Your question is Vending Machine Testing. 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).
How would you test a vending machine which accepts cash and item id and then dispenses the corresponding food item from slot. List out all categories of testing like functional, performance, security etc.
Asked in the round 3 stage. Explain how you would organize the test effort, prioritize risks, and determine whether the machine is ready for release.