Explain the concept of a Headless service and how it differs from traditional monolithic approaches.

A headless service is an architectural approach where the backend service provides only an API (such as REST or GraphQL) without an embedded user interface. The UI is created separately and interacts with the backend through the API.

Differences from the traditional monolithic approach:

• Responsibility separation: In a headless service, UI and backend develop independently, whereas in a monolith, UI and business logic are closely linked.
• Flexibility: Headless allows the use of different frontends (web, mobile apps, IoT) with a single backend.
• Scalability: Easier to scale backend and frontend separately.

Example: A CMS with a headless architecture provides content via API, and the frontend can be built on React, Vue, or a mobile app, retrieving data through the API.