TypeScript is a typed superset of JavaScript that compiles to plain JavaScript and adds optional static typing, interfaces, and modern language features.

What are TypeScript interfaces?

Interfaces in TypeScript define the shape of objects and provide contracts for classes, enabling better type checking and code clarity.

What are generics in TypeScript?

Generics allow you to create reusable components that work with a variety of types while preserving type information, making your code more flexible and type-safe.

TypeScript Interview Questions

21. What are interfaces in TypeScript?

22. How do interfaces differ from type aliases?

23. What is interface merging?

24. What are optional properties in interfaces?

25. What are readonly properties?

26. What are tuples in TypeScript?

27. How do enums work in TypeScript?

28. What are const enums?

29. What are literal types?

30. What are discriminated unions?