AWS Cost Explorer
Cost Explorer is a tool that visualizes and analyzes past costs.
It is not a service for checking the operational status of services or events affecting the account, so it is incorrect.
Which service lets you check the operational status of AWS services and events (such as maintenance or outages) that may affect the resources in your own account?
A question asking which service checks service status and impactful events.
AWS Cost Explorer
Cost Explorer is a tool that visualizes and analyzes past costs.
It is not a service for checking the operational status of services or events affecting the account, so it is incorrect.
AWS IAM
IAM is a service that manages access permissions.
It is not a service for checking the operational status or events of services, so it is incorrect.
AWS Trusted Advisor
Trusted Advisor is a service that inspects best practices and provides recommendations.
It is not a service for checking the operational status of services or events affecting the account, so it is incorrect.
AWS Health Dashboard
This is correct. AWS Health Dashboard is a service that lets you check the overall operational status of AWS services and events that may affect the resources in your own account (planned maintenance, outages, changes, and so on). You can grasp impactful events and use them to decide on your response.
"Service operational status" and "events affecting the account" mean AWS Health Dashboard. Its role differs from cost analysis (Cost Explorer) and recommendations (Trusted Advisor).