Crack Your First Tech Interview

Welcome to the DEV Crack Interview Q&A Hub — built specifically for freshers preparing for web development roles.

We’ve organized interview questions and answers into three skill levels:
Basic → Intermediate → Advanced
So you can learn step-by-step, build confidence, and perform like a pro in real interviews.

What’s Inside

For each core topic, you’ll find:

• Basic: Must-know concepts & definitions
• Intermediate: Real-world questions, logic, and usage
• Advanced: Edge cases, tricky logic, system-level thinking

Topics We Cover

🔹 HTML & CSS

• Basic: Semantic tags, structure, form elements, CSS selectors
• Intermediate: Flexbox, Grid, responsive design, positioning, z-index
• Advanced: Accessibility, specificity, BEM, CSS performance tips

🔹 JavaScript

• Basic: Variables, data types, conditionals, loops, functions
• Intermediate: Closures, DOM manipulation, callbacks, event bubbling
• Advanced: Async/await, prototypes, memory, this, hoisting, execution context

🔹 React JS

• Basic: JSX, components, props, state, events
• Intermediate: Hooks (useEffect, useContext), forms, lists, conditional rendering
• Advanced: Performance, memoization, custom hooks, lifting state, context API

🔹 Redux JS

• Basic: Store, reducer, actions, state flow
• Intermediate: Redux Toolkit, async actions, middleware
• Advanced: Large-scale structure, reusability, state optimization

🔹 Next JS

• Basic: File-based routing, pages, assets, layout
• Intermediate: SSR, SSG, CSR, data fetching
• Advanced: API routes, middleware, performance tuning, SEO strategies

🔹 Node JS

• Basic: Intro to backend, file system, modules
• Intermediate: Events, streams, error handling
• Advanced: Auth, performance, CLI tools, deployment basics

🔹 Express JS

• Basic: Routing, request/response, basic middleware
• Intermediate: CRUD APIs, JWT, error handling, CORS
• Advanced: Scalable structure, rate limiting, file uploads

🔹 MongoDB

• Basic: Collections, documents, CRUD
• Intermediate: Queries, indexing, aggregation basics
• Advanced: Schema design, performance, data modeling

🔹 Mongoose

• Basic: Schema, models, connection
• Intermediate: Validation, population, middleware
• Advanced: Optimizing queries, relational data, advanced patterns

Who Should Use This?

• Final year students & fresh graduates
• Self-taught developers & bootcamp learners
• Career switchers learning full-stack
• Anyone preparing for entry-level developer roles

Need Help?

Learning alone is hard. But you’re not alone.

Join our supportive developer community on Discord — ask questions, get feedback, and connect with others on the same journey.

Join Our Discord Server 

How to Start

1. Pick a topic from the list above.
2. Start with basic, go through intermediate, then finish advanced.
3. Take notes and speak answers out loud like a real interview.
4. Bookmark tricky questions. Revisit regularly.
5. Practice mock interviews with friends or mentors.

“First interviews are tough — preparation makes the difference.”
— Team DEV Crack

Ready to dive in? Let’s do this 💪