Question

Explain the use of IAM Trust Policies.

Answer 1

IAM Trust Policies define which entities (users, roles, AWS services) are allowed to assume a role. This is typically used for roles that need to be assumed by other AWS accounts or services.

Example Trust Policy JSON:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "Service": "ec2.amazonaws.com"
      },
      "Action": "sts:AssumeRole"
    }
  ]
}