Find Missing Number in Array with JavaScript

Preparing for JavaScript Interviews? Start with these questions: => What is the difference between var, let, and const? => What is hoisting in JavaScript? => What is the event loop and how does it work? => What are closures and where have you used them? => What is the difference between synchronous and asynchronous code? => How do promises work in JavaScript? => What is the difference between == and ===? => What are arrow functions and how are they different from regular functions? => What is the difference between call, apply, and bind? => What is prototypal inheritance? => How does this keyword work in different contexts? => What are higher order functions? => What is currying in JavaScript? => What is memoization? => What is the difference between shallow copy and deep copy? => What are callbacks and callback hell? => What is debouncing and throttling? => What are ES6 features you commonly use? => What is the difference between null and undefined? => How does JavaScript handle memory management? #JavaScript #TechInterviews #FrontendDevelopment #WebDevelopment #Developers #Programming

🚀 Interview Question That Tests Your JavaScript Fundamentals Here’s a simple-looking question that often confuses even experienced developers: console.log([] == ![]); 👉 What will be the output? Most people expect false, but the answer is actually true 😲 💡 Let’s break it down: ![] → false (Because an empty array is truthy, so NOT makes it false) Now the expression becomes: [] == false During comparison: [] → converted to "" (empty string) false → converted to 0 Now: "" == 0 → true 🔥 Key Takeaway: JavaScript’s loose equality (==) does type coercion, which can lead to unexpected results. 💬 Have you faced similar tricky questions in interviews? Drop them below 👇 #react #javascript #interview #prep #prepration

🚀 Just Created My JavaScript Revision Notes PDF After preparing for interviews, I realized revision takes a lot of time… So I created a short and practical JavaScript revision PDF with key concepts and code snippets. 📌 Topics Covered: ✔️ Closures ✔️ Promises & Async/Await ✔️ call, apply, bind ✔️ Debouncing & Throttling ✔️ this keyword ✔️ And more… 💡 This will help you revise quickly before interviews. 📄 Comment “JS” and I’ll share the PDF OR Download here: https://lnkd.in/dUubAWpx #javascript #reactjs #webdevelopment #frontenddeveloper #interviewprep #100DaysOfCode

Preparing for JavaScript Interviews? Here’s another set of mid level questions: => What is the difference between pass by value and pass by reference in JavaScript? => How does the JavaScript execution context work? => What happens during the creation phase and execution phase? => What is the call stack and how does it relate to the event loop? => What are closures memory implications? Can they cause memory leaks? => What is the difference between shallow comparison and deep comparison in real scenarios? => How does Object.freeze() work and what are its limitations? => What is the difference between synchronous exceptions and async errors? => How does error handling differ in promises vs async/await? => What are symbols in JavaScript and where would you use them? => What is the difference between Map and Object? When would you prefer one over the other? => What is the difference between Set and Array? => How does destructuring work with nested objects? => What are iterators and how are they different from generators? => How does JavaScript handle floating point precision issues? #Follow Shubhangi K.

Master these Top 10 JavaScript coding problems to enhance your problem-solving skills and succeed in technical interviews. Key problems include: - Reversing a string - Checking palindromes - Flattening arrays - Solving anagrams These concepts are essential for every developer, making them perfect for interview preparation, logic building, and strengthening your JavaScript fundamentals. #JavaScript #CodingInterview #DSA #WebDevelopment #Frontend #Backend #ProblemSolving #TechInterview

👉 Grab the PDF here 👇 🔗https://lnkd.in/dUePYuvM Stop Googling the night before your JavaScript interview. This free cheatsheet has everything you need: 📄 20 real interview questions 💻 Real code examples 💬 Simple English answers ⚡ Full cheat sheet at the back 5 topics covered: 🟡 Basics — var, let, const, == vs === 🔵 Functions — closures, arrow functions 🟢 Arrays — map, filter, reduce 🩷 Objects — destructuring, deep copy 🟣 Async JS — Promises, async/await Read it in 30 minutes. Walk into your interview confident. #javascript #interviewtips #javascriptinterview #learntocode #javascriptbeginners #codinginterview

🚀 50 Advanced JavaScript Output-Based Questions (PDF) If you're preparing for frontend or full-stack interviews, one thing that truly tests your understanding is 👉 output-based questions. I’ve compiled 50 advanced JavaScript output-based questions covering: ✔️ Type coercion ✔️ Closures & scope ✔️ Event loop (Promises vs setTimeout) ✔️ Hoisting & TDZ ✔️ "this" keyword behavior ✔️ Arrays & objects quirks ✔️ Edge cases interviewers LOVE These are not just questions — they reflect real interview patterns used in product-based companies. 📄 I’ve put everything into a clean, presentable PDF for easy practice. 💡 Tip: Don’t just guess the output — try to explain WHY. That’s what interviewers look for. If you find this helpful, feel free to: 👍 Like 🔁 Share 💬 Comment “ANSWERS” — I’ll share the detailed explanation PDF next! #JavaScript #FrontendDevelopment #WebDevelopment #InterviewPreparation #ReactJS #CodingInterview #SoftwareEngineering #LearnToCode

🚀 Day 13 of My Frontend Developer Interview Preparation Today I focused on understanding the “this” keyword in JavaScript along with revising some core basics. 🔹 Learned how this behaves differently based on context: In global scope Inside objects Inside regular functions vs arrow functions In event handlers 🔹 Understood that this is not fixed — it depends on how a function is called, which makes it a very important (and sometimes tricky) concept in interviews. 🔹 Also revised key JavaScript fundamentals: Arrays & Objects Shallow vs Deep Copy Destructuring Spread & Rest Operators 💡 The more I learn, the more I realize that strong fundamentals are the real game changer for cracking interviews. Tomorrow’s plan: Practice tricky questions on these topics and strengthen my problem-solving 🚀 #JavaScript #FrontendDevelopment #WebDevelopment #CodingJourney #InterviewPreparation #LearningEveryday

Preparing for JavaScript Interviews? Here’s another set of mid level questions: => What is the difference between pass by value and pass by reference in JavaScript? => How does the JavaScript execution context work? => What happens during the creation phase and execution phase? => What is the call stack and how does it relate to the event loop? => What are closures memory implications? Can they cause memory leaks? => What is the difference between shallow comparison and deep comparison in real scenarios? => How does Object.freeze() work and what are its limitations? => What is the difference between synchronous exceptions and async errors? => How does error handling differ in promises vs async/await? => What are symbols in JavaScript and where would you use them? => What is the difference between Map and Object? When would you prefer one over the other? => What is the difference between Set and Array? => How does destructuring work with nested objects? => What are iterators and how are they different from generators? => How does JavaScript handle floating point precision issues? #JavaScript #TechInterviews #FrontendDevelopment #WebDevelopment #Developers #Programming

One thing that confused me a lot when I started with React - Why does useEffect behave differently each time? 🤔 It all makes sense once you map it to class lifecycle methods. Whether you're learning React or prepping for interviews - this one's for you 👇 🔖 Save this for later. Follow for more. #React #ReactHooks #useEffect #FrontendDevelopment #JavaScript #WebDevelopment #ReactInterview #SoftwareEngineering