Which methods can be used to identify AWS costs by departments? (Choose two.)
A . Enable multi-factor authentication for the AWS account root user.
B . Create separate accounts for each department.
C . Use Reserved Instances whenever possible.
D . Use tags to associate each instance with a particular department.
E . Pay bills using purchase orders.
Answer: B,E
Explanation:
Tags are key-value pairs that allow you to organize your AWS resources into groups. You can use tags to:
Visualize information about tagged resources in one place, in conjunction with Resource Groups.
View billing information using Cost Explorer and the AWS Cost and Usage report.
Send notifications about spending limits using AWS Budgets.
Use logical groupings of your resources that make sense for your infrastructure or business.
For example, you could organize your resources by:
Project
Cost center
Development environment
Application
Department
Reference: https://aws.amazon.com/premiumsupport/knowledge-center/tags-billing-cost-center-project/