How to Prepare for Coding Tests and Technical Rounds

The code isn’t the company. The customer is. Many founders fall in love with the code, the architecture, the stack, the cleverness of what they’re building. They pour months or years into perfecting something elegant, scalable, and efficient. But no matter how good the code is, it doesn’t create value on its own. Code only matters when it connects to a problem that matters. A company isn’t built on syntax; it’s built on empathy, validation, and the discipline of understanding who you’re serving and why. Without that, every technical milestone becomes an isolated achievement, impressive, but irrelevant. The best engineers aren’t just builders; they’re translators. They take human problems and express them in logic. They understand that their real job isn’t to write software, but to make solutions tangible. This is what I mean by “clarity before code.” Every successful product begins with alignment, between the people building it and the people who will depend on it. The code is the vehicle, not the destination.

Too many candidates can give the perfect explanation of closure but cannot debug a simple closure-related problem. That’s the difference between knowing JavaScript and understanding it. Reading notes and watching tutorials will only get you halfway there. If you want to actually grow as a developer, you need to see those concepts in action. Stop reading notes. Start writing code. Create small problems for yourself and break them. Watch what happens when variables go out of scope, when async code overlaps, when closures retain state incorrectly. That’s how real understanding builds, not from memorization, but from experimentation. Once I started doing that, even complex interview questions felt simpler. Because I had seen those mistakes before. 👉✅️ Grab the resource here https://lnkd.in/g9hdUJkf 📘 Frontend Interview Blueprint I built it around that same idea: learning by connection, not memorization. It’s a single, cohesive resource for interview based questions. ✅️ 300+ JavaScript & React questions (70% coding questions) ✅️ 60 system design questions (HLD + LLD) to sharpen your architecture thinking. If you’re preparing, don’t just read. Practice with intention.

Promises: Your Code’s Trusty Delivery Service 🚚 Hey, code crew! Let’s demystify Promises in JavaScript—your go-to for handling async tasks without losing your sanity. Think of me as your senior dev buddy, breaking it down with a burger delivery analogy and a sprinkle of humor, all while keeping it clear and deep. Imagine ordering a burger. You don’t hover over the chef (that’s blocking). You get a receipt—a Promise—that says your food’s coming (or not). It’s pending while cooking, fulfilled when your burger arrives, or rejected if they burn it. Promises let you kick back and do other things while waiting for async stuff like API calls or file reads. Here’s a Promise in action: const orderBurger = new Promise((resolve, reject) => { setTimeout(() => { const success = true; if (success) resolve("🍔 Burger delivered!"); else reject("😢 Kitchen fire, no burger."); }, 2000); }); orderBurger .then((result) => console.log(result)) .catch((error) => console.log(error)); This logs 🍔 Burger delivered! after 2 seconds. .then handles success, .catch handles failure. Before Promises, we had callback hell—nested callbacks like ordering a burger, then fries, then a drink. Promises chain cleanly: orderBurger .then((burger) => { console.log(burger); return new Promise((resolve) => resolve("🍟 Fries delivered!")); }) .then((fries) => console.log(fries)) .catch((error) => console.log(error)); Even better, use async/await for readability: async function getMeal() { try { const burger = await orderBurger; console.log(burger); const fries = await new Promise((resolve) => resolve("🍟 Fries delivered!")); console.log(fries); } catch (error) { console.log(error); } } getMeal(); Promises are the backbone of fetching APIs or handling user inputs. But watch out: forgetting .catch or try/catch is like ignoring a missing delivery—errors slip through quietly. Also, don’t create unnecessary Promises; reuse existing ones to keep things lean. Want more async tips or tricks to level up your JavaScript game? Subscribe to my newsletter at https://lnkd.in/dcsDN7_y for weekly insights, or grab my free eBook at https://lnkd.in/d64MhyMr to master clean coding. Got a Promise horror story or a question? Drop it in the comments—I’m ready to geek out! 🚀

💥 “The code works… but the company’s dying.” 😬 I’ve seen it happen. Fast code. No structure. No naming rules. No architecture. Everything “works”… until one small fix breaks ten other things. Deadlines slip. New devs get lost. The team burns out. And the company pays for it later — rewriting everything from scratch. Clean code isn’t a luxury — it’s survival. “Bad code costs more than good code ever will. 😂 For the vibe coders: If you think “clean code” means wiping your keyboard after work… It’s not hygiene, it’s architecture. 😂 #Flutter #CleanCode #DevelopersLife #SoftwareDevelopment

Everyone wants to crack a Product Based Company. But very few actually know how to prepare for one. When you talk to engineers earning 40–50 LPA, they don’t just know React. They understand how React thinks. Because PBC interviews don’t ask, “What is useEffect?” They ask, “Why does your component re-render even when the data hasn’t changed?” “How would you structure a large-scale dashboard with multiple async widgets?” “Can you build a file explorer with lazy-loaded nested folders?” That’s what separates tutorial knowledge from engineering depth. Here’s how the best candidates prepare 👇 1️⃣ They don’t memorize answers. They build intuition around JSX, props, hooks, and rendering. 2️⃣ They practice reasoning. They don’t just use useMemo, they explain why it exists. 3️⃣ They build muscle memory. Machine coding challenges like accordions, dashboards, and Kanban boards teach more than 10 blog posts ever will. 4️⃣ They simulate the interview. They explain concepts out loud. Because confidence is just clarity practiced aloud. 📘 That’s exactly why I created the ReactJS Interview Blueprint: 200 handpicked questions that mirror how PBCs test engineers. 150 conceptual + 50 machine coding problems designed for real interview flow, not random lists. If your goal this year is to land that 40–50 LPA frontend role, start by mastering how React thinks. 👉 https://lnkd.in/gb2GENpu

🚫 Developers, it’s time to break the screenshot habit. One small behavior is quietly undermining how we share knowledge and debug issues: sending screenshots of code or error logs instead of just sharing the actual text. ➡️ Why this is a problem: You can’t copy, search, or inspect a screenshot. You lose contextwhat file? What line? What repo? It slows everyone down, especially in fast-moving dev environments. ➡️ A better approach: Paste the relevant snippet directly. Use Gists, permalinks, or share the full stack trace in plain text. Reserve screenshots for when visual layout is the key (e.g. font rendering bugs, UI issues). This isn’t just about neatness it’s about clarity, speed, and respect for your teammates' time. 🧠 Developers thrive on searchable, shareable, readable content. Let’s lean into tools and habits that support that.

𝐌𝐨𝐬𝐭 𝐭𝐮𝐭𝐨𝐫𝐢𝐚𝐥𝐬 𝐭𝐞𝐚𝐜𝐡 𝐲𝐨𝐮 𝐡𝐨𝐰 𝐭𝐨 𝐜𝐨𝐝𝐞. Almost none teach you how to think like a senior developer. If you actually want to understand how real engineers design, reason, and build — this channel is gold. I’ve been watching Dragos Nedelcu (The Real Senior Dev) lately, and it’s hands down one of the most practical web dev channels out there. No copy-paste projects. No “just works” hacks. It’s all about architecture, tradeoffs, scalability — and writing code that holds up in production. 🔗 https://lnkd.in/dpA_399S If you’re serious about leveling up from tutorial coder to real developer, this is worth every minute. Wish I had this a few years ago. #WebDevelopment #SoftwareEngineering #CareerGrowth

 🚀Staying Consistent. Revisiting core patterns and strengthening intuition. DSA today: • Search in Rotated Sorted Array • Find Minimum in Rotated Sorted Array • 3Sum • Sort Colors • Max Consecutive Ones III • Remove Duplicates from Sorted Array Frontend: Revisiting component patterns, props flow, and state handling in React — writing cleaner, more predictable UIs. Showing up daily. Sharpening logic. No skipping of fundamentals. 🚀 #learning

The 4 software design mistakes I see from juniors. Not only juniors actually… senior developers  make them as well: - Applying design techniques without taking the context into account - Components that serve multiple, different stakeholder outcomes - Wrong direction of dependencies - Not knowing when to make abstractions Applying software design techniques without knowing how it will benefit the code has the opposite effect on the code. Components that serve multiple different outcomes lead to unwanted side effects that can be hard to detect. The wrong direction of dependencies leads to code that is forced to be changed by other code. Not knowing when to abstractions leads to either under-engineered code or overengineered code. Both have a bad impact on how easy the code can change. 

conway-errors: Bringing Order to Errors as Part of Your Projects Architecture While working with a large frontend application codebase, I noticed that functionality gradually clusters around teams (domains). Each functional group eventually imposes its own architectural constraints. As it turned out, error handling when comparing code from two different teams was inconsistent. In one case, developers structured errors using standard JS/TS inheritance, while in another case, error catching and logging were used. It became clear that we needed to generalize our approach to how we structure (name, inherit) and throw errors. As practice showed, coding conventions weren't sufficient. What did we want to achieve? A unified and strict way to create error hierarchies (from base to final functionality) The ability to describe the relationship between an error and the team's context Generalize the logging mechanism in Sentry and improve error readability when working with the tracking system Provide a convenient API for passing additional parameters "Good primitive is mor https://lnkd.in/gCAfUghT