Happy Rawat Javascript Interview Questions Pdf Free Upd Hot! File

Explain the concept of Hoisting.JavaScript moves declarations to the top of their scope. Functions are fully hoisted; variables are hoisted as undefined.

: Duplicates top-level values. Nested objects or arrays keep their original references. Created using ...obj or Object.assign() .

Debouncing ensures that a function will not be triggered until a specific amount of time has passed since its last invocation. It groups multiple consecutive calls into a single execution.

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The behavior of let and const between entering the scope and being declared.

When you attempt to access a property or method on an object, JavaScript first looks at the object itself. If it cannot find it, it climbs up the prototype chain until it finds the property or reaches null . javascript

Promise.all takes an iterable of promises and returns a single Promise that resolves when all of the input promises have resolved, or rejects if any input promise rejects. javascript Explain the concept of Hoisting

5. Deep Dive: Differentiate between call() , apply() , and bind() .

console.log(myVar); var myVar = 5;

These methods explicitly set the this context for a function: Nested objects or arrays keep their original references

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What is event delegation?

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When you attempt to access a property or a method on an object, JavaScript follows a specific lookup path: