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問題 #171
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?
答案：C
解題說明：
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.
Reference: AWS Cloud Operations - EventBridge Cross-Account Event Delivery Section, Permissions for Event Bus Targets and Organizational Event Routing
問題 #172
A company's application is hosted by an internet provider at app.example.com. The company wants to access the application by using www.company.com, which the company owns and manages with Amazon Route 53.
Which Route 53 record should be created to address this requirement?
答案：B
解題說明：
When mapping one domain name to another domain name that is hosted outside AWS, a CNAME record is the correct DNS record type. CNAME records map an alias name (www.company.com) to a canonical domain name (app.example.com).
Alias records cannot be used to point to non-AWS resources. A and PTR records map IP addresses, not domain names, and are therefore not appropriate.
Because www.company.com is not the zone apex, a CNAME record is valid and supported. This solution requires no additional infrastructure and is the standard DNS approach for this scenario.
問題 #173
A finance company uses AWS Secrets Manager to store Amazon RDS credentials that are periodically rotated. A database team must receive a notification when the credentials are rotated to ensure compliance with security policies. The database team creates an Amazon Simple Notification Service (Amazon SNS) topic for the notifications.
Which solution will meet these requirements?
答案：C
解題說明：
AWS Secrets Manager rotation is an API-driven activity that is recorded as an audit event. When the secret rotation workflow is initiated, AWS API activity is captured by AWS CloudTrail, which provides an authoritative source of "who did what and when" for compliance evidence. By creating an Amazon EventBridge rule that matches the relevant CloudTrail event for the rotation operation, the company can automatically detect rotation activity and trigger downstream actions without building a polling system. EventBridge can route matched events directly to Amazon SNS, which then fan-outs the notification to email, SMS, chat integrations, or incident tooling used by the database team.
Option A fits the requirement because it creates an event-driven compliance notification path specifically tied to the rotation operation. It also allows more precise filtering than log scanning:
the rule can match the event name and include conditions that reflect successful completion, reducing noise and false positives. EventBridge rules are managed, highly available, and require minimal operational work once configured.
問題 #174
A CloudOps engineer is using AWS Compute Optimizer to generate recommendations for a fleet of Amazon EC2 instances. Some of the instances use newly released instance types, while other instances use older instance types.
After the analysis is complete, the CloudOps engineer notices that some of the EC2 instances are missing from the Compute Optimizer dashboard.
What is the likely cause of this issue?
答案：B
解題說明：
According to the AWS Cloud Operations and Compute Optimizer documentation, Compute Optimizer provides right-sizing recommendations by analyzing Amazon CloudWatch metrics and instance configuration data. However, AWS explicitly notes that only supported instance types are included in Compute Optimizer analyses. If an EC2 instance type is newly released or not yet supported by Compute Optimizer, it will not appear in the Compute Optimizer dashboard until official support is added.
The documentation explains that "Compute Optimizer analyses only supported resource types and instance families. Instances using unsupported or newly launched instance types will not appear in the Compute Optimizer console." This ensures the service provides accurate recommendations based on sufficient performance history and benchmark data.
While CloudWatch metrics are required for analysis, the complete absence of instances from the dashboard - rather than "insufficient metric data" notifications - indicates unsupported instance types. Compute Optimizer would normally still display those with limited metrics but would flag them as "insufficient data," not remove them entirely.
Therefore, the most accurate cause of missing instances in this case is that Compute Optimizer does not support the newly released instance types, making option B correct.
問題 #175
A company uses a large number of Linux-based Amazon EC2 instances to run business operations. The company uses AWS Systems Manager to manage the EC2 instances. The company wants to ensure that the Systems Manager Agent (SSM Agent) is always up to date with the latest version.
Which solution will meet this requirement in the MOST operationally efficient way?
答案：B
解題說明：
AWS Systems Manager provides a built-in capability to automatically update the SSM Agent on managed instances. Enabling Auto update SSM Agent ensures that instances receive the latest agent version without manual intervention or custom automation.
This setting is centrally managed and applies across the fleet, making it the most scalable and operationally efficient solution. It eliminates the need for external notifications, custom Lambda functions, or scheduled automation workflows.
Options B and D introduce unnecessary complexity and operational burden. Option C is incorrect because Patch Manager is designed for operating system patching, not for managing SSM Agent updates.
Therefore, enabling automatic SSM Agent updates is the best solution.
問題 #176
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2026 Testpdf最新的SOA-C03 PDF版考試題庫和SOA-C03考試問題和答案免費分享：https://drive.google.com/open?id=1V99uONQceWi7Ql4VQfjlqEQwIzywZko8