Which service is a serverless event bus service that makes it easy to connect your applications with data from a variety of sources?

• A. AWS Step Functions
• B. Amazon EventBridge
• C. Amazon QuickSight
• D. Amazon MQ

Answer: (B)

A serverless event bus that connects data from many sources means you publish events from diverse origins and have other parts of your system react to them without tight coupling. Amazon EventBridge fits this exactly: it provides a fully managed, serverless event bus that ingests events from AWS services, integrated SaaS applications, and your own applications, then routes those events to targets such as Lambda, Step Functions, SQS, or SNS based on rules. It scales automatically and you pay per event, making it ideal for building event-driven architectures that pull in data from multiple sources and trigger appropriate processing.

Other options don’t fit as neatly: AWS Step Functions orchestrates workflows rather than acting as a central event bus; Amazon QuickSight is a BI/analytics service; and Amazon MQ is a managed message broker for traditional queueing, not a serverless event bus connecting multiple data sources.