Remove Array Duplicates with JavaScript

Day 15: 5 JavaScript Interview Questions 🚀 Description: These JavaScript interview questions are designed to check your core fundamentals, not just syntax. If you clearly understand concepts like scope, comparison, and events, you can easily crack beginner to mid-level JS interviews. Try answering each question yourself before checking any reference—this builds real confidence. Questions: 1️⃣ What is the difference between var, let, and const in JavaScript? 2️⃣ What is a closure in JavaScript? 3️⃣ What is the difference between == and ===? 4️⃣ What is event bubbling in JavaScript? 5️⃣ What is the difference between undefined and null? Hashtags: #JavaScript #JSInterview #FrontendDeveloper #WebDevelopment #CodingInterview #LearnJavaScript #DeveloperTips #Day15

What is the difference between " == " and " === " in JS ⚠ Never attend an interview without knowing this 🔽 Interview Prep - EP2 📌 Learn the difference between " == " and " === " using this JavaScript Notebook brought to you by Scribbler - https://lnkd.in/gay4nPXC Do check out and then proceed further ✋ 📌 Understanding the nuances between '==' and '===' empowers you to write robust, reliable JavaScript code and ace the interview as well. Different code snippets are attached along with simple explanation in the below carousel ⬇ Don't miss it. Interviews are incomplete without this question. So learn it now with help of Scribbler. Do repost and comment if you like this interview prep series. Help us reach more people by commenting 👇🏼 and reposting 🔄 . Learn the basics of JS from JavaScript Mastery and W3Schools.com Follow Scribbler.Live to explore more in JavaScript Share this with a friend who might find it useful #JustScribble

🚀 #Day4 – Quick JavaScript Interview Challenge Sharing another quick JavaScript logic challenge as part of my daily interview prep series. This one focuses on operator precedence, logical operators, and type coercion — topics that often confuse developers during interviews. If you want to check the correct answer with a clear step-by-step explanation, you can find it here: https://lnkd.in/gRddVyQG Drop your thoughts in the comments once you’ve figured it out. #javascript #frontend #webdevelopment #interviewprep #codingchallenge #learnjavascript #developers

🚀 Launching a JavaScript Interview Prep Series : CodeBreak JS Interview Prep I’m starting a JavaScript Interview Prep series covering all important JS concepts from basics → advanced, one topic at a time. 🎥 Short videos will be posted on YouTube & Instagram 📊 Detailed explanations will be shared here as LinkedIn carousels 🎯 What this series focuses on: JS concepts interviewers actually ask Short and Precise Quick revision you can come back to anytime Clean, no-fluff explanations I’ll be posting regularly. If you’re preparing for interviews or revising JavaScript fundamentals, stay tuned. Let’s CodeBreak it down — together. 💻✨ #JavaScript #JavaScriptInterview #FrontendDevelopment #WebDevelopment #CodingInterviews #DeveloperGrowth #LearnJavaScript #CodebreakDev #CodeBreakJSInterviewPrep

JavaScript interview question that sounds simple — but isn’t: What’s the difference between null, undefined, and NaN? In interviews, clarity matters: null → intentional absence of value undefined → declared but not assigned NaN → invalid number result Even experienced developers get tripped up by: typeof null === "object" NaN === NaN // false This short breaks it down clearly, practically, and interview-first. 👉 If NaN still feels weird, I’ve linked a related breakdown that explains why NaN doesn’t equal itself. #JavaScript #InterviewPreparation #SoftwareEngineering #FrontendDevelopment #WebDevelopment #CodingInterviews #JavaScriptTips #DeveloperLearning #CodebreakDev

Most developers think they understand JavaScript hoisting. Until an interview proves otherwise. This single concept confuses developers, breaks confidence, and leads to ‘I knew this, but…’ moments So I recorded a deep dive on JavaScript Hoisting. Not just what it is, but why interview answers go wrong and how JS actually behaves under the hood. If you’re preparing for frontend interviews, this one is worth revisiting. Full video link in comments Did hoisting ever trip you up in an interview?

🚨 JavaScript Interview Experience 🚨 Recently, I encountered two deceptively simple JavaScript questions during an interview. Many developers write this code daily, but few can explain why it behaves this way: - Automatic Semicolon Insertion - Pre vs Post Increment Interviews don’t just test what you write; they assess how well you understand execution. I'm sharing this to assist fellow developers preparing for frontend and full-stack interviews. #JavaScript #FrontendInterview #FullStackDeveloper #WebDevelopment #InterviewPreparation #JavaScriptTips #CodingInterview #ReactJS #NodeJS #SoftwareEngineering #LearnJavaScript #DeveloperCommunity

🔍 Interview Time! 🔍 If you feel you know splice() and slice(), then you might be mistaken. These two JavaScript array methods look simple… but interviewers use them to expose depth (or the lack of it). In real interviews, I’ve seen candidates stumble when asked: Which one mutates the original array? Which one returns a new array? Can splice() be used for insert, delete, and replace? Why is slice() preferred in immutability-focused frameworks like React? What happens when negative indexes are used? 👉 This is exactly where interviewers make you vulnerable. Understanding splice() and slice() is not about syntax — it’s about: Memory behavior Side effects Immutability Real-world debugging scenarios I’ve documented practical interview traps, edge cases, and real examples in my latest blog (notes already prepared 📘). If you’re preparing for JavaScript interviews, don’t underestimate these “basic” methods — they are power tools in disguise. #JavaScript #FrontendInterviews #WebDevelopment #JavaScriptInterview #CodingInterview #LearningInPublic #DeveloperMindset #InterviewPreparation #JSArrays #SoftwareEngineering #TechElliptica #VaibhavSingh

💼Deep vs Shallow Copy This question appears in 70%+ of JavaScript interviews. Here's what you need to know: What interviewers want to hear: ✓ Clear explanation of the difference ✓ Code examples demonstrating the concept ✓ Knowledge of multiple copying methods ✓ Understanding of performance implications ✓ Awareness of JSON method limitations - Shallow copy = Reference sharing for nested objects - Deep copy = Complete independence Choose based on your use case, not just "deep is better" Just created a comprehensive guide with: Theory explanations Code examples Common pitfalls Use cases Interview tips Perfect for interview prep or leveling up your JavaScript skills! Bookmark this for your next interview. Good luck! #InterviewPrep #JavaScript #CareerGrowth #TechInterviews #Angular #SoftwareDevelopment #FrontendDev #CodingInterview

🚀 React Interview Prep | Debounce & Throttle (Hands-on) Recently, I solved a React mock interview question asked by Anurag Singh (ProCodrr – YouTube), focused on implementing Debounce and Throttle from scratch using React Hooks. 💡 What I implemented: Normal click handling Debounce logic using useCallback and useRef Throttle logic using useCallback and useRef Practical comparison of how each behaves on rapid clicks 🧠 Key Learnings: How closures work inside debounce/throttle Why useRef is preferred over useState for mutable values When to use debounce vs throttle in real-world applications This exercise helped me deeply understand performance optimization patterns in React — something interviewers often look for beyond theory. Huge shout-out to Anurag Singh bhai for creating such mock interviews on YouTube. They are extremely helpful for interview preparation 🙌 #ReactJS #JavaScript #FrontendDevelopment #WebPerformance #Debounce #Throttle #ReactHooks #InterviewPreparation #LearningByBuilding