Which AWS service is always provided at no charge?
Amazon S3
AWS Identity and Access Management (IAM)
Elastic Load Balancers
AWS WAF
Explanations:
Amazon S3 is a paid service that charges for storage and data transfer, with a free tier offering limited usage.
AWS Identity and Access Management (IAM) is always free and allows users to manage access to AWS services and resources without any associated costs.
Elastic Load Balancers are a paid service, charging based on usage including the number of load balancers and data processed.
AWS WAF (Web Application Firewall) incurs charges based on the number of web access control lists (ACLs) and the number of requests processed.