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Key Points “In interviews… keep it simple. Props… read-only… passed from parent to child. State… mutable… managed inside the component… and triggers re-render. Clear explanation… creates strong impact.” Bonus: Virtual DOM Flow “Here’s a bonus concept… interviewers love this. State changes… then a new Virtual DOM is created… Then React compares… old and new Virtual DOM… And finally… only the changed parts are updated… in the real DOM. This process… is called reconciliation.