TypeScript Interview Questions & Practice

Sample TypeScript interview questions

• Type System Basics

  Can you explain the difference between any, unknown, and never, and when each is appropriate?

• Generics

  Can you explain what a generic function or type is, and walk me through a practical example of when you'd reach for one?

• Narrowing Guards

  Can you explain what type narrowing is, and give an example using a type guard?

• Structural Typing

  Can you explain why TypeScript considers two differently-named types compatible if they have the same shape?

• Utility Types

  Can you explain what Partial<T> and Required<T> do, and give an example of when you'd use each?

• Interfaces Vs Types

  When would you choose an interface over a type alias, or does it not matter to you?

• Advanced Types

  Can you explain what a mapped type is, and walk me through a simple example?

• Tooling Migration

  Tell me about a time you migrated a JavaScript codebase, or part of one, to TypeScript. What was hardest?

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 TypeScript interview?

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

How many TypeScript 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.