What does the term 'tightly integrated' refer to in relation to microservices?

• A. A high level of independence among services
• B. A close coupling leading to shared functionalities
• C. An approach that requires all services to be deployed simultaneously
• D. An architecture with multiple API connections

Answer: (B)

The term 'tightly integrated' in relation to microservices refers to a close coupling leading to shared functionalities. This means that the microservices in question are designed to work closely together and often rely on shared resources or functionalities to perform their tasks. In tightly integrated systems, changes in one service can have immediate effects on others due to their interdependencies, which can enhance collaboration but may also introduce challenges in terms of scalability and flexibility.

In contrast, loosely integrated microservices are generally designed to operate independently, allowing for greater flexibility, scalability, and resilience. While a tightly integrated approach can offer benefits in terms of performance and consistency across services, it can also complicate deployment and maintenance because changes need to be carefully managed across interconnected services. This close coupling contrasts significantly with other architectural approaches, which may prioritize independence and isolation among services.