Describe the differences between a monolithic architecture and a microservices architecture. What would be your approach to decide which one to use for a new project?

A monolithic architecture is a single unified unit where components are interconnected and interdependent, while microservices architecture consists of small, independent services that communicate via APIs. The decision between the two depends on various factors such as scalability needs, team structure, and deployment frequency. I would analyze project requirements, future growth, team expertise, and existing infrastructure to make the most informed decision.