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AWS Certified CloudOps Engineer Associate SOA-C03 Practice Question

A development team runs an application on Amazon EC2 instances in Account A. The application must upload daily log files to a private Amazon S3 bucket that is owned by Account B. Security mandates removal of all long-term credentials on the instances and wants access restricted only to writing objects to that specific bucket. Which solution meets these requirements while following AWS IAM best practices?

  • Attach the AmazonS3FullAccess managed policy to the existing EC2 instance profile in Account A and add a bucket policy in Account B that grants the role permission to write objects.

  • Create an IAM user in Account B with programmatic access, store the user's access keys in AWS Systems Manager Parameter Store, and have the EC2 instances read the keys at runtime.

  • Enable S3 cross-region replication from a new bucket in Account A to the target bucket in Account B so logs are copied automatically without additional IAM configuration.

  • In Account B, create an IAM role that allows s3:PutObject only on the log bucket and trusts Account A. Allow the EC2 instance profile in Account A to assume this role with STS, and have the application use the temporary credentials to upload logs.

AWS Certified CloudOps Engineer Associate SOA-C03
Security and Compliance
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