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Here are the 50 JavaScript interview questions for 2024 1. What is JavaScript? 2. What are the data types in JavaScript? 3. What is the difference between null and undefined? 4. Explain the concept of hoisting in JavaScript. 5. What is a closure in JavaScript? 6. What is the difference between “==” and “===” operators in JavaScript? 7. Explain the concept of prototypal inheritance in JavaScript. 8. What are the different ways to define a function in JavaScript? 9. How does event delegation work in JavaScript? 10. What is the purpose of the “this” keyword in JavaScript? 11. What are the different ways to create objects in JavaScript? 12. Explain the concept of callback functions in JavaScript. 13. What is event bubbling and event capturing in JavaScript? 14. What is the purpose of the “bind” method in JavaScript? 15. Explain the concept of AJAX in JavaScript. 16. What is the “typeof” operator used for? 17. How does JavaScript handle errors and exceptions? 18. Explain the concept of event-driven programming in JavaScript. 19. What is the purpose of the “async” and “await” keywords in JavaScript? 20. What is the difference between a deep copy and a shallow copy in JavaScript? 21. How does JavaScript handle memory management? 22. Explain the concept of event loop in JavaScript. 23. What is the purpose of the “map” method in JavaScript? 24. What is a promise in JavaScript? 25. How do you handle errors in promises? 26. Explain the concept of currying in JavaScript. 27. What is the purpose of the “reduce” method in JavaScript? 28. What is the difference between “null” and “undefined” in JavaScript? 29. What are the different types of loops in JavaScript? 30. What is the difference between “let,” “const,” and “var” in JavaScript? 31. Explain the concept of event propagation in JavaScript. 32. What are the different ways to manipulate the DOM in JavaScript? 33. What is the purpose of the “localStorage” and “sessionStorage” objects? 34. How do you handle asynchronous operations in JavaScript? 35. What is the purpose of the “forEach” method in JavaScript? 36. What are the differences between “let” and “var” in JavaScript? 37. Explain the concept of memoization in JavaScript. 38. What is the purpose of the “splice” method in JavaScript arrays? 39. What is a generator function in JavaScript? 40. How does JavaScript handle variable scoping? 41. What is the purpose of the “split” method in JavaScript? 42. What is the difference between a deep clone and a shallow clone of an object? 43. Explain the concept of the event delegation pattern. 44. What are the differences between JavaScript’s “null” and “undefined”? 45. What is the purpose of the “arguments” object in JavaScript? 46. What are the different ways to define methods in JavaScript objects? 47. Explain the concept of memoization and its benefits. 48. What is the difference between “slice” and “splice” in JavaScript arrays? 49. What is the purpose of the “apply” and “call” methods in JavaScript? 50. Explain the concept of the event loop in JavaScript and how it handles asynchronous operations.

🔅 Learn JavaScript: Write Modern Code with JavaScript ESNext 🌐 Author: Shaun Wassell 🔰 Level: Intermediate ⏰ Duration: 5h 21m

🌀 Master JavaScript with advanced concepts and functions covered in technical interviews.

📗 Topics: JavaScript, Node.js

🔰 JavaScript Array Cheatsheet

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JavaScript console methods are super helpful for troubleshooting and keeping track of what’s happening in our code! 🚀

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🔰 encodeURI and decodeURI in JavaScript

It is important to learn about these functions to ensure URLs are properly formatted for use in HTTP requests. Also for safely transmitting URLs that contain special characters or spaces. and Working with APIs that require encoded URLs for queries. By using encodeURI() and decodeURI(), developers can ensure that their URIs are properly formatted and safely transmitted across different systems and platforms.

🔰 8 Types of JS Functions

👆 Round sizes for software startups over the past 12 months. ✔️Powered by The Startups VC

🚨 OpenAI raises $8.3B at $300B valuation According to the New York Times, OpenAI has raised $8.3 billion at a jaw-dropping $300 billion valuation — months ahead of schedule. The deal is part of its plan to secure $40B in total funding this year. 🖱 First reported by DealBook, this is OpenAI’s largest round to date 🖱 SoftBank has already committed $30B for the year 🖱 The funding underscores the escalating race for AI dominance 🖱 Wall Street attention has shifted from tech giants to frontier labs like OpenAI

The compute arms race is in full swing — and OpenAI just pulled far ahead.

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📣 Why Sam Altman Says You Shouldn’t Track User Growth Early On In the early stages of a startup, it’s not about how many users you have — it’s about how much they love your product. Altman explains why obsession with absolute growth is a mistake, and what you should focus on instead: 🔸 A small group of obsessed users is better than a wide pool of casual ones 🔸 Deep engagement signals product-market fit more than raw numbers 🔸 Retention and frequency are your best early metrics 🔸 Word-of-mouth is the ultimate validation

Almost all great companies start with a product that a few people love.

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📣 Why Sam Altman Says You Shouldn’t Track User Growth Early On In the early stages of a startup, it’s not about how many users you have — it’s about how much they love your product. Altman explains why obsession with absolute growth is a mistake, and what you should focus on instead: 🔸 A small group of obsessed users is better than a wide pool of casual ones 🔸 Deep engagement signals product-market fit more than raw numbers 🔸 Retention and frequency are your best early metrics 🔸 Word-of-mouth is the ultimate validation

Almost all great companies start with a product that a few people love.

📊 Powered by Crypto Insider

📣 Why Sam Altman Says You Shouldn’t Track User Growth Early On In the early stages of a startup, it’s not about how many users you have — it’s about how much they love your product. Altman explains why obsession with absolute growth is a mistake, and what you should focus on instead: 🔸 A small group of obsessed users is better than a wide pool of casual ones 🔸 Deep engagement signals product-market fit more than raw numbers 🔸 Retention and frequency are your best early metrics 🔸 Word-of-mouth is the ultimate validation

Almost all great companies start with a product that a few people love.

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🔰 Working with URLs in JavaScript!!

Key JavaScript URL operations to simplify building, parsing, and dynamically managing web resources efficiently.

Tired of async/await bugs crashing your app? 😖 Learn clean, practical patterns to handle async errors like a pro!

🔰 Conditional Types for Flexible Logic

Use Conditional Types to create type-safe APIs, dynamic utility types, and ensure precise type behavior in complex systems.

🔰 Learn JavaScript in 60 Minutes: The Ultimate Beginner Course This JavaScript crash course for beginners is the perfect starting point if you want to learn JavaScript in one hour. You'll go from understanding JavaScript syntax, variables, data types, if statements, loops, and functions. Whether you're just starting out or need a refresher, this beginner-friendly JavaScript tutorial covers everything you need to start coding with JavaScript. You'll learn about JavaScript DOM manipulation, functions and more — all explained in a clear and practical way. This video is part of the full JavaScript course and gives you a solid foundation for front-end web development. Learn JavaScript fast, build real things, and prepare for more advanced JavaScript projects. ⏱️ Timestamps 00:00:00 What is JavaScript? 00:02:43 Installation / Tools / Basic Setup 00:06:38 First Steps in JavaScript 00:16:42 JavaScript Basics 00:42:20 If Statements 00:50:40 Loops 00:56:27 Functions 01:05:48 DOM