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Jan 4, 2024 · Review these common JavaScript interview questions and answers and practice your coding fundamentals with this guide to ace your next interview. COMMON JAVASCRIPT INTERVIEW QUESTIONS. What are the different data types in JavaScript? What is hoisting in JavaScript? What is the difference between null and undefined? What are closures in JavaScript?
- What is JavaScript? A high-level, interpreted programming language called JavaScript makes it possible to create interactive web pages and online apps with dynamic functionality.
- What are the different data types in JavaScript? JavaScript has six primitive data types: Number. String. Boolean. Null. Undefined. Symbol. It also has two compound data types
- What is hoisting in JavaScript? Hoisting is a JavaScript concept that refers to the process of moving declarations to the top of their scope. This means that variables and functions can be used before they are declared, as long as they are declared before they are used in a function.
- What is the difference between null and undefined? null is an assignment value that represents no value or an empty value, while undefined is a variable that has been declared but not assigned a value.
Jun 30, 2023 · In this blog post, we have compiled a comprehensive list of 50+ advanced JavaScript interview questions to help you prepare for your next job interview. These questions cover a wide range of topics and concepts, providing an opportunity for you to test your knowledge and enhance your skills.
Search no more! Come along and explore top hardest JavaScript Interview Questions and Answers including ES6, ES2015 for experienced web developer and get your next six-figure job offer.
- JavaScript has both strict and type–converting comparisons: * **Strict comparison (e.g., ===)** checks for value equality without allowing *coercio...
- The question is when a non-boolean value is coerced to a boolean, does it become `true` or `false`, respectively? The specific list of "falsy" valu...
- It’s an Immediately-Invoked Function Expression, or IIFE for short. It executes immediately after it’s created: ```js (function IIFE(){ console.log...
- I'm now using the following rule of thumb for functions in ES6 and beyond: * Use `function` in the global scope and for Object.prototype properties...
- Let's first look at example of each: ```js // ES5 Function Constructor function Person(name) { this.name = name; } // ES6 Class class Person { cons...
- Taken word-for-word from [MDN](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_objects/Function/bind): > The `bind()` method...
- They can be used in IIFEs to encapsulate some code within a local scope so that variables declared in it do not leak to the global scope. ```js (fu...
- `const` and `Object.freeze` are two completely different things. * `const` applies to **bindings** ("variables"). It creates an immutable binding,...
- Generators are functions which can be exited and later re-entered. Their context (variable bindings) will be saved across re-entrances. Generator f...
- To put it simple, generator has two features: * one can choose to jump out of a function and let outer code to determine when to jump back into the...
Dec 5, 2023 · Welcome to the Most asked JavaScript Interview Questions guide, your ultimate prep tool for mastering JavaScript interviews! 🚀 From the fundamentals to advanced concepts, we've got you covered. Let's get started!
Sep 9, 2024 · Basic Javascript Interview Questions. 1. What are the different data types in JavaScript? In JavaScript, there are several data types: Primitive types: Number: Represents both integer and floating-point numbers. String: Represents textual data. Boolean: Represents true or false.
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Mar 5, 2020 · Come along and explore the top hardest JavaScript Interview Questions and Answers including ES6, and ES2015 for experienced web developers and get your next six-figure job offer. Q1: Explain equality in JavaScript
