TypeScript quiz

Test your TypeScript knowledge with a free interactive quiz — 51 questions with answers and explanations. No signup needed to play.

What does the `Pick` utility type do?

1. What does the `Pick` utility type do?
2. How do you extend an interface in TypeScript?
3. What is the purpose of the `as const` assertion?
4. What file extension is used for TypeScript files with JSX?
5. Which TypeScript option enables the strictest type-checking?
6. What is the `enum` type in TypeScript?
7. What is a union type in TypeScript?
8. How do you make a property optional in a TypeScript interface?
9. What does `never` type represent in TypeScript?
10. What is a tuple type in TypeScript?
11. What is a type guard in TypeScript?
12. What are generics in TypeScript?

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