Practice designing a video streaming platform like Netflix. Cover video encoding, adaptive streaming, CDN, and recommendations.
This is a full mock interview round, not a written solution to read through. The AI interviewer poses the Netflix design problem, pushes back on your choices, and asks the follow-up questions a real interviewer would: how the system behaves as traffic grows, where the bottlenecks move, which consistency guarantees you are trading away, and what happens when a component fails. You get structured feedback and a score on requirement gathering, high level architecture, data modelling, scalability and communication at the end of every attempt.
Designing Netflix is a recurring question in High Level Design (HLD) rounds at Google, Amazon, Meta, Microsoft, Netflix and Uber, and at high-growth product companies hiring SDE-2 and above. Working through it out loud - repeatedly, under time pressure - is what separates candidates who know the components from candidates who can defend a design.
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