Anis Rahman’s Post

🚀 Why JavaScript Output-Based Questions Are Important Many developers skip JavaScript output-based questions thinking they are just tricky interview puzzles. But in reality, they build a deeper understanding of how JavaScript actually works. Here’s why they matter: 🚀 Strengthens Core JavaScript Fundamentals 🧠 Improves Logical Thinking 🐞 Enhances Debugging Skills ⚙️ Helps Understand JavaScript Internals 💼 Prepares You for Technical Interviews 📈 Builds Problem-Solving Ability 🔍 Encourages Deep Code Understanding 💡 Makes You a Better JavaScript Developer Strong fundamentals in JavaScript turn you from someone who writes code into someone who truly understands code. 💻✨ #JavaScript #WebDevelopment #Frontend #Programming #CodingInterview #Developers #100DaysOfCode

🚀 New Blog Alert for JavaScript Developers! Understanding this in JavaScript can feel like magic — until you truly get how call(), apply(), and bind() work. In this article, I break down these powerful concepts with simple explanations and practical examples you can actually use in real projects. 💡 👉 Read here: https://lnkd.in/dzxnYAqM If you’re learning JavaScript or preparing for interviews, this is a must-read! 🔥 Feedback and discussions are welcome 🙌 #JavaScript #WebDevelopment #Frontend #Coding #100DaysOfCode #LearnToCode

🧠 Closures in JavaScript — The Concept That Unlocks Real Engineering Power 🚀 Most developers can use closures. Few can confidently explain them in interviews. A closure happens when a function remembers variables from its outer scope — even after that outer function has finished executing. That’s not just theory. Closures power: • Data privacy • Function factories • Callbacks • Memoization • State management • Event handlers • Async logic Example in simple terms: A function carries its lexical environment with it. That’s why counters work. That’s why private variables exist. That’s why higher-order functions are powerful. In interviews, closures test: 🔹 Scope understanding 🔹 Memory behavior 🔹 Execution context 🔹 JavaScript fundamentals Frameworks change. Closures don’t. If you truly understand closures, you understand how JavaScript thinks. #JavaScript #Closures #FrontendDevelopment #WebDevelopment #SoftwareEngineering #Programming #NodeJS #ReactJS #CodingInterview #FullStackDeveloper #TechCareers

“Can you give an example of when #TypeScript was more useful than #JavaScript in a coding task?” - was the question I was asked at an interview this morning. It’s one of those questions that sounds simple, but it made me realise that building software and explaining how you build it are two different things. A clear example is working with API responses. With JavaScript, you only discover issues when the code runs. If the response structure changes or a property is missing, the error appears at runtime. With TypeScript, you define the expected structure of the data. The compiler then warns you immediately if something doesn’t match or if you try to access a property that doesn’t exist. The logic of the program doesn’t change, but TypeScript moves many mistakes from runtime to development time, which becomes increasingly valuable as projects grow. A good reminder for #JuniorDevelopers preparing for interviews: practice building, but also practice articulating the reasoning behind your technical choices. #typescript #javascript #softwareengineering #learninginpublic #juniorsoftwaredevelopers

JavaScript Interview Series – Chapter 11: Asynchronous JavaScript I’m sharing my JavaScript Interview Preparation Guide chapter by chapter to help developers strengthen their fundamentals. Today’s topic: Asynchronous JavaScript 📘 The complete JavaScript guide includes: ✔️ 19 Chapters ✔️ 180+ Topics ✔️ 150+ Interview Questions ✔️ 50+ Coding Challenges ✔️ Polyfills + Machine Coding 💬 Comment or DM me “Notes” to get the COMPLETE notes of other tech. Or visit: 🌐 www.syedshaazakhtar.in You can also find notes on React JS, Next JS, Node JS, TypeScript, DSA, System Design, Microservices, GenAI, and more. Let’s keep learning and growing together 🚀 #javascript #webdevelopment #frontenddeveloper #softwareengineering #codinginterview #techlearning #programminglife #developers

JavaScript Interview Series – Chapter 14: OOP in JS I’m sharing my JavaScript Interview Preparation Guide chapter by chapter to help developers strengthen their fundamentals. Today’s topic: OOP in JS 📘 The complete JavaScript guide includes: ✔️ 19 Chapters ✔️ 180+ Topics ✔️ 150+ Interview Questions ✔️ 50+ Coding Challenges ✔️ Polyfills + Machine Coding 💬 Comment or DM me “Notes” to get the COMPLETE notes of other tech. Or visit: 🌐 www.syedshaazakhtar.in You can also find notes on React JS, Next JS, Node JS, TypeScript, DSA, System Design, Microservices, GenAI, and more. Let’s keep learning and growing together 🚀 #javascript #webdevelopment #frontenddeveloper #softwareengineering #codinginterview #techlearning #programminglife

💡 JavaScript Interview Trap – Do You Know the Difference? Many beginners (and even some experienced devs) get confused between: 👉 let, var, const Understanding this can save you in interviews and real projects. 🚀 --- 🔹 1️⃣ var Function scoped Can be re-declared Can be updated Gets hoisted (initialized as undefined) Can cause unexpected bugs var x = 10; var x = 20; // ✅ allowed --- 🔹 2️⃣ let Block scoped Cannot be re-declared in same scope Can be updated Hoisted but not initialized (Temporal Dead Zone) let y = 10; y = 20; // ✅ allowed // let y = 30; ❌ error --- 🔹 3️⃣ const Block scoped Cannot be re-declared Cannot be updated Must be initialized at declaration const z = 10; // z = 20; ❌ error ⚠️ Important: For objects & arrays declared with const, you can modify properties, but you cannot reassign the variable. --- 🔥 Pro Tip: Use const by default. Use let when you know value will change. Avoid var in modern JavaScript. --- If this helped, comment “JS” and I’ll share more quick JavaScript interview tricks 🚀 #JavaScript #WebDevelopment #Frontend #Coding #Programming #Developers #TechCareers

🚀 JavaScript Fundamentals Cheat Sheet I recently compiled a JavaScript notes guide from basic to advanced concepts to strengthen core fundamentals. Here are some key concepts every developer should know: 📌 JavaScript Variables - var (function scoped) - let (block scoped) - const (immutable) 📌 Data Types - String - Number - Boolean - Null - Undefined - Symbol - BigInt 📌 Control Structures - if / else - switch case 📌 Loops - for - while - do while - for...in - for...of 📌 Functions - Function declaration - Function expression - Arrow functions 📌 Scope - Global scope - Function scope - Block scope Strong fundamentals in JavaScript make it much easier to understand frameworks like Node.js, Vue.js, and modern frontend architecture. If you're learning JavaScript or preparing for interviews, mastering these basics is extremely important. #javascript #webdevelopment #nodejs #frontend #programming

🚨 Most Developers Get These JavaScript Questions Wrong! JavaScript looks easy… until interviewers ask these. Let’s test your fundamentals 👇 🧠 Question 1 console.log(a); var a = 10; A) 10 B) undefined C) ReferenceError --- ⚡ Question 2 console.log(a); let a = 10; A) undefined B) 10 C) ReferenceError --- 🔥 Question 3 hello(); var hello = function(){ console.log("Hi"); } A) Hi B) undefined C) TypeError --- 💡 Question 4 function test(){ console.log(a); var a = 10; } test(); A) 10 B) undefined C) ReferenceError --- 🚀 Question 5 var a = 5; (function(){ console.log(a); var a = 10; })(); A) 5 B) 10 C) undefined --- These questions test your understanding of: ✨ Hoisting ✨ Scope ✨ Function Expressions ✨ Temporal Dead Zone ✨ IIFE 💬 Drop your answers (1–5) in the comments. Let’s see how many developers get all of them right! #javascript #webdevelopment #frontenddeveloper #webdeveloper #programming #softwaredeveloper #coding #developercommunity #devcommunity #learninpublic #100daysofcode #tech #codinginterview #softwareengineering

5 Advanced JavaScript Interview Questions Every Developer Should Know 🚀 JavaScript interviews often go beyond the basics. Understanding core concepts helps you write cleaner, scalable, and more efficient code. Here are 5 important JavaScript questions every developer should know: 1️⃣ What are Closures in JavaScript? A closure occurs when a function remembers variables from its outer scope, even after the outer function has finished executing. 2️⃣ What is the Event Loop? The Event Loop allows JavaScript to handle asynchronous operations (API calls, timers, promises) by managing the call stack and callback queue. 3️⃣ Difference between == and ===? • == → Compares values after type conversion • === → Strict comparison (value + type) 4️⃣ What is Hoisting? Hoisting means variable and function declarations are moved to the top of their scope during the compilation phase. 5️⃣ What are Promises? Promises are used to handle asynchronous operations and have three states: Pending → Fulfilled → Rejected 💡 Mastering these concepts helps developers build scalable and reliable applications. #JavaScript #WebDevelopment #Frontend #Programming #CodingInterview #Developers