System design interview question
"Design a meeting-room booking system for a large company. Employees book rooms for meetings; rooms have capacities and equipment; and the classic complaint is that rooms are booked but sit empty while people cannot find anywhere to meet. Fifty thousand employees, two thousand rooms across twenty offices."
A deliberately small-scale question where the technical difficulty is modest and the interesting content is behavioural — the system's real problem is not concurrency, it is that people book rooms they do not use. Strong candidates recognize that early and design for utilization rather than only for booking correctness.
On Practick another engineer interviews you live for 60 minutes on a question from this bank. They have the full interviewer guide beside the call: the answers to your clarifying questions, the numbers to hand out, a ladder of follow-ups and a scoring rubric. You get the model solution once the session settles. It is free: interview someone for an hour and you have earned your own.
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