(A company has the following disaster recovery requirements: The loss of up to three hours of data is acceptable. Services must be restored within one hour of failure. Which recovery characteristics will allow the company to meet the requirements?)
Answer(s): D
Comprehensive and Detailed Explanation From Exact Extract:Recovery Point Objective (RPO) measures the maximum acceptable data loss, while Recovery Time Objective (RTO) measures the maximum acceptable downtime. The company requires an RPO of up to 3 hours (acceptable data loss) and an RTO of 1 hour (service restoration time). The correct option is RPO 4 hours, RTO 1 hour, as it meets the RPO requirement (allowing up to 3 hours of data loss is within 4 hours) and satisfies the RTO of 1 hour. The WGU Cloud Deployment and Operations Study Guide (Section 8.1, Disaster Recovery) states, "RPO defines the maximum data loss tolerance (e.g., 3 hours), and RTO defines the maximum downtime (e.g., 1 hour); a configuration of RPO 4 hours and RTO 1 hour aligns with these thresholds." Other options fail to meet both criteria simultaneously.
(A company stores critical data on general-purpose Amazon EBS volumes. The company can only tolerate the loss of up to one hour of data. Which solution should be used to protect data from loss?)
Answer(s): B
Comprehensive and Detailed Explanation From Exact Extract: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.
(Media files are stored in an S3 bucket in region A. Demand for the files from region B has increased. Region B is suffering from some latency issues due to geographical location. Which type of replication will reduce the latency in region B?)
Answer(s): C
Comprehensive and Detailed Explanation From Exact Extract: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.
(Which solution should be used to identify and shut down idle EC2 instances in an AWS account?)
Comprehensive and Detailed Explanation From Exact Extract:CloudWatch should be used to identify and shut down idle EC2 instances by monitoring metrics such as CPU utilization or network activity. Custom alarms can be set to trigger an AWS Lambda function or Systems Manager automation to terminate idle instances, optimizing costs. The WGU Cloud Deployment and Operations Study Guide (Section 4.1, CloudWatch Metrics) states, "CloudWatch can monitor EC2 instance metrics like CPUUtilization; an alarm can be configured to invoke a Lambda function to terminate idle instances, ensuring cost efficiency." CloudFront, CloudSearch, and CloudTrail are not designed for this monitoring and automation task.
(An administrator is unable to make an AMI public. What is the cause?)
Comprehensive and Detailed Explanation From Exact Extract:The inability to make an AMI public is caused by an encrypted boot volume. AWS does not allow AMIs with encrypted EBS snapshots to be shared publicly due to security constraints; sharing is limited to specific AWS accounts. The WGU Cloud Deployment and Operations Study Guide (Section 6.3, AMI Management) states, "An AMI cannot be made public if its boot volume is encrypted; encryption restricts sharing to authorized accounts only, requiring decryption keys to be managed separately." Legacy BIOS, paravirtual virtualization, and the absence of a bookmark do not impact AMI sharing.
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