React Interview Questions & Practice

Sample React interview questions

• Hooks Lifecycle

  Can you explain the rules of hooks in React, and why they exist?

• Rendering Reconciliation

  Can you explain how React's reconciliation algorithm decides whether to update, replace, or remove a DOM node?

• State Management

  When would you lift state up versus reaching for something like Context or a state management library?

• Performance Optimization

  Can you explain what React.memo does, and when it actually helps versus when it's dead weight?

• Component Design

  How do you decide when to break a component into smaller pieces versus keeping it as one larger component?

• Context Data Flow

  Can you explain how React Context works under the hood, and why overusing it can hurt performance?

• Effects Side Effects

  Can you explain the dependency array in useEffect, and what actually happens if you get it wrong?

• Testing Debugging

  How do you approach testing a React component — what do you test, and what do you deliberately not test?

These are a few examples — each real session pulls 5 questions at random from a larger pool across every category above, so repeat sessions won't repeat the same set.

Frequently asked questions

Is this a live-coding React interview?

No. React practice on Hone is a spoken, conceptual discussion — you explain your reasoning out loud rather than writing or sharing code.

How many React questions are there?

Each session pulls 5 questions at random from a larger pool across multiple categories, so repeat sessions don't repeat the same set.

Can I choose the difficulty?

Yes — easy, medium, or hard, chosen right before you start. It changes how hard the interviewer pushes on follow-ups and how strictly it scores your answers.

Is it free?

Yes — every account gets 5 interviews a month, any track, for free. Pro upgrades to unlimited interviews for $99/month.