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Define the initial phase of a System Design interview by practicing requirement gathering and problem scoping. Learn to identify critical functional and non-functional requirements for complex systems. Practice asking clarifying questions about data load and constraints to successfully scope the design problem.

Identifying system requirements

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Identifying System Requirements

You are in a System Design interview. The interviewer presents an open-ended question, such as: “Design a video streaming service like YouTube.”

Your task is to identify:

  • Two functional requirements (what the system does) and
  • Two non-functional requirements (how the system performs).

Scoping the problem

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Scoping the Video Streaming Design Problem

After identifying requirements for a video streaming service in the previous step, your next task is to ask two clarifying questions from the interviewer to scope the problem (specifically regarding data characteristics or user load).