Shreya Singh’s Post

💡 A Different Kind of Interview Experience — Not Just Questions, But a Realisation Last week, I attended an interview for a Frontend Developer role, and honestly… it felt less like an interview and more like a deep tech conversation with a mentor. 🚀 Instead of rapid-fire questions, the interviewer focused on understanding how I think, how I solve, and how I collaborate. That made this experience truly memorable. Here’s a quick story-style breakdown 👇 ⸻ 🧠 JavaScript Moments The interviewer wasn’t looking for definitions — they wanted to know how I use JS in real scenarios. A few interesting discussions: • “If your code breaks due to hoisting, how do you debug it?” • “When would you avoid using var completely?” • “Explain event delegation by connecting it to a real project you built.” • “Why does this confuse beginners, and what’s your trick to understand it?” These weren’t questions… They were conversations. ⸻ ⚛️ ReactJS Insights React round felt like a friendly debate — “How do you make React apps faster without over-engineering?” We spoke about: • The real difference between useMemo & useCallback in large apps • Why unnecessary re-renders quietly kill performance • Hooks vs lifecycle — what really changed? • And the golden question: “How do you structure a scalable React project?” I actually enjoyed this part the most ⚙️ Next.js Scenarios Instead of theory, they gave me real-world situations: • “If the data changes every hour, will you choose getStaticProps or getServerSideProps?” • “How do you fix a slow page in Next.js?” • “Why does Next.js still dominate over CRA for production apps?” This made me think practically, not academically. 🛠 Mini Challenge A small but fun task: Build a todo list app with add, edit, delete — using React hooks. Not to test coding speed. But to check my code structure, clarity, and thought flow. ✨ What I Learned This interview taught me something valuable: 💡 Companies today don’t just want coders. They want thinkers. If you’re preparing for Frontend roles, focus on: ✔️ Solid JavaScript fundamentals ✔️ React performance & clean architecture ✔️ Practical knowledge of Next.js rendering ✔️ Clear communication of your thought process Interviews become easier when fundamentals become stronger. #FrontendDeveloper #ReactJS #JavaScript #NextJS #WebDevelopment #InterviewExperience #TechCareer #CareerGrowth #CodingJourney #DeveloperLife #FrontendEngineering #SoftwareDevelopment

⚡ 𝟴𝟬% 𝗼𝗳 𝗳𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗱𝗲𝘃𝘀 𝗳𝗮𝗶𝗹 𝗶𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄𝘀 - 𝗻𝗼𝘁 𝗯𝗲𝗰𝗮𝘂𝘀𝗲 𝘁𝗵𝗲𝘆 𝗹𝗮𝗰𝗸 𝘀𝗸𝗶𝗹𝗹, 𝗯𝘂𝘁 𝗯𝗲𝗰𝗮𝘂𝘀𝗲 𝘁𝗵𝗲𝘆 𝗳𝗼𝗰𝘂𝘀 𝗼𝗻 𝗳𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀 𝗶𝗻𝘀𝘁𝗲𝗮𝗱 𝗼𝗳 𝗳𝘂𝗻𝗱𝗮𝗺𝗲𝗻𝘁𝗮𝗹𝘀. They can explain React hooks perfectly... But struggle when asked why a component re-renders unexpectedly. 💬 𝗜𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄𝗲𝗿: “𝗬𝗼𝘂𝗿 𝗥𝗲𝗮𝗰𝘁 𝗮𝗽𝗽 𝘀𝗲𝗲𝗺𝘀 𝘀𝗹𝗼𝘄 - 𝘄𝗵𝗮𝘁’𝘀 𝘄𝗿𝗼𝗻𝗴?” Candidate: “React’s performance isn’t great.” Reality: It’s not React. It’s your 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁. After years of building and debugging frontend apps, one thing is clear: Most React bugs aren’t React’s fault — they’re JavaScript mistakes wearing a React costume. Here’s what that looks like in real life 👇 1️⃣ 𝗨𝗻𝗻𝗲𝗰𝗲𝘀𝘀𝗮𝗿𝘆 𝗿𝗲-𝗿𝗲𝗻𝗱𝗲𝗿𝘀 → Creating new objects/functions inside render. 2️⃣ 𝗦𝘁𝗮𝘁𝗲 𝘂𝗽𝗱𝗮𝘁𝗲𝘀 𝗳𝗮𝗶𝗹𝗶𝗻𝗴 → Mutating state directly. 3️⃣ 𝗠𝗲𝗺𝗼𝗿𝘆 𝗹𝗲𝗮𝗸𝘀 → Forgetting cleanup in useEffect. 4️⃣ 𝗦𝗹𝘂𝗴𝗴𝗶𝘀𝗵 𝗰𝗼𝗺𝗽𝗼𝗻𝗲𝗻𝘁𝘀 → Missing memoization for heavy computations. 5️⃣ “𝗥𝗲𝗮𝗰𝘁 𝗶𝘀 𝗯𝘂𝗴𝗴𝘆!” → Misunderstanding JS references or closures. The hard truth: React doesn’t slow your app down — it exposes inefficiencies in your code. Once you understand JavaScript deeply, React feels effortless. Before blaming the framework, ask yourself: Did I trigger an unnecessary render? Did I manage state immutably? Is this really a React issue… or a JS one? ✅ Interview tip: When asked, “𝗛𝗼𝘄 𝗱𝗼 𝘆𝗼𝘂 𝗼𝗽𝘁𝗶𝗺𝗶𝘇𝗲 𝗮 𝗥𝗲𝗮𝗰𝘁 𝗮𝗽𝗽?” Don’t just say “useMemo” or “React.lazy.” Say: “I start by identifying unnecessary renders and optimizing data flow.” That’s how you stand out as a Frontend Engineer, not just a React user. 𝗠𝗮𝘀𝘁𝗲𝗿 𝘁𝗵𝗲 𝗳𝘂𝗻𝗱𝗮𝗺𝗲𝗻𝘁𝗮𝗹𝘀. React will follow. 🚀 For more such frontend and interview insights follow Sudharshan Pani G. #React #JavaScript #FrontendDevelopment #InterviewTips #WebPerformance #EngineeringExcellence

🚀⚛️ Master React from Zero to Advanced —Interview Question⚛️ Are you diving into frontend development or preparing for React interviews? Here’s something that will make your journey smoother — my comprehensive React Notes (Handwritten + Conceptual) covering 50 essential interview questions with clear, beginner-friendly answers. 📘 What’s Inside: ✅ Core React concepts — JSX, Virtual DOM, Components, Props & State ✅ Hooks explained — useState, useEffect, useReducer, useContext, useMemo ✅ Advanced topics — Redux, Context API, Error Boundaries, Suspense, Code Splitting ✅ Practical examples to strengthen your fundamentals 💡 Whether you're a beginner learning React or a developer preparing for interviews, these notes will help you revise quickly and confidently. 👉Follow-Gyanendra Namdev Let’s build beautiful UIs with the power of React ⚛️ #ReactJS #WebDevelopment #Frontend #JavaScript #ReactHooks #LearningJourney #CodingCommunity #100DaysOfCode

🚀 𝐌𝐚𝐬𝐭𝐞𝐫 𝐑𝐞𝐚𝐜𝐭.𝐣𝐬 𝐈𝐧𝐭𝐞𝐫𝐯𝐢𝐞𝐰𝐬 𝐰𝐢𝐭𝐡 𝐓𝐡𝐢𝐬 𝐂𝐨𝐦𝐩𝐫𝐞𝐡𝐞𝐧𝐬𝐢𝐯𝐞 𝐆𝐮𝐢𝐝𝐞!! 💻 Are you preparing for a React.js interview or looking to strengthen your frontend fundamentals? I've compiled a complete set of 140+ React.js Interview Questions & Answers covering: ✅ React fundamentals (JSX, Components, Props, State) ✅ React Hooks (useState, useEffect, useReducer, useContext, etc.) ✅ Redux and state management ✅ React Router, Context API, and lifecycle methods ✅ Advanced concepts like SSR, code-splitting, memoization & optimization This guide is perfect for: 👉 Frontend developers preparing for job interviews 👉 React beginners who want to dive deeper into core concepts 👉 Professionals looking to brush up on key topics 📘 Download the full PDF below and start your React.js learning journey today! Let’s keep learning and growing together in the tech community. ✨ #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #InterviewPreparation #ReactInterview #CodingCommunity

🌟 My Recent React.js Interview Experience I recently appeared for a React.js interview, and it turned out to be a great learning experience. The discussion covered core concepts like component lifecycle, hooks, state management, routing, and performance optimization. I also spoke about my hands-on experience with building reusable UI components, integrating REST APIs, and managing state with tools like Redux and Context API. The interview gave me a fresh perspective on frontend best practices and reminded me why I enjoy building intuitive, user-friendly interfaces. 💡 Every interview is a step forward — either you win or you learn. I'm excited to keep improving my skills and explore more challenging opportunities ahead. 🔍 7 React.js Interview Questions & Answers (Quick Recap) 1️⃣ What is the Virtual DOM? The Virtual DOM is a lightweight copy of the real DOM. React updates this virtual version first and then efficiently updates only the required parts of the real DOM using the diffing algorithm. 2️⃣ What are React Hooks? Hooks let you use state and other React features without writing class components. Common hooks include useState, useEffect, useContext, useMemo, and useCallback. 3️⃣ Difference between State and Props? State: Internal, mutable data managed within a component. Props: External, read-only data passed from parent to child. State is for dynamic data; props are for communication. 4️⃣ What is useEffect used for? useEffect manages side effects such as API calls, timers, event listeners, and DOM updates. It runs after render and re-runs based on its dependency array. 5️⃣ What is “lifting state up”? When multiple components need access to the same data, the state is moved to their nearest common parent to ensure consistent state management. 6️⃣ Why do we use React Router? React Router enables navigation in single-page applications (SPAs) without page reloads, helping manage routes, nested layouts, and dynamic parameters. 7️⃣ What is memoization in React? Memoization prevents unnecessary re-renders by caching values or function references using tools like React.memo(), useMemo(), and useCallback(). #reactjs #frontenddeveloper #javascript #webdevelopment #interviewexperience #techinterview #learningeveryday #softwareengineering #careerjourney #reacthooks

🤯 React 2/10 - Almost 90% React Devs know this, but failed to answer this React interview Question. Do you know? Here is the question 👇 “Why are hooks declarations not allowed inside any function (or conditional block) inside a React component?” ✅ Quick Explanation Because React relies on the order of Hook calls to correctly associate state and effects with their respective components. If you call Hooks conditionally or inside nested functions, that order can change between renders, and React would lose track of which state belongs to which Hook. 🔥 Code Explanation React uses an internal array (or linked list) to keep track of Hooks for each component. For example, when your component renders: function MyComponent() { const [count, setCount] = useState(0); // Hook #1 const [text, setText] = useState(''); // Hook #2 useEffect(() => console.log(count)); // Hook #3 ... } React doesn’t identify hooks by name => it relies on the order: First hook → state slot 1 Second hook → state slot 2 Third hook → effect slot 3 🏆 Comment down which topic you find hard in the React Interviews --- ✅ Check out FrontendGeek.com to Ace Frontend Interview ✅ "AI SaaS Starter" - To start creating your AI-integrated Free-infra SaaS project in a single day, not in weeks or months - 50% OFF "FIRST50" https://lnkd.in/gNhKpZit   🚀 Follow Anuj Sharma & FrontendGeek to stay tuned with Frontend Interview preparation tips, development, & jobs     #frontend #interview #frontendinterview #javascript #js #reactjs #preparation #questions #frontendgeek #ES6 #growth #jobs

⚛️ 𝗬𝗼𝘂𝗿 𝗥𝗲𝗮𝗰𝘁 𝗠𝗮𝘀𝘁𝗲𝗿𝘆 𝗝𝗼𝘂𝗿𝗻𝗲𝘆 𝗦𝘁𝗮𝗿𝘁𝘀 𝗧𝗼𝗱𝗮𝘆 — 𝗛𝗲𝗿𝗲’𝘀 𝘁𝗵𝗲 𝗥𝗲𝘀𝗼𝘂𝗿𝗰𝗲 𝗬𝗼𝘂 𝗪𝗶𝘀𝗵 𝗬𝗼𝘂 𝗛𝗮𝗱 𝗘𝗮𝗿𝗹𝗶𝗲𝗿! 🚀🔥 Every aspiring frontend developer knows React… But only a few understand it deeply enough to crack real interviews. Most people collect random notes, watch scattered videos, memorize buzzwords — and still feel stuck. So I decided to build something that actually helps 👇 📘 𝗧𝗵𝗲 𝗨𝗹𝘁𝗶𝗺𝗮𝘁𝗲 𝗥𝗲𝗮𝗰𝘁 𝗜𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄 𝗣𝗹𝗮𝘆𝗯𝗼𝗼𝗸 — “𝗥𝗲𝗮𝗰𝘁 𝗜𝗠𝗣 𝗤𝘀.𝗽𝗱𝗳” A structured, hand-picked collection of the most frequently asked React interview questions, 𝗰𝗼𝘃𝗲𝗿𝗶𝗻𝗴: JSX & Virtual DOM State vs Props & Lifecycle Hooks (useState, useEffect, useMemo, useCallback) Context API vs Redux Custom Hooks & Component Optimization Re-rendering Patterns & Memoization SSR, Next.js & Real-world React Architecture This isn't a random Q&A file — It's a learning + revision system to help you speak React like a pro in interviews. 🎯 𝗪𝗵𝗼 𝗜𝘀 𝗧𝗵𝗶𝘀 𝗙𝗼𝗿? Students preparing for frontend interviews Developers transitioning from JS to React Engineers needing a structured revision guide Anyone who wants to master React fundamentals + advanced patterns 🧠 𝗪𝗵𝘆 𝗧𝗵𝗶𝘀 𝗣𝗗𝗙 𝗛𝗲𝗹𝗽𝘀 You don’t just read questions — you learn how to think like a React engineer: ✅ Deep conceptual understanding ✅ Real-world interview reasoning ✅ Confidence to explain ideas clearly ✅ No more “uhh… I forgot the lifecycle order” moments 😅 💬 𝗣𝗲𝗿𝘀𝗼𝗻𝗮𝗹 𝗡𝗼𝘁𝗲: I built this because I’ve been there — staring at the interview screen thinking: "Wait… how do I explain useEffect without sounding confused?" 😅 If this guide saves even one person from that panic… mission accomplished ✨ credit- Supriya Darisa #ReactJS #Frontend #WebDevelopment #JavaScript #InterviewPreparation #SDEPrep #LearningJourney #DevCommunity

⚛️ 𝗬𝗼𝘂𝗿 𝗥𝗲𝗮𝗰𝘁 𝗠𝗮𝘀𝘁𝗲𝗿𝘆 𝗝𝗼𝘂𝗿𝗻𝗲𝘆 𝗦𝘁𝗮𝗿𝘁𝘀 𝗧𝗼𝗱𝗮𝘆 — 𝗛𝗲𝗿𝗲’𝘀 𝘁𝗵𝗲 𝗥𝗲𝘀𝗼𝘂𝗿𝗰𝗲 𝗬𝗼𝘂 𝗪𝗶𝘀𝗵 𝗬𝗼𝘂 𝗛𝗮𝗱 𝗘𝗮𝗿𝗹𝗶𝗲𝗿! 🚀🔥 Every aspiring frontend developer knows React… But only a few understand it deeply enough to crack real interviews. Most people collect random notes, watch scattered videos, memorize buzzwords — and still feel stuck. So I decided to build something that actually helps 👇 📘 𝗧𝗵𝗲 𝗨𝗹𝘁𝗶𝗺𝗮𝘁𝗲 𝗥𝗲𝗮𝗰𝘁 𝗜𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄 𝗣𝗹𝗮𝘆𝗯𝗼𝗼𝗸 — “𝗥𝗲𝗮𝗰𝘁 𝗜𝗠𝗣 𝗤𝘀.𝗽𝗱𝗳” A structured, hand-picked collection of the most frequently asked React interview questions, 𝗰𝗼𝘃𝗲𝗿𝗶𝗻𝗴: JSX & Virtual DOM State vs Props & Lifecycle Hooks (useState, useEffect, useMemo, useCallback) Context API vs Redux Custom Hooks & Component Optimization Re-rendering Patterns & Memoization SSR, Next.js & Real-world React Architecture This isn't a random Q&A file — It's a learning + revision system to help you speak React like a pro in interviews. 🎯 𝗪𝗵𝗼 𝗜𝘀 𝗧𝗵𝗶𝘀 𝗙𝗼𝗿? Students preparing for frontend interviews Developers transitioning from JS to React Engineers needing a structured revision guide Anyone who wants to master React fundamentals + advanced patterns 🧠 𝗪𝗵𝘆 𝗧𝗵𝗶𝘀 𝗣𝗗𝗙 𝗛𝗲𝗹𝗽𝘀 You don’t just read questions — you learn how to think like a React engineer: ✅ Deep conceptual understanding ✅ Real-world interview reasoning ✅ Confidence to explain ideas clearly ✅ No more “uhh… I forgot the lifecycle order” moments 😅 💬 𝗣𝗲𝗿𝘀𝗼𝗻𝗮𝗹 𝗡𝗼𝘁𝗲: I built this because I’ve been there — staring at the interview screen thinking: "Wait… how do I explain useEffect without sounding confused?" 😅 If this guide saves even one person from that panic… mission accomplished ✨ credit- Supriya Darisa #ReactJS #Frontend #WebDevelopment #JavaScript #InterviewPreparation #SDEPrep #LearningJourney #DevCommunity

🚀 Hello everyone, after facing so many React.js interviews one idea comes in my mind that's I've to collect all those challenges & make a single project. So I built a complete website with 20+ practical challenges that are actually asked in real interviews. ✨ What's Inside: - Data tables with sorting, search & pagination - Infinite scroll using Intersection Observer API - Drag-and-drop Kanban boards - Multi-step forms with validation - Auto-complete with debouncing - Custom hooks (useDebounce, usePrevious) - Real-time chat UI - Image galleries with lazy loading ...and 12 more challenges! 💡 Why I Built This: Stop memorizing tutorials. Start building real components that interviewers ask for. Every challenge includes: ✅ Complete working code ✅ Best practices ✅ Modern React patterns ✅ Responsive design 🔗 Live Demo: [https://lnkd.in/dMSFQ7db] 💻 GitHub: [https://lnkd.in/dBtCbFdF] This project is 100% free and open source. Perfect for developers with 0-4 years of experience preparing for React interviews. #React #JavaScript #WebDevelopment #OpenSource #InterviewPrep #ReactJS #Frontend #Coding #Developer #WebDev #Programming

🤯 React 3/10 - This simple React interview question will blow your mind - What is the output? At first glance, this question looks straightforward, but there is a catch Comment down your answer before checking the solution, and if there is an issue, what is the fix? . . . . This code resulted error "Too many re-renders. React limits the number of renders to prevent an infinite loop." ⚠️ Why does it happen? 1️⃣ React re-renders a component whenever state changes. 2️⃣ Here’s what’s happening conceptually: You call setCounter(counter + 1) during render. 3️⃣ That triggers a state update (counter → 1). React re-renders the component. 4️⃣ The render again calls setCounter(counter + 1). This repeats infinitely. → Infinite loop = React stops you with an error. ✅ If you fix the direct updates Let’s move the setCounter calls inside proper places: const [counter, setCounter] = useState(0); useEffect(() => { setCounter(c => c + 1); // runs once after first render }, []); Now the sequence is: 1️⃣ First render: counter = 0, effect scheduled. 2️⃣ Effect runs (after paint): setCounter(c => c + 1) → triggers re-render. 3️⃣ Second render: counter = 1. 4️⃣ Effect doesn’t run again (empty dependency array []). Final state: counter = 1. --- ✅ Check out FrontendGeek.com to Ace Frontend Interview ✅ "AI SaaS Starter" - To start creating your AI-integrated Free-infra SaaS project in a single day, not in weeks or months - 50% OFF "FIRST50" https://lnkd.in/gNhKpZit   🚀 Follow Anuj Sharma & FrontendGeek to stay tuned with Frontend Interview preparation tips, development, & jobs   #frontend #interview #Interviewquestion #frontendinterview #javascript #js #reactjs #preparation #questions #frontendgeek #ES6 #growth #jobs