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Interview Preparation
Modern web interfaces, browser fundamentals, React, accessibility and performance.
Practice role-specific questions with concise answers and key points.
Answer: The Document Object Model is the browser's structured representation of an HTML document. JavaScript can inspect and update this tree, allowing interfaces to respond to user actions.
Answer: Keys give React stable identities for list items so it can efficiently reconcile changes and preserve the correct component state.
Answer: Measure first with browser performance tools, then address the largest bottlenecks such as oversized assets, unnecessary JavaScript, slow data requests, rendering work and poor caching.