What approaches exist for coordinating actions between microservices? Name two main types.

There are two main approaches to coordinating actions between microservices:

1. Orchestration — centralized management of the process, where one service (the orchestrator) controls the sequence of calls and the interaction logic between other microservices. An example is a service that calls other services in sequence and processes their responses.

2. Choreography — decentralized interaction, where each microservice independently reacts to events and performs its actions without a central controller. Services exchange events via a message bus or broker.

The choice of approach depends on system requirements, business logic complexity, and scalability.