WGU Cloud-Deployment-and-Operations Exam Dumps

Comprehensive and Detailed Explanation From Exact Extract:

In Amazon CloudFront, the caching TTL is controlled by the minimum and maximum TTL settings, with the maximum TTL (in seconds) capping the cache duration. The current Max TTL is 172800 seconds (48 hours), and the Cache-Control setting of 432000 seconds (120 hours) is ignored because it exceeds the Max TTL. To cache objects for up to 120 hours, the Max setting must be configured to 432000 seconds. The WGU Cloud Deployment and Operations Study Guide (Section 4.4, CloudFront Caching) states, 'The maximum TTL in CloudFront settings (e.g., 172800 seconds) overrides any higher Cache-Control value; to allow 120 hours (432000 seconds), the Max TTL must be set accordingly.' Adjusting Min, expiration, or Cache-Control alone does not resolve this.

Comprehensive and Detailed Explanation From Exact Extract:

To set up self-managed permissions for CloudFormation StackSet operations, two roles are required: in the administrator account, create an IAM role named AWSCloudFormationStackSetAdministrationRole to manage StackSet operations, and in each target account, create a service role named AWSCloudFormationStackSetExecutionRole that trusts the administrator account to execute the stacks. The WGU Cloud Deployment and Operations Study Guide (Section 5.4, StackSets) states, 'For self-managed permissions, the administrator account requires the AWSCloudFormationStackSetAdministrationRole, while each target account needs the AWSCloudFormationStackSetExecutionRole with a trust relationship to the administrator account for stack deployment.' Roles B and D are incorrectly named or misplaced.

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To protect critical data on EBS volumes with a maximum tolerable data loss of one hour, the company should schedule automated volume snapshots using CloudWatch Events. Snapshots capture the state of the volume at a point in time, and regular scheduling (e.g., every hour) ensures data loss is limited to the snapshot interval. The WGU Cloud Deployment and Operations Study Guide (Section 7.3, EBS and Snapshots) states, 'Automated EBS snapshots can be scheduled using CloudWatch Events rules to create backups at defined intervals, ensuring an RPO of one hour by capturing volume data regularly.' Local storage, Cloud Control backups, and Block Express are not viable solutions for this automated snapshot requirement.

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To reduce latency in region B due to increased demand for media files stored in region A, cross-region replication (CRR) should be used. CRR replicates objects to an S3 bucket in another region (e.g., region B), allowing users to access files from a closer location, thus minimizing latency. The WGU Cloud Deployment and Operations Study Guide (Section 2.2, S3 Replication) states, 'Cross-Region Replication in S3 copies objects to a destination bucket in a different region, reducing latency by enabling access to data from the nearest region, such as region B in this case.' S3 Batch, S3 Versioning, and Same-Region replication do not address cross-region latency.

Comprehensive and Detailed Explanation From Exact Extract:

Maximizing the time to live (TTL) of the cache in Amazon CloudFront reduces the frequency of requests to the origin server by serving content from edge locations for a longer period, lowering latency and costs. The WGU Cloud Deployment and Operations Study Guide (Section 4.4, CloudFront Caching) states, 'A higher TTL in CloudFront caching minimizes origin requests by keeping objects in edge caches longer, reducing load on the origin server and optimizing performance and cost.' Facilitating high request volumes, improving disaster recovery, and enhancing security are not primary benefits of maximizing TTL.