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What is JSON and how is it used in JavaScript?

JSON (JavaScript Object Notation) is a lightweight data-interchange format. JavaScript provides JSON.parse() and JSON.stringify() for working with JSON data.

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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.