Common Interview Questions for Frontend Developers [GitHub repo with interview questions]

Over the past few months, I’ve been closely observing the frontend interview market and how different companies conduct their hiring process. While the exact format varies from company to company, one common pattern stands out:

Most companies conduct two technical rounds.

Interview Structure Overview

🔹 Round 1: Technical Basics Round

The first round is usually focused on evaluating your fundamentals. Interviewers want to understand how strong your basics are before moving forward.

Common areas covered in this round include:

1. JavaScript Fundamentals

• Output-based questions

• Closures, hoisting, scope

• var, let, const

• Event loop, promises, async/await

• Array and object methods

2. React / Next.js Basics

• Component lifecycle

• Hooks (useState, useEffect, useMemo, useCallback)

• Controlled vs uncontrolled components

• Props vs state

• Internal working

• Basic Next.js concepts (SSR, CSR, routing)

3. Coding / Output Questions

• Predict the output of JavaScript snippets( closure, hoisting)

4. DSA (1–2 Questions)

• Mostly easy to medium level

• Arrays, strings, hash maps, and sliding windows

• Logic and approach matter more than syntax

Round 2: Team Lead / Engineering Manager Round

The second round is usually taken by a Team Lead, Engineering Manager, or Senior Engineer.

This round is more discussion-oriented and focuses on your real-world experience.

1. Questions Based on Your CV

• Projects you’ve worked on

• The architecture decisions you made

• Challenges you faced and how you solved them

• Performance optimizations

• Collaboration with backend/design teams

2. Frontend Design Question

You may be asked to:

• Design a component or feature

• Explain how you would build a scalable UI

• Discuss state management and performance

• Handle edge cases and user experience

3. DSA (If Time Permits)

• Usually one question

• Focused on problem-solving and clarity of thought

Key Points to Remember

Time Management Is Crucial

Every interviewer has a fixed time slot (usually 45–60 minutes). Your goal should be to use that time wisely.

How to Do That Effectively

• Start with a basic solution

• Explain your thought process clearly

• Then, gradually optimize the solution

• Improve readability, performance, and edge cases

• Share real-world examples wherever possible

This approach shows:

• Strong fundamentals

• Problem-solving ability

• Communication skills

• Growth mindset

Final Thoughts

Frontend interviews are not just about writing code. They’re about how you think, how you explain, and how you improve your solution step by step.

All the interview questions mentioned here are available in this GitHub repository:

React-interview-question

If your fundamentals are strong and you communicate clearly, you already stand out in the interview process.

I hope you found this blog useful. If you did, feel free to share it with your friends. I’d also love to hear your feedback.
You can reach out to me on Twitter at @lalitaswal2 — happy to hear your thoughts and suggestions for future topics.