5 Intriguing TypeScript Interview Questions and Solutions

Preparing for a TypeScript interview requires not only understanding the language syntax but also having a solid grasp of its features, nuances, and best practices. In this article, we’ll explore five interesting TypeScript interview questions along with detailed solutions to help you ace your next TypeScript interview.

1. Question: What are the key differences between interfaces and abstract classes in TypeScript?

Solution:
- Interfaces:
— Interfaces are purely a compile-time construct and do not generate any JavaScript code.
— They define contracts for classes to implement, specifying the shape of objects.
— Interfaces can extend other interfaces but cannot implement code.
- Abstract Classes:
— Abstract classes can contain both implemented and abstract (unimplemented) members.
— They serve as blueprints for other classes to extend and provide common functionality.
— Abstract classes can have constructor methods.
- In summary, interfaces define contracts, while abstract classes provide a partial implementation of those contracts.