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NEW QUESTION # 318
A company uses an organization in AWS Organizations to manage multiple AWS accounts. The company needs to send specific events from all the accounts in the organization to a new receiver account, where an AWS Lambda function will process the events.
A CloudOps engineer configures Amazon EventBridge to route events to a target event bus in the us-west-2 Region in the receiver account. The CloudOps engineer creates rules in both the sender and receiver accounts that match the specified events. The rules do not specify an account parameter in the event pattern. IAM roles are created in the sender accounts to allow PutEvents actions on the target event bus.
However, the first test events from the us-east-1 Region are not processed by the Lambda function in the receiving account.
What is the likely reason the events are not processed?
Answer: B
Explanation:
Per the AWS Cloud Operations and EventBridge documentation, when events are sent across AWS accounts - particularly from multiple accounts in an AWS Organization - the target event bus in the receiver account must include a resource-based policy that explicitly allows events:PutEvents API calls from the sender accounts or the organization ID.
Even if the sender accounts have IAM permissions to call PutEvents, the receiving event bus must trust those accounts via a resource policy. Without this configuration, EventBridge automatically rejects incoming cross-account events, and those events never reach the target Lambda function for processing.
AWS guidance states that "Cross-account event delivery requires a resource-based policy on the event bus that grants permissions to the source accounts or organization." The policy can include either individual AWS account IDs or the organization's root ID.
In this scenario, because the events originate from multiple accounts and there is no resource policy on the target event bus to authorize those sender accounts, the events are not delivered.
Therefore, the correct cause is C - the resource-based policy on the target event bus must be modified to allow PutEvents API calls from the sender accounts.
NEW QUESTION # 319
A company deploys AWS infrastructure in a VPC that has an internet gateway. The VPC has public subnets and private subnets. An Amazon RDS for MySQL DB instance is deployed in a private subnet. An AWS Lambda function uses the same private subnet and connects to the DB instance to query data.
A developer modifies the Lambda function to require the function to publish messages to an Amazon Simple Queue Service (Amazon SQS) queue. After these changes, the Lambda function times out when it tries to publish messages to the SQS queue.
Which solutions will resolve this issue? (Select TWO.)
Answer: A,D
Explanation:
When an AWS Lambda function is configured to run inside a VPC, it loses default internet access. All outbound traffic must be explicitly routed. In this scenario, the Lambda function resides in a private subnet and successfully connects to Amazon RDS, but it times out when attempting to publish messages to Amazon SQS. This indicates a lack of network connectivity to the SQS service endpoint.
There are two valid AWS-supported ways to restore connectivity. The first is to deploy a NAT gateway in a public subnet and update the private subnet route table to send outbound internet-bound traffic (0.0.0.0/0) to the NAT gateway. This allows the Lambda function to reach public AWS service endpoints, including SQS.
The second option is to create an interface VPC endpoint (AWS PrivateLink) for Amazon SQS. This enables private, secure connectivity to SQS directly within the AWS network without traversing the internet. This approach is often preferred for security-sensitive workloads and removes dependency on NAT gateways.
Option A would break database connectivity because the Lambda function must remain in the VPC to access the private RDS instance. Option B does not address outbound connectivity to SQS. Option E is incorrect because Amazon SQS does not support gateway endpoints; only interface endpoints are supported.
Therefore, deploying a NAT gateway or creating an SQS interface endpoint resolves the timeout issue.
NEW QUESTION # 320
A CloudOps engineer has blocked public access to all company Amazon S3 buckets. The CloudOps engineer wants to be notified when an S3 bucket becomes publicly readable in the future. What is the MOST operationally efficient way to meet this requirement?
Answer: A
Explanation:
AWS Config provides a managed rule named s3-bucket-public-read-prohibited that continuously evaluates whether S3 buckets allow public read access. Sending rule compliance changes to Amazon SNS provides automated notification when a bucket becomes publicly readable, without needing custom scripts or Lambda polling.
NEW QUESTION # 321
A company requires the rotation of administrative credentials for production workloads on a regular basis. A CloudOps engineer must implement this policy for an Amazon RDS DB instance's master user password.
Which solution will meet this requirement with the LEAST operational effort?
Answer: B
Explanation:
AWS Secrets Manager natively supports credential management and automatic rotation for Amazon RDS master user passwords. When a secret is associated with an RDS instance, Secrets Manager automatically updates the password both in the secret and on the database, without downtime or manual scripting.
AWS documentation confirms:
"AWS Secrets Manager can automatically rotate the master user password for Amazon RDS databases.
Rotation is fully managed and integrated, requiring no custom code or maintenance." Option A introduces unnecessary Lambda automation. Option B and C use Parameter Store, which does not provide direct RDS password rotation. Therefore, Option D achieves secure, automatic credential rotation with least operational effort, fully aligned with CloudOps security automation principles.
References:* AWS Certified CloudOps Engineer - Associate (SOA-C03) Exam Guide - Domain 4: Security and Compliance* AWS Secrets Manager - Rotating Secrets for Amazon RDS* AWS Well-Architected Framework - Security Pillar* Amazon RDS User Guide - Managing Master User Passwords
NEW QUESTION # 322
A CloudOps engineer has successfully deployed a VPC with an AWS CloudFormation template. The CloudOps engineer wants to deploy the same template across multiple accounts that are managed through AWS Organizations.
Which solution will meet this requirement with the LEAST operational overhead?
Answer: A
Explanation:
Comprehensive Explanation (250-350 words):
CloudFormation StackSets are designed specifically to deploy and manage the same CloudFormation stack across multiple AWS accounts and Regions from a centralized administration point. When accounts are managed under AWS Organizations, StackSets can integrate directly with Organizations to target Organizational Units (OUs) or specific accounts, which minimizes operational overhead. This removes the need to manually assume roles and deploy stacks one-by-one, and avoids building custom automation (Lambda + cross-account role assumption + account enumeration + error handling + retries + idempotency).
With StackSets, you define the template once and then create stack instances across many accounts in a controlled and consistent manner. StackSets provide built-in features for: (1) centralized rollout and updates, (2) drift detection, (3) automatic deployment to new accounts (when using Organizations integration), and (4) standardized execution roles. This is operationally simpler and safer than scripting because StackSets handle orchestration and track deployment state per account/Region.
Option A increases manual work and is error-prone at scale. Options B and C require custom Lambda orchestration, cross-account permissions, and ongoing maintenance for failure modes and change management. StackSets provide the native "least ops" approach to multi-account CloudFormation deployments under Organizations.
NEW QUESTION # 323
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