TypeScript quiz

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

What is TypeScript?

1. What is TypeScript?
2. What does the `Pick` utility type do?
3. Which TypeScript option enables the strictest type-checking?
4. What is the `any` type in TypeScript?
5. What is the `unknown` type and how does it differ from `any`?
6. What is the difference between `interface` and `type` in TypeScript?
7. How do you specify that a function parameter can be either a string or a number?
8. What is a type guard in TypeScript?
9. What is `void` type used for in TypeScript?
10. What does `tsconfig.json` control?
11. What file extension is used for TypeScript files with JSX?
12. What is type assertion in TypeScript?

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