The answer
Debounce: delay until activity stops (e.g., search input). Throttle: limit to once per interval (e.g., scroll handler). Practice implementing both from scratch. Know the use cases for each.
JavaScript Interview Mistakes to Avoid
How do I avoid confusing debounce and throttle in an interview?
More FAQs in JavaScript Interview Mistakes to Avoid
Memorizing without understanding, coding silently (not thinking aloud), not handling edge cases, confusing debounce and throttle, not understanding the event loop, and not knowing this binding rules.
Because interviewers often tweak the question. If you memorized a specific implementation, you cannot adapt. Understand the concept, implement from scratch, and be able to modify it. Understanding > memorization.
Study the event loop: sync code runs first, then microtasks (promises), then macrotasks (setTimeout). Practice predicting the output of mixed sync, Promise.then, and setTimeout code. Know: sync > microtasks > macrotasks.
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