TypeScript quiz

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

What does `never` type represent in TypeScript?

1. What does `never` type represent in TypeScript?
2. What does `tsconfig.json` control?
3. What is `void` type used for in TypeScript?
4. How do you specify that a function parameter can be either a string or a number?
5. What is a type guard in TypeScript?
6. What is the `unknown` type and how does it differ from `any`?
7. What is the `any` type in TypeScript?
8. Which TypeScript option enables the strictest type-checking?
9. What is the purpose of the `as const` assertion?
10. What does the `Pick` utility type do?
11. What does the `keyof` operator do in TypeScript?
12. How do you make a property optional in a TypeScript interface?

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