All 30 days
Day 9 / 30 · 2025 Edition
Testing Strategies — Part 1
The testing pyramid, unit tests, test doubles, testing ViewModels and coroutines, and what makes a test valuable.
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.