Bohdan Hutsaliuk’s Post

🚀 React Most Asked Interview Question: How do you pass data from a Child Component back to a Parent Component? This is one of the most common concepts every React developer must know — and interviewers love to ask it! In this video, I explained this concept in the simplest way: 🔹 Parent creates a function 🔹 Function is passed to the child as a prop 🔹 Child calls the function and sends the data back 🔹 Parent receives that data and updates its state This technique is called “Lifting State Up” — and it helps keep your components clean, manageable, and predictable. Hope this video helps beginners and job-seekers understand this important React concept more clearly! 💡 #reactjs #reactdeveloper #frontenddevelopment #javascript #webdevelopment #interviewpreparation #reactinterview #codingtips

Master These 5 JavaScript Concepts to Boost Your Interview Success. If you're preparing for any JavaScript or Frontend interview, these 5 concepts are the real game-changers. Most interview questions — theoretical or practical — directly point back to these fundamentals: 1️⃣ Closures Understanding lexical scope and how inner functions access outer variables. 2️⃣ Promises The foundation of modern asynchronous programming in JavaScript. 3️⃣ Hoisting How JavaScript handles variable and function declarations before execution. 4️⃣ Event Loop The mechanism that controls execution, concurrency, and async behavior. 5️⃣ Async/Await Cleaner, readable syntax built on Promises for writing async code efficiently. 💡 Conclusion Mastering these concepts not only helps you clear interviews but also improves how you write and debug JavaScript in real projects. #JavaScript #WebDevelopment #FrontendDevelopment #TechInterview #CodingInterview #DeveloperSkills #LearnJavaScript

🚀 Top 50 React Interview Questions You Must Know in 2025! Cracking a React interview isn’t just about coding — it’s about understanding the core concepts, advanced features, and real-world use cases. I’ve compiled the 50 most asked React interview questions to help you level up your prep: ✅ Basics of React ✅ JSX & Virtual DOM ✅ Components (Functional vs Class) ✅ Props & State ✅ Lifecycle Methods & Hooks ✅ Context API & Redux ✅ Performance Optimization ✅ React Router & Navigation ✅ Error Boundaries & Testing ✅ Latest React 18+ Features 💡 Whether you’re a beginner stepping into frontend or an experienced dev aiming for senior roles, these questions will guide your preparation. 👉 Want me to share the complete list with answers? Drop a “🔥 React” in the comments, and I’ll send it to you! #ReactJS #FrontendDevelopment #InterviewPrep #WebDevelopment #JavaScript #CareerGrowth

When you’re preparing for JavaScript or frontend interviews, the hardest part isn’t finding resources. It’s knowing what to study, what to ignore, and how deep to go. I wasted months jumping between blogs, videos, and random GitHub repos trying to understand: Why does this behave differently? Why does my async code run out of order? Why do closures break my brain? Why do two objects with the same keys still fail comparison? I finally realized something important: Interviewers don’t care if you memorized syntax. They care if you understand how JavaScript actually works. So I built something I wish I had on day one: The Complete JavaScript Interview Handbook A structured, end-to-end guide designed specifically for interview preparation: ✅ 28 chapters that go from fundamentals to advanced concepts ✅ 200+ working code examples you can copy, tweak, and learn from ✅ Polyfills, deep clones, async control flow, LRU cache, stacks, queues ✅ Patterns like debouncing, currying, event delegation, composition ✅ A practical 7-week plan so you know exactly what to study and when Every chapter focuses on: • how things work internally • how interviewers ask about it • how to explain it confidently If you’re preparing for frontend roles (React, JS, full-stack), this handbook will save you weeks of confusion. 📘 Link in the first comment #JavaScript #FrontendInterview #FrontendDevelopment #ReactJS #DSA #WebDevelopment #CareerGrowth

🚀 JavaScript Interviews in 2025 Have Evolved It's no longer just about memorizing syntax—today, it's all about how well you can reason through code, scale solutions, and solve real-world problems. That's why I've put together something special for you: 📑 40 JavaScript Questions Recruiters Ask in 2025 Inside this comprehensive PDF, you’ll find: ✅ Core Fundamentals: Everything every frontend developer must master ✅ Advanced Quirks: Common pitfalls even experienced developers face ✅ Clear, Practical Answers: Going beyond theory, with actionable insights #JobSearch #TechRecruitment #InterviewPreparation #FrontendDev #WebDevelopment #FrontendDevelopment #JavaScriptFundamentals #DevEssentials

🚀 Ace Your Front-End Developer Interview Like a Pro! 💻 Preparing for your next Front-End Developer interview? Here’s a complete guide featuring most-asked technical questions — explained with clarity, real examples, and best practices to help you stand out! 📘 Key Topics You’ll Master: ✅ Deep JavaScript Concepts (like Closures & Scope) ✅ Responsive Design & Modern UI Principles ✅ HTML5 & CSS3 Best Practices ✅ Popular Frameworks — React, Vue, Angular ✅ Real-world Problem-Solving Scenarios 💡 Pro Tip: Strengthen your core in HTML, CSS, and JavaScript before diving deep into frameworks. A solid foundation always wins interviews. 🔥 Stay tuned for more advanced Front-End Interview Q&A series to level up your dev journey! #FrontendDeveloper #WebDevelopment #CodingInterview #JavaScript #ReactJS #TechCareer #DeveloperCommunity #CareerGrowth #Frontend #InterviewPreparation

✅ Practical ReactJS Coding Interview Questions (Must-Practice!) 🚀 Preparing for a React Developer Interview? Most companies today don't stop at theory — they test your hands-on React skills with practical coding tasks. Here are some of the most commonly asked practical coding challenges that top companies use to evaluate React developers: 💡 Practice These Before Your Next Interview: 🔹 Build a custom hook for reusable API calls 🔹 Implement debounce in a functional component 🔹 Create a reusable <Modal /> component 🔹 Implement Infinite Scrolling in React 🔹 Build a Todo App using useReducer 🔹 Convert a Class Component → Functional Component with Hooks 🔹 Show difference between useMemo, useCallback, and React.memo 🔹 Implement an Error Boundary 🔹 Build a Theme Switcher using Context API 🔹 Create a Dynamic Form from JSON Config 💭 Tip: Focus on reusability, performance, and clean code architecture — this is what interviewers evaluate the most! #ReactJs WebDevelopment #Frontend #JavaScript #RxJS #NgRx #CareerGrowth #InterviewPreparation

I've interviewed 100+ engineers for JavaScript roles. 95% of interviews ask about the same 10-15 concepts. Closures. Promises. Event loop. Prototypes. This keyword. That's it. That's the list. Yet I see candidates who've spent months learning GraphQL internals, Nextjs, latest frameworks or advanced TypeScript generics they'll never be asked about. Don't get me wrong those are useful. But not for interviews. Here's what actually happens in most JavaScript interviews: Round 1: Fundamentals (closures, scope, hoisting) Round 2: Async JavaScript (promises, event loop, async/await) Round 3: Practical problems (implement a polyfill, debug some code) Round 4: System design or take-home If you can't explain closures clearly, you won't make it past Round 1. If you don't understand the event loop, Round 2 will eliminate you. I learned this the hard way. Then I started documenting every question I encountered. After 3 years and 100+ interviews (both sides of the table), I compiled everything into one resource. The Complete JavaScript Interview Handbook covers those 28 core concepts that actually matter. Not everything you could learn. Just what you need to pass interviews. Each concept has: - Clear explanation (no academic jargon) - Working code examples - Common interview variations - How to explain it during interviews Been working on this for 2 years. Finally ready to share it. Link in comments if you're interested. #javascript #interviews #careerdevelopment

🚀JavaScript Important Interview Questions If you’re preparing for frontend developer or JavaScript developer interviews, mastering core concepts is key. Here’s a quick guide based on top interview topics that help you ace your next JavaScript interview 👇 🔹 Top JavaScript Concepts to Revise: ✅ Introduction to JavaScript ✅ Variables and Data Types ✅ Operators (Arithmetic, Logical, Comparison) ✅ Conditional Statements (if, else, switch) ✅ Loops (for, while, do…while) ✅ Functions and Return Statements ✅ Arrays and Objects ✅ Events and Event Handling ✅ JavaScript Objects (Math, Date, String) ✅ DOM Manipulation ✅ Interview Logic Practice Questions 💬 Example Question: 👉 What is the difference between var, let, and const in JavaScript? 👉 How does JavaScript handle scope and hoisting? 👉 What is the difference between == and ===? 👉 Explain how events work in JavaScript. 📘 Tip: Practice writing code for each topic and understand how it works behind the scenes #JavaScript #FrontendDevelopment #WebDevelopment #JavaScriptInterview #CodingInterview #TechInterview #FrontendEngineer #DeveloperCommunity #CodingPreparation

🚀 Master React.js Interview Questions with Confidence! If you’re preparing for a React.js technical interview, this document is a must-read. It covers everything — from core concepts like JSX, Virtual DOM, and Hooks to advanced topics like Lifecycle Methods, Prop Drilling, Custom Hooks, and Higher-Order Components. 💡 Each question comes with clear, easy-to-understand answers that help you revise React concepts quickly and effectively. 📘 Topics Covered: ✅ Features of React ✅ Virtual DOM & Components ✅ useState, useEffect, and Hooks ✅ Lifecycle Methods ✅ React Router ✅ Custom & Higher Order Components 🔔 For more content follow 👉 Gyanendra Namdev #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #TechInterview #Learning #Developers #React #CodingInterview