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

61. How does module resolution work?

62. What are CommonJS and ES modules?

63. How does TypeScript interoperate with JavaScript libraries?

64. What are declaration files in TypeScript?

65. What are .d.ts files?

66. How does DefinitelyTyped work?

67. What are ambient declarations?

68. How do async and await work in TypeScript?

69. How are Promise types handled in TypeScript?

70. What are common asynchronous typing challenges?