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What is memoization in JavaScript?

Memoization is an optimization technique that stores the results of expensive function calls and returns cached results when the same inputs occur again.

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What are JavaScript Closures and how are they useful in practice?

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Explain event delegation in JavaScript and why we should use it.

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1 . What is the difference between let, const, and var?

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JB

Jeevan Bhargav

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This answer is calibrated for technical interviews. Verify benchmarks in local sandboxes before deploying.