Happy Rawat Javascript Interview Questions Pdf |verified| Free Upd Jun 2026

Describe Debouncing and Throttling.Debouncing limits execution until a period of inactivity. Throttling ensures a function runs at most once in a set time. High-Frequency Coding Challenges

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Both debouncing and throttling are optimization techniques used to limit the rate at which a function is executed. They are essential for handling high-frequency events like browser window resizing, scrolling, or real-time search inputs. Debouncing

The questions are designed to help you prepare for JavaScript interviews, and the PDF may include: Describe Debouncing and Throttling

You must understand how code runs. This involves the Execution Context, which consists of the Memory Creation Phase and the Code Execution Phase.

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Handles background tasks like setTimeout , DOM events, and fetch requests.

A polyfill is a piece of code (usually JavaScript on the web) used to provide modern functionality on older browsers that do not natively support it. Writing a polyfill is a favorite interview question because it tests your understanding of prototypes, context, and edge cases.