CV0-004 Practice Test 6 — 10 Questions

Question 1

During a scheduled DR drill, the cloud team fails over a critical application to the secondary region. After the drill, the application is failed back. The application's RTO was 2 hours, but the actual failover took 2.5 hours. Which action should be taken to improve future failover times?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Automate the failover process using infrastructure as code and runbooks. Failing the RTO indicates the process is not meeting the target. Automating the failover process with scripts or runbooks reduces manual steps and time. Rehearsing the process more often also helps but automation directly reduces time.

Answer

Increase the frequency of DR drills

Answer

Increase the bandwidth between regions for data replication

Answer

Reduce the RTO to 1 hour to force faster execution

Question 2

A company uses AWS and wants to analyze cost trends and identify the top services contributing to monthly spending. Which AWS tool provides a pre-built dashboard for this purpose?

Accepted Answer

AWS Cost Explorer. AWS Cost Explorer provides pre-built reports and dashboards for cost trend analysis.

Answer

AWS Trusted Advisor

Answer

AWS Compute Optimizer

Answer

AWS Budgets

Question 3

An organization wants to track cloud costs by project and environment (development, testing, production). Which strategy should be employed for cost attribution?

Accepted Answer

Implement a tagging strategy for resources with Environment and Project tags. Tagging resources with key-value pairs (e.g., Project, Environment) enables cost allocation reports. Billing alerts and budgets help manage costs but not attribution.

Answer

Set up billing alerts for each account

Answer

Enable detailed billing reports with resource IDs

Answer

Use AWS Budgets to set spending limits per project

Question 4

A cloud engineer is troubleshooting a network connectivity issue between two subnets in a VPC. The engineer wants to capture and analyze traffic metadata to identify dropped packets. Which TWO tools can provide this information? (Select TWO.)

Accepted Answer

AWS Network Firewall logs. VPC Flow Logs capture metadata about IP traffic going to and from network interfaces. AWS X-Ray provides distributed tracing but for application-level requests, not raw network traffic. AWS CloudTrail logs API calls, not traffic.

Answer

AWS X-Ray

Answer

Amazon CloudWatch Logs

Answer

AWS CloudTrail

Question 5

A company uses AWS and wants to implement a disaster recovery plan with an RTO of 4 hours and RPO of 1 hour. They have a primary site in us-east-1 and a DR site in us-west-2. The application data is stored in Amazon RDS for MySQL. Which strategy meets both RTO and RPO with minimal data loss?

Accepted Answer

Create a cross-region read replica in us-west-2 and promote it during failover.. Cross-region read replicas for Amazon RDS provide asynchronous replication with a typical RPO of less than 5 minutes, easily meeting the 1-hour requirement. In a disaster, you can promote the replica to a primary instance within minutes, meeting the 4-hour RTO.

Answer

Use AWS Database Migration Service (DMS) for continuous replication to a separate RDS instance in us-west-2.

Answer

Export data to S3 using AWS Backup and restore in us-west-2.

Answer

Take daily automated snapshots of the RDS instance and copy them to us-west-2.

Question 6

A cloud engineer is configuring an auto-scaling policy for a batch processing application that takes about 10 minutes to initialize before it can start processing jobs. To avoid premature termination of instances that have just started, what should the engineer configure?

Accepted Answer

Use a lifecycle hook to put the instance in a 'wait' state until initialization is complete. A lifecycle hook can put instances in a pending state until they complete initialization. Cooldown periods prevent scaling actions but do not prevent termination of new instances.

Answer

Disable scale-in for the first 10 minutes using a scheduled action

Answer

Set the health check grace period to 600 seconds

Answer

Increase the cooldown period to 600 seconds

Question 7

A cloud administrator wants to be notified immediately via email when a critical alert is triggered. Which notification channel should they configure?

Accepted Answer

Email. Email is a typical notification channel for alerts.

Answer

AWS Config

Answer

Amazon SNS

Answer

AWS CloudTrail

Question 8

A cloud administrator needs to view the console output of a VM that failed to boot. Which feature should they use to access the boot logs?

Accepted Answer

Console output / serial console. Cloud providers offer console output or serial console access to view boot logs. Screenshots are also available but console output is the direct log. CloudWatch Logs might capture logs if the OS sends them, but for boot issues, console output is the native method.

Answer

CloudWatch Logs agent

Answer

VM screenshot

Answer

System log from the hypervisor

Question 9

A cloud administrator is investigating a sudden increase in cost for a production environment. The administrator wants to identify the sources of the cost increase and implement a tagging strategy for cost allocation. Which TWO actions should the administrator take? (Choose two.)

Accepted Answer

Use the cloud provider's cost explorer to analyze cost drivers.. To identify cost sources and improve allocation, the administrator should use the cloud provider's cost explorer (e.g., AWS Cost Explorer) to analyze usage and costs, and implement a tagging strategy with environment and project tags for granular cost attribution.

Answer

Implement a rightsizing recommendation report.

Answer

Purchase Reserved Instances for all resources.

Answer

Create a budget alert for the total monthly cost.

Question 10

An organization wants to receive notifications in a Slack channel when a new VM instance is created. Which combination of cloud services should be used?

Accepted Answer

Logging service log-based metric and event-driven function with webhook. A logging service can trigger an event-driven function via a log-based metric when a VM is created, and the function sends a message to Slack via webhook.

Answer

Monitoring alert policy with Slack notification channel

Answer

Scheduler and event-driven function

Answer

Pub/sub messaging service and container service