How would you answer an interview scenario involving state and useState in React?

For an interview scenario involving state and useState, I would first clarify the business goal, scale, constraints, and the failure or quality attribute the interviewer wants to explore. State stores component data that can change over time. The useState hook returns the current value and a setter that schedules a re-render. In this scenario, for a counter updated rapidly from multiple events, use setCount(previous => previous + 1) so each update is based on the latest state rather than a captured value. For production, keep state minimal, colocate it near the components that own it, derive values during render when possible, and use functional updates when the next value depends on the previous state. I would then explain the main alternatives and tradeoffs, identify likely failure modes, and describe how I would validate the solution through testing, observability, security controls, and recovery or rollback planning.