React Async Functions vs Promises in JavaScript

Day 8 of my React Interview Journey  Today’s topic: Difference between Redux and Context API State management is one of the most important concepts in React applications. Both Redux and Context API help us manage state, but they solve different problems: Redux Centralized state management Best for large-scale applications Powerful but comes with setup complexity Context API Built-in React feature Best for small to medium apps Simple and lightweight for sharing state 👉 What do you think: When should we prefer Redux over Context API? 💬 Drop your thoughts in the comments below! #ReactJS #Redux #ContextAPI #WebDevelopment #JavaScript #FrontendDevelopment #CodingJourney #100DaysOfCode #MERNStack #InterviewPreparation

Flattening arrays in JavaScript doesn’t have to be complicated 👇 Instead of writing long logic, just remember this: 🔹 Use flat(Infinity) 🔹 It converts nested arrays into a single-level array in one line. For interviews, knowing the recursive approach gives you an extra edge. #JavaScript #WebDevelopment #CodingTips #Frontend #LearnToCode

Day 9 – React Interview Journey 🚀 DOM: The Document Object Model is a tree structure of your webpage that browsers use to display and update content. Why Virtual DOM? The Virtual DOM was created to improve performance by minimizing direct updates to the real DOM. 💬 What’s one React concept you struggled with at first? Drop it below 👇 #Day9 #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #CodingJourney #InterviewPrep

Day 17 of My Frontend Interview Preparation 🚀 Today I focused on one of the most important concepts in JavaScript — Prototype & Prototype Chaining. I learned how every object in JavaScript has a hidden link to another object (its prototype), and how JavaScript uses this chain to access properties and methods. This really helped me understand how things like arrays, functions, and objects share common behavior behind the scenes. Also cleared my confusion between __proto__ vs prototype — now it finally makes sense where each one is used 🙌 Along with this, I practiced several output-based questions, which helped me strengthen my understanding of tricky concepts and edge cases. 📌 Key Takeaways: How prototype works internally What is prototype chaining Difference between __proto__ and .prototype Improving problem-solving with output-based questions Slowly building strong fundamentals, one day at a time 💪 #Day17 #JavaScript #FrontendDevelopment #InterviewPreparation #WebDevelopment #CodingJourney

🚨 React Interview Scenario (Real World) You have a component that fetches data from an API. useEffect(() => { fetchData(); }, []); Everything works fine… But suddenly: 👉 API is called multiple times 👉 Even though dependency array is empty 👀 Why is this happening? 👉 How would you fix it? Bonus: What changes in production vs development? #ReactJS #FrontendInterview #ReactHooks #JavaScript #FrontendDeveloper #WebDevelopment

✨ Why Do We Need TypeScript? (Interview Question) JavaScript is powerful — but as applications grow, managing large codebases can become difficult. In today’s post, I’ve explained one of the most commonly asked interview questions: *Why do we need TypeScript?* TypeScript adds a layer of type safety on top of JavaScript, helping you catch errors during development instead of at runtime. It makes your code more predictable, easier to refactor, and much more maintainable — especially when working in teams or on large-scale applications. I’ve also covered how TypeScript improves developer experience with better autocomplete, tooling, and clearer code structure. If you’re preparing for interviews or working on production-level apps, understanding this concept can really set you apart. 👇 How has TypeScript helped you in your projects — or are you still sticking with plain JavaScript? #Day961 #learningoftheday #1000daysofcodingchallenge #FrontendDevelopment #WebDevelopment #JavaScript #TypeScript #CodingCommunity #InterviewPreparation

🚀 Day 961 of #1000DaysOfCode ✨ Why Do We Need TypeScript? (Interview Question) JavaScript is powerful — but as applications grow, managing large codebases can become difficult. In today’s post, I’ve explained one of the most commonly asked interview questions: *Why do we need TypeScript?* TypeScript adds a layer of type safety on top of JavaScript, helping you catch errors during development instead of at runtime. It makes your code more predictable, easier to refactor, and much more maintainable — especially when working in teams or on large-scale applications. I’ve also covered how TypeScript improves developer experience with better autocomplete, tooling, and clearer code structure. If you’re preparing for interviews or working on production-level apps, understanding this concept can really set you apart. 👇 How has TypeScript helped you in your projects — or are you still sticking with plain JavaScript? #Day961 #learningoftheday #1000daysofcodingchallenge #FrontendDevelopment #WebDevelopment #JavaScript #TypeScript #CodingCommunity #InterviewPreparation

React Interview Question 🚀 What is Virtual DOM? Virtual DOM is a lightweight copy of the real DOM. React compares previous and current Virtual DOM and updates only changed elements. This makes React: • Faster • Efficient • Optimized React uses reconciliation algorithm for updates. Can you explain Virtual DOM in one sentence? #reactjs #interviewprep #frontenddeveloper #mernstack #javascript #reactdeveloper #webdevelopment #coding #developers #reactinterview

One of the interesting questions asked in my interview was: ❓ “What are Microtasks and Macrotasks in JavaScript?” 💠 Understanding the Concept 🔹 JavaScript uses an event loop to handle asynchronous operations. 📌 Tasks are mainly divided into: 👉 Micro tasks : 🔹 High priority tasks 🔹 Executed immediately after the current synchronous code 🔹 Processed before macrotasks ✅ Examples: 🔹 Promise.then() 🔹 catch, finally 🔹 queueMicrotask() 👉 Macro tasks : 🔹 Lower priority compared to microtasks 🔸 Executed after microtasks queue is empty ✅ Examples: 🔹 setTimeout() 🔹 setInterval() 🔹 setImmediate() (Node.js) 🔄 Execution Order 🔹 Run synchronous code 🔹 Execute all microtasks 🔹 Execute one macrotask 🔹 Repeat This question tests understanding of Event loop, Asynchronous behavior and Execution order in JavaScript #JavaScript #EventLoop #AsyncProgramming #InterviewPrep #WebDevelopment #Learning #frontend #interviewExxperiance #interview