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DOP-C02 · Question #221

A company uses AWS Control Tower and AWS CloudFormation to manage its AWS accounts and to create AWS resources. The company requires all Amazon S3 buckets to be encrypted with AWS Key Management Servi

The correct answer is B. Use AWS Control Tower with a multi-account environment. Configure and enable proactive AWS. Proactive controls: Proactive controls are preventative measures that block actions violating defined policies before they occur. This ensures encryption gets applied automatically during S3 bucket creation within CloudFormation stacks. CloudFormation hooks: Hooks enable Control

Submitted by tarun92· Mar 6, 2026Security and Compliance

Question

A company uses AWS Control Tower and AWS CloudFormation to manage its AWS accounts and to create AWS resources. The company requires all Amazon S3 buckets to be encrypted with AWS Key Management Service (AWS KMS) when the S3 buckets are created in a CloudFormation stack. Which solution will meet this requirement?

Options

  • AUse AWS Organizations. Attach an SCP that denies the s3:PutObject permission if the request
  • BUse AWS Control Tower with a multi-account environment. Configure and enable proactive AWS
  • CUse AWS Control Tower with a multi-account environment. Configure and enable detective AWS
  • DUse AWS Organizations. Create an AWS Config organizational rule to check whether a KMS

How the community answered

(22 responses)
  • A
    9% (2)
  • B
    64% (14)
  • C
    23% (5)
  • D
    5% (1)

Explanation

Proactive controls: Proactive controls are preventative measures that block actions violating defined policies before they occur. This ensures encryption gets applied automatically during S3 bucket creation within CloudFormation stacks. CloudFormation hooks: Hooks enable Control Tower to intercept and enforce policies on CloudFormation stack operations, making it ideal for enforcing encryption during resource Multi-account environment: Since the requirement applies across all accounts, Control Tower's multi-account capabilities ensure consistent policy enforcement throughout the organization.

Topics

#AWS Control Tower#CloudFormation hooks#S3 encryption#Preventative controls

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