I had my first AI interview with Berribot Masterminds. It was divided into two parts: 1. 20 minutes of theory (Based on JavaScript fundamentals and React.js) 2. 20 minutes of programming round • Find GCD of two numbers • Simple useState implementation in a React component It was a great experience interacting with an AI interviewer. There was no pressure of being judged quickly, which made the process feel different and interesting. #ReactJS #JavaScript #Interview

In my last blog, I covered Array Flatten in JavaScript — breaking down how nested data structures work. This time, I focused on something that looks simple… but is heavily tested in interviews — Strings. Most developers use methods like includes(), indexOf(), or startsWith() daily. But very few actually understand how they work internally. And that’s exactly what interviewers care about. In this blog, I’ve covered: • What string methods are • Why developers write polyfills • Step-by-step implementation with logic • Common interview problems (reverse string, palindrome, etc.) • How to think like an interviewer If you're preparing for frontend or JavaScript interviews, this will help you go beyond just syntax. 🔗 Read here: https://lnkd.in/d6iRFr_5 Next blog: The new keyword in JavaScript 👀 Stay consistent and keep grinding.... #javascript #frontenddeveloper #webdevelopment #programming #codinginterview #learninpublic #softwareengineering #reactjs

In my previous blog, I explored String Polyfills and common interview methods — understanding how JavaScript works behind the scenes. Today, I went deeper into another fundamental concept: 👉 The new Keyword in JavaScript At first glance, it looks simple. But internally, it performs multiple steps that directly impact how objects, prototypes, and this behave. In this blog, I covered: ✔️ What the new keyword actually does ✔️ Step-by-step object creation process ✔️ How prototype linking works ✔️ Relationship between constructor and instances ✔️ Common mistakes (like forgetting new) And most importantly 👇 ⚠️ Confusing parts developers often struggle with: Array() vs new Array() Object creation patterns Constructor return behavior If you’re preparing for interviews or want to strengthen your JavaScript fundamentals, this will clear a lot of hidden concepts. 🔗 Read the full blog here: https://lnkd.in/grUGpMqe Next up in the series: JavaScript Modules (import/export) 🚀 #javascript #webdevelopment #frontenddeveloper #programming #softwaredevelopment #coding #100daysofcode #learninpublic

🚀 Day 4/30 — React Machine Coding Challenge Built an Address Form with Pincode Auto-Fill 🧩 What I implemented: - Fields: name, address, city, state, pincode, country - Pincode validation (6-digit, proper format) - Auto-detect city & state using a mock API - Inline field errors + error summary at top 🧠 What I focused on: - Keeping validation simple and clear - Triggering API only when the pincode is valid - Auto-filling dependent fields (city/state) - Showing errors in a way user can easily fix 💡 Key Learning: Good forms are not just about inputs — they are about guiding the user and reducing effort. Now your turn 👇 Try building this and share your approach/code in the comments. I’ll review and give feedback. Following along for frontend interview prep? I’m posting one challenge daily. #30DaysOfCode #ReactJS #MachineCoding #FrontendDevelopment #InterviewPrep #BuildInPublic #JavaScript

🚀 String Polyfills and Common Interview Methods in JavaScript 📖 Read here: https://lnkd.in/ge6Zg_-5 Just published a deep dive into one of the most important JavaScript topics for interviews 💡 In this article, I’ve covered: ✔️ What string methods are ✔️ Why developers write polyfills ✔️ Implementing string utilities ✔️ Common interview problems ✔️ How built-in methods actually work If you're preparing for coding interviews or strengthening your fundamentals, this will help you think like a problem solver. 🙏 Special thanks to the amazing mentors and community: Hitesh Choudhary Sir Piyush Garg Sir Akash Kadlag Sir Suraj Kumar Jha Sir Chai Aur Code #JavaScript #WebDevelopment #FullStackDeveloper #Programming #Coding #Developers #Learning #Tech

🚀 Mastering Recursion in JavaScript: Flattening Arrays Like a Pro One of the most powerful concepts in programming is recursion — and a great way to understand it is by solving real problems. Here’s a clean and practical example: flattening an array of any depth 👇 💡 What’s happening here? We loop through each element If it's an array → we recursively flatten it If not → we push it directly Finally → we combine everything into a single-level array This pattern is 🔥 because it teaches: Recursive thinking Problem decomposition Clean and scalable logic 📚 I’ve been practicing these patterns consistently, and I’ve compiled more exercises here: 👉 https://lnkd.in/ej4fNeZs If you're learning algorithms or preparing for coding interviews, this repo might help you level up 💪 #JavaScript #Recursion #Algorithms #CodingInterview #WebDevelopment #100DaysOfCode

🚀 Day 2 – Crack Interviews Series 🔹 Topic: What is Promise in JavaScript? A Promise is an object that represents the future result of an async operation. 👉 It has 3 states: - Pending ⏳ - Resolved ✅ - Rejected ❌ 💡 Real Example: const fetchData = new Promise((resolve, reject) => { let success = true; if (success) { resolve("Data received"); } else { reject("Error occurred"); } }); fetchData .then((res) => console.log(res)) .catch((err) => console.log(err)); 🎯 Interview Question: Why are Promises better than callbacks? 👉 Answer: - Avoid callback hell - Better error handling with ".catch()" - Cleaner and readable code 💼 Pro Tip: Promises are the base of async/await and modern async programming. 👇 Do you prefer Promises or async/await? #javascript #webdevelopment #nodejs #frontend #interviewprep #coding #developers

In the world of tech interviews, JavaScript questions often come up, and knowing how to navigate them can really set you apart. Here are 10 questions you might encounter: 1. What’s the difference between `==` and `===`? 2. Can you explain event delegation? 3. What are closures, and can you give an example? 4. How does the `this` keyword work in JavaScript? 5. What is a promise, and how do you use it? 6. Can you explain asynchronous programming in JavaScript? 7. What’s the purpose of `bind()`, `call()`, and `apply()`? 8. How do you handle errors in JavaScript? 9. What are arrow functions, and how do they differ from regular functions? 10. Can you explain the concept of hoisting? Practice answering these with real-world examples, and you'll be in great shape! #JavaScript #TechInterviews #Coding #WebDevelopment #ProgrammingTips

OTP Input: React Machine Coding Round Interview Challenge Project 😎 Date: 16/4/2026 Today, I worked on the OTP Input challenge. After looking at this project, I initially thought, 👉 “This is very easy—why is this challenge in the hard category?” So, I decided to build it. 🤔 While working on the project, I realized why it is considered a hard challenge—because your React fundamentals need to be very strong. 💡 I spent almost 3 hours building this project. Around 90% of the project I completed on my own, and I took about 10% guidance from AI. 😊 To build this project, I used: 👉 Keyboard event listeners (for navigation) 👉 Basics of regex 👉 Practice with useRef and useState hooks Try it ! GitHub Repo: https://lnkd.in/gHkzGfwZ #heycoderji #ReactJS #MachineCoding #FrontendDevelopment #CodingInterview #100DaysOfCode #JavaScript #Developers #Projects

🚀 Solved an important JavaScript Array Problem: Find Duplicate Elements in an Array 📝 Question: Given an array of numbers, identify all duplicate values and return them only once. ✅ Example Input: [1, 2, 3, 4, 3, 2, 5, 6, 7, 8, 8] ✅ Output: [2, 3, 8] 💡 Approach Used: First sorted the array in ascending order Compared adjacent elements Stored duplicates only once using includes() This type of question is frequently asked in coding interviews and helps improve: ✔ Array Manipulation ✔ Sorting Concepts ✔ Loop Logic ✔ Duplicate Detection ✔ Problem Solving Skills Consistency in solving DSA problems daily makes coding logic stronger. 💯 #JavaScript #JS #ArrayProblems #FindDuplicates #CodingChallenge #DSA #Programming #WebDevelopment #FrontendDeveloper #Developer #SoftwareEngineer #Tech #LearnToCode #InterviewPreparation #ProblemSolving #100DaysOfCode #JavaScriptDeveloper #CodeDaily #LinkedInCoding #SortingAlgorithm