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Module 1 · Protect state and design clear object contracts2 locked4 lessons

Module 2 · Use the type system deliberately4 locked4 lessons

Module 3 · Pass behaviour and query collections4 locked4 lessons

Module 4 · Control execution and resource lifetime4 locked4 lessons

Module 5 · Build an asynchronous Study Report Service4 locked4 lessons

Module 1 · Protect state and design clear object contracts · Lesson 4 of 20

Interfaces and Composition

30 min readTechInterviewNotes Editorial TeamUpdated 27 Oct 2026Save

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TechInterviewNotes Editorial Team · Updated 27 Oct 2026 ·