Your question is Technology Choices and Rationale. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
What technologies did you use in your project and why did you choose them?
Keep your answer focused on the main stack, not a full project tour. The interviewer is checking whether you can explain the practical reason for each choice, the trade-off you accepted, and what you would choose differently if the constraints changed.
Scope your answer to one project and the core technologies only, such as language, UI framework, concurrency model, persistence, and networking.