, Mid, Senior and Architect — with code samples and architect's insights.
Try answering each question out loud before you read the answer — that's the closest thing to a real interview.