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Redux Toolkit in 2025 — Why Old Redux Hurt and How RTK Fixed It

2d ago · 9 min read · Hey everyone, Richa here! 👋 Day 8. Story time. I'm a junior dev on my first React project. The tech lead says "we use Redux." I open the codebase and there are folders called actions, reducers, ac

Zustand — The Modern Lightweight State Manager Every Senior Should Know

3d ago · 8 min read · Hey everyone, Richa here! 👋 Day 7. And today we're talking about the library that made me say — "wait, why did we ever do it any other way?" Zustand. When I came back to React after 2 years in Lit.j

Context API — What It's Good For and Where It Quietly Breaks Your App

4d ago · 9 min read · Hey everyone, Richa here! 👋 Day 6. Week 2 starts today — and we're going straight into the thing that causes the most confusion about React state management. Context API. I've seen it used as a glob

useMemo, useCallback, React.memo — The Real Rules for When to Use Them

5d ago · 9 min read · Hey everyone, Richa here! 👋 Day 5. Let's talk about the most over-used, misunderstood, "just wrap everything in it" hooks in React. useMemo. useCallback. React.memo. I used to add useCallback to eve

useEffect Done Right — The Hook That Causes More Bugs Than Any Other

6d ago · 10 min read · Hey everyone, Richa here! 👋 Day 4. And today we're talking about the hook I have a love-hate relationship with. useEffect. I've seen it cause infinite loops in production. I've seen it fetch the sam

useState vs useReducer — When Simple State Stops Being Simple

Apr 19 · 9 min read · Hey everyone, Richa here! 👋 Day 3. Quick confession before we start. For a long time I used useState for everything. Every single piece of state in every component. And when things got complicated,

Thinking in Components — The Skill Nobody Teaches You Properly

Apr 18 · 9 min read · Hey everyone, Richa here! 👋 Day 2. Let's talk about something that sounds simple but is actually one of the most asked things in senior interviews. "How do you decide how to break a UI into compone

How React Actually Works — And Why I Never Bothered to Learn It (Until Now)

Apr 17 · 9 min read · Hey everyone, Richa here! 👋 Okay. Day 1. Let's talk about something embarrassing. I have 3 years of React experience. I've shipped real apps to real users. I've reviewed code, led features, debugge

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100 Hadoop Interview Questions for Senior Developers with Answers

Mar 18 · 21 min read · Senior-level interviews expect more than correct definitions. You are judged on system design reasoning, production war stories, and the ability to weigh trade-offs under time pressure. This collectio

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100 Scala Interview Questions for Senior Developers

Mar 6 · 17 min read · Preparing for a Scala interview at the senior level requires more than surface knowledge. Companies expect experienced engineers to reason about type systems, concurrency models, and architectural tra