Software Engineering Interview Guide

✨ What this is

A clean and simple guide to help you revise JavaScript, TypeScript, and modern frontend/backend fundamentals - from the basics to the more advanced topics.

You'll find bite-sized explanations, easy examples, and interview-style questions. No fluff. No overwhelm. Just practical stuff.

💡 How to Use This

1. Skim the topic list above
2. Click into any topic you want to revise
3. Go through examples, notes, and potential questions
4. Relax. God's got you. 🙏

"Commit your work to the Lord, and your plans will be established." - Proverbs 16:3

📚 What's Inside?

🧠 JavaScript Primitives

All 7 primitive data types, immutability & pass-by-value behavior, primitive vs object comparison, type coercion & truthiness

⏳ JavaScript + TypeScript Fundamentals

var vs let vs const, scope, hoisting, closures, types, interfaces, generics, classes, inheritance, this keyword

⚡ Async & Promises

Is JavaScript synchronous? How promises actually work, async/await explained simply, pure functions & functional programming

📦 NPM & Dependencies

What is npm? How package.json works, dependencies vs devDependencies, common npm commands

🚀 Frontend Performance Optimization

Storage options (cookies, localStorage), bundle compression & minification, code splitting & lazy loading, XSS attacks & security

🔷 TypeScript Advanced Concepts

Generic functions in TypeScript, as const vs normal const, type vs interface, type guards & union types

⚙️ Debouncing

What is debouncing & why use it, preventing unnecessary API calls, real-world use cases, search bars, resize events

⚛️ React Fundamentals & Lifecycle

Props & state, component lifecycle, useEffect & side effects, hooks, re-rendering, JSX, common mistakes & mental models

▲ Next.js Fundamentals

SSR vs SSG vs ISR, hydration, SEO optimization, performance improvements, when to use Next.js vs React, rendering strategies

🧙‍♀️ GraphQL vs REST

When to use GraphQL, overfetching & underfetching, schema & documentation, trade-offs, when NOT to use GraphQL, operational considerations

🧙‍♀️ Node.js Fundamentals

When to use Node.js, why was it created?, core runtime concepts, I/O-bound, event-driven, operational considerations, core runtime concepts

🧙‍♀️ Rest Integration

REST Fundamentals & Integration, HTTP methods, idempotency, pagination, rate limiting, webhooks, data mapping, schema validation