Happy Rawat Javascript Interview Questions Pdf Free Upd ((new)) -

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

Created by default when your script starts executing.

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function debounce(func, delay) let timer; return function(...args) const context = this; clearTimeout(timer); timer = setTimeout(() => func.apply(context, args); , delay); ; Use code with caution. Implementation of Throttle: javascript

Copies top-level properties. Nested objects still reference the original memory addresses (e.g., using Object.assign() or the spread operator ... ). You must understand how code runs

The JavaScript engine scans the code line by line. It allocates memory space for variables and functions. Variables are initially set to undefined , while function declarations are stored in their entirety.

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However, not all asynchronous tasks are created equal. They are divided into two distinct queues:

: Returns a brand-new function with the fixed this context. It does not run immediately. 3. Asynchronous JavaScript What is the Event Loop?