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🚀 Learning Update | Frontend Improvements & Interview Prep Here’s what I worked on recently: 🔹 Frontend Enhancement Made the Sidebar and Header components globally accessible across the application, improving consistency and reusability. 🔹 Interview Preparation Prepared for MERN stack interviews, focusing on strengthening core concepts and practical understanding. 🔹 Mock Interview 🎯 Completed an AI mock interview and scored 7.4, gaining insights on areas to improve further. 🔹 Communication Improvement Continued reading The Power of Subconscious Mind to enhance clarity and communication 🧠 Focused on improving both technical skills and interview readiness step by step. #MERN #ReactJS #InterviewPrep #WebDevelopment #LearningInPublic #GrowthMindset

Cracking the "Take or No-Take" Pattern in Technical Interviews!! I recently had a deep-dive technical discussion during an interview with Tekion Corp, and it reminded me why mastering fundamental recursion patterns is a superpower for any Senior Engineer. We tackled a problem that centered around the "Take or No-Take" (Inclusion-Exclusion) approach. It’s one of those "aha!" moments in DSA that transforms how you look at combinatorial problems, like the 0/1 Knapsack or finding subsets. The Concept in a Nutshell: When you’re traversing an array or a set of choices, at every single element, you have two distinct paths: * Take it: Include the element in your current solution and move to the next index with a modified state. * No-Take it: Skip the element entirely and move to the next index with the state remains unchanged. Why this matters for Senior Devs: While we often use high-level abstractions in our daily React or Node.js work, understanding this pattern is about Decision Trees. It’s the foundation for Dynamic Programming (Memoization). It helps in optimizing complex UI state transitions where multiple configurations are possible. It sharpens your ability to reason about Time Complexity ($2^n$ vs $n^2$ with memoization). The Implementation Secret: The beauty lies in the base case. If you handle your index === length condition correctly, the recursion naturally explores every possible combination without redundant logic. Huge thanks to the Tekion team for the stimulating conversation! It’s always a blast to get under the hood of problem-solving logic. How do you usually approach recursion? Do you prefer the iterative path, or are you a fan of the elegance of a recursive decision tree? Let’s discuss in the comments! #SoftwareEngineering #DataStructures #Algorithms #Tekion #Recursion #CodingInterview #SeniorDeveloper #Javascript

🚀 Classic interview problem: Create a Queue Using Two Stacks A queue is FIFO. A stack is LIFO. So how do we make one behave like the other? Use two stacks: class Queue { constructor() { this.inbox = []; this.outbox = []; } enqueue(item) { this.inbox.push(item); } dequeue() { if (!this.outbox.length) { while (this.inbox.length) { this.outbox.push(this.inbox.pop()); } } return this.outbox.pop(); } get size() { return this.inbox.length + this.outbox.length; } } The trick is to push new items into inbox. When it’s time to dequeue, move everything into outbox, reversing the order so the oldest item comes out first. ✅ Enqueue: O(1) ✅ Dequeue: O(1) amortized ⚠️ Worst-case dequeue: O(n) when transferring items 💡 Constraints like this are where real understanding kicks in. 👀 Coming soon: I’ll share how to build a queue using just one stack (yes, it’s possible - and a bit mind-bending). #JavaScript #DataStructures #Algorithms #CodingInterview #SoftwareEngineering

🚀 Higher-Order Function (HOF) — Easy Explanation for Interview Many people use HOF in ****, but cannot explain it simply in interview 😅 Let’s make it super easy 👇 --- 🎯 Simple Definition (say this in interview): 👉 A Higher-Order Function is a function that: ✔ takes another function as input OR ✔ returns a function --- 🧠 Why we use it? ✔ Code reuse ✔ Clean code ✔ Easy to manage logic --- ⚙️ Simple Example function greet(name) { return "Hello " + name; } function processUser(callback) { return callback("Prem"); } processUser(greet); 👉 "processUser" is HOF (because it takes function) --- 🔁 Return Function Example function multiply(x) { return function (y) { return x * y; }; } const double = multiply(2); double(5); // 10 👉 "multiply" is HOF (because it returns function) --- 🔥 Real-Life Example (important) function withLogger(fn) { return function (...args) { console.log("Input:", args); const result = fn(...args); console.log("Output:", result); return result; }; } 👉 Used for: - Logging - Error handling --- ⚛️ React Example function withAuth(Component) { return function () { const isLoggedIn = true; return isLoggedIn ? <Component /> : <h1>Login Required</h1>; }; } --- 💬 Best Interview Answer (simple) 👉 "A Higher-Order Function is a function that takes another function or returns a function. I use it to reuse logic like logging, auth, and clean code structure." --- #JavaScript #ReactJS #InterviewPrep #Frontend #Coding

🏁 I just finished watching an interview simulation by Sheryians Coding School and Sarthak Sharma, and honestly, it was a massive reality check. I realised something uncomfortable but powerful. Anyone today can prompt AI to write code. But a real developer is the one who understands what’s happening under the hood. That depth is what interviews are truly testing. Here’s the pattern I noticed in a real Frontend interview 👇 ✒️ JS Basics-> It starts simple with var, let, const. But interviewers are not looking for surface-level answers. They expect clarity, precision, and professional terminology like Temporal Dead Zone, scope, and hoisting. ✒️ Internal Working-> This is where most candidates struggle. If you cannot clearly explain Execution Context, Call Stack, or Closures, then your understanding is incomplete. Writing code without knowing how it runs is a big gap. ✒️ Async JavaScript-> This is the real separator. Event Loop, Microtasks, Macrotasks, Promises, Callbacks. This is where you can instantly tell who has depth and who has just practiced syntax. The biggest lesson for me 🧠 It’s not just about giving the #right answer. It’s about how you communicate it. The structure, the terminology, the confidence in explaining concepts step by step. After #watching this, I’ve started shifting my focus. Less “just coding” More “understanding deeply” Because at the end of the day, #companies don’t hire people who can copy solutions. They hire people who can think, explain, and build with clarity. If you want to experience what a real interview environment feels like and understand the gap between learning and mastery, I highly #recommend watching this: https://lnkd.in/gkKaSSmW Massive respect to Sheryians Coding School Community for creating content that actually prepares developers for the real world and not just tutorials. 🧑💻 #FrontendDevelopment #JavaScript #WebDevelopment #CodingInterview #LearningJourney #SheryiansCodingSchool

Code is easy, but concepts are the real filter. Just watched a solid interview simulation by Sheryians Coding School, and it was a massive reality check. In the age of AI prompts, the real winners are those who actually understand what’s happening "under the hood." The 3-Step Reality Check: 1️⃣ JS Basics: It’s not just let/const; it’s the Temporal Dead Zone. 2️⃣ The Core: If you don’t get Execution Context or Closures, you don’t know JS. 3️⃣ The Final Boss: Mastering the Event Loop separates the seniors from the juniors. The lesson? It’s not just about the answer - it’s about your technical depth and how you structure your thoughts. Watch the full simulation here: https://lnkd.in/gNE974K6 Credit: https://lnkd.in/gbZ4CBWS by Sarthak Sharma Credit: Sheryians Coding School & #JavaScript #Frontend #InterviewPrep #WebDev #IndiaTech

🚨 Can you solve this without using Math.max()? Find the largest number in an array 👇 👉 [3, 7, 2, 9, 5] → 9 Most developers jump straight to Math.max(). But in interviews, that’s not enough. 💡 Method 1: Math.max(...arr) → quick & clean 💡 Method 2: Loop and track the max value 🔥 What interviewers actually test: Your logic, not shortcuts. ⚠️ Important: Always handle the empty array edge case 👉 Pro tip: Start with the first element (not 0 — breaks for negative numbers) Small details = big difference in interviews. Can you write both without help? 👇 Save this for interviews 🚀 #JavaScript #CodingInterview #Frontend #Developers #InterviewPrep

𝗢𝘂𝘁 𝗼𝗳 𝗲𝘃𝗲𝗿𝘆𝘁𝗵𝗶𝗻𝗴 𝗜 𝗽𝗿𝗲𝗽𝗮𝗿𝗲𝗱 𝗳𝗼𝗿 𝗶𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄𝘀, 𝘁𝗵𝗶𝘀 𝗼𝗻𝗲 𝗳𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗾𝘂𝗲𝘀𝘁𝗶𝗼𝗻 𝗰𝗮𝘂𝗴𝗵𝘁 𝗺𝗲 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲𝗹𝘆 𝗼𝗳𝗳 𝗴𝘂𝗮𝗿𝗱.... ASKED: "𝗪𝗵𝗮𝘁 𝗶𝘀 𝗮 𝗽𝘂𝗿𝗲 𝗳𝘂𝗻𝗰𝘁𝗶𝗼𝗻, 𝗮𝗻𝗱 𝗵𝗼𝘄 𝗱𝗼𝗲𝘀 𝗶𝘁 𝗱𝗶𝗳𝗳𝗲𝗿 𝗳𝗿𝗼𝗺 𝗮 𝗳𝘂𝗻𝗰𝘁𝗶𝗼𝗻 𝘄𝗶𝘁𝗵 𝘀𝗶𝗱𝗲 𝗲𝗳𝗳𝗲𝗰𝘁𝘀?" Me: "A pure function returns the same output for the same input." Interviewer: "Is Math.random() a pure function?" Me: "No, it returns different values." Interviewer: "What about a function that reads from a database but always returns the same result for the same ID?" Me: "Um... yes?" Interviewer: "What if the database value changes?" I got froze!!! 𝗣𝘂𝗿𝗲 𝗳𝘂𝗻𝗰𝘁𝗶𝗼𝗻𝘀 : They're the foundation of React's rendering model, Redux's predictability, functional programming patterns, and testable code. 𝗧𝗵𝗲 𝘁𝗵𝗿𝗲𝗲 𝘁𝗲𝘀𝘁𝘀 𝘁𝗵𝗮𝘁 𝗱𝗲𝗳𝗶𝗻𝗲 𝗽𝘂𝗿𝗶𝘁𝘆: 𝟭) 𝗗𝗲𝘁𝗲𝗿𝗺𝗶𝗻𝗶𝘀𝘁𝗶𝗰 𝗼𝘂𝘁𝗽𝘂𝘁 → Same input = same output (no random, time, API) 𝟮) 𝗡𝗼 𝗲𝘅𝘁𝗲𝗿𝗻𝗮𝗹 𝗱𝗲𝗽𝗲𝗻𝗱𝗲𝗻𝗰𝗶𝗲𝘀 → Depends only on its inputs (no globals, DOM, state) 𝟯) 𝗡𝗼 𝘀𝗶𝗱𝗲 𝗲𝗳𝗳𝗲𝗰𝘁𝘀 → Doesn’t modify anything outside (no mutations, no I/O) 𝗪𝗵𝘆 𝘁𝗵𝗶𝘀 𝗺𝗮𝘁𝘁𝗲𝗿𝘀 𝗳𝗼𝗿 𝗥𝗲𝗮𝗰𝘁: React assumes components are pure → same input = same output 𝗘𝗻𝗮𝗯𝗹𝗲𝘀: • Skipping unnecessary re-renders • Safe multiple renders (Strict Mode, concurrent) • Flexible rendering & discarding 𝗣𝘂𝗿𝗶𝘁𝘆 = 𝗽𝗿𝗲𝗱𝗶𝗰𝘁𝗮𝗯𝗹𝗲 + 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝘁 𝗥𝗲𝗮𝗰𝘁 𝗧𝗵𝗲 𝗜𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄-𝗪𝗶𝗻𝗻𝗶𝗻𝗴 𝗔𝗻𝘀𝘄𝗲𝗿: "A pure function is deterministic (same input → same output) and has no side effects. In React, components should be pure because React may render them multiple times. Side effects inside render cause bugs, so they belong in useEffect." 𝗕𝗲𝗻𝗲𝗳𝗶𝘁𝘀: → Same items + same taxRate = always same result → Easy to test (just pass values) → Can memoize results for performance → Can safely call multiple times → Predictable, debuggable, maintainable 𝗥𝗲𝘀𝘂𝗹𝘁: calculateTotal(cartItems, 0.08) can be called anywhere, anytime. Guaranteed same result. 𝗡𝗼𝘄 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄 𝘄𝗵𝘆 𝗥𝗲𝗮𝗰𝘁 𝘄𝗮𝗻𝘁𝘀 𝗽𝘂𝗿𝗲 𝗰𝗼𝗺𝗽𝗼𝗻𝗲𝗻𝘁𝘀! Learn these fundamentals deeply and you won’t just clear interviews… you’ll get hired. Link in comments👇

🚨 Can you solve this without using Math.max()? Find the largest number in an array 👇 👉 [3, 7, 2, 9, 5] → 9 Most developers jump straight to Math.max(). But in interviews, that’s not enough. 💡 Method 1: Math.max(...arr) → quick & clean 💡 Method 2: Loop and track the max value 🔥 What interviewers actually test: Your logic, not shortcuts. ⚠️ Important: Always handle the empty array edge case 👉 Pro tip: Start with the first element (not 0 — breaks for negative numbers) Small details = big difference in interviews. Can you write both without help? 👇 Save this for interviews 🚀 #JavaScript #CodingInterview #Frontend #Developers #InterviewPrep #js #intervieswibe

Most developers start learning system design only when interviews force them to. That is usually too late. System design is not just an interview topic. It is what helps you build applications that can handle real users, real traffic, and real growth. I published a new blog on: System Design for Developers: Questions, Framework, and Mistakes to Avoid In this post, I break down: • what system design actually means in simple words • common system design questions developers should practice • a practical framework to approach any design problem • mistakes developers make while designing systems • how to think beyond code and start thinking in architecture I wrote this to make system design easier to understand for developers who want practical clarity, not unnecessary complexity. If you are a student, full-stack developer, backend developer, or preparing for interviews, this will help you build stronger technical thinking. Read here: https://lnkd.in/dW3yTpNx Would love to know: Which system design problem do you find most difficult to approach? #SystemDesign #SoftwareArchitecture #BackendDevelopment #FullStackDevelopment #MERN #WebDevelopment #Developer #Coding #TechBlog #TheCampusCoders