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.

Top TypeScript Interview Questions and Answers for Developers

Q: 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.

31. How does type narrowing work?

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32. What are type guards?

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33. How do instanceof and typeof work as type guards?

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34. What are custom type predicates?

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35. What are functions in TypeScript?

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36. How do optional and default parameters work?

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37. What are rest parameters in TypeScript?

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38. How does function overloading work?

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39. What are generics in TypeScript?

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40. Why are generics important in scalable applications?

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