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#42Medium

Design Backend for an App to Distribute 6 Million Free Burgers in One Hour

Asked by:GoogleDeliveroo

Recommended Solutions from the Web

Mock Interview
https://interviewing.io/mocks/google-system-design-design-a-free-food-app
Another Mock Interview
https://interviewing.io/questions/design-a-free-food-app
Reddit discussion
https://www.reddit.com/r/softwarearchitecture/comments/xlztzr/interview_systems_design_question_that_i_want/

Key Details & Edge Cases You Should Know

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How is the food delivered? Email notification?

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How do you store the number of vouchers left?

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How do you ensure that the number of vouchers is reduced exactly once per user?

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How do you do this within the deadline - calculate rate of processing needed and machines needed for that.

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What if something fails, how do you handle that?

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