CV0-004 Practice Test 27 — 15 Questions

Question 1

Which deployment strategy minimizes risk by gradually shifting a small percentage of traffic to a new version before full rollout?

Accepted Answer

Canary deployment. A canary deployment minimizes risk by routing a small percentage of traffic (e.g., 5-10%) to the new version while the majority continues to use the stable version. This allows real-world validation of the new version under production load before a full rollout, and if issues are detected, traffic can be instantly redirected back to the old version. The strategy is named after the 'canary in a coal mine' concept, where early detection of problems prevents widespread impact.

Answer

In-place deployment

Answer

Rolling deployment

Answer

Blue-green deployment

Question 2

A cloud administrator is configuring automated scaling for a web application. The scaling policy should add two instances when CPU utilization exceeds 80% for five minutes. Which type of scaling policy should they implement?

Accepted Answer

Step scaling. Step scaling allows adding a specific number of instances based on a metric threshold breach.

Answer

Scheduled scaling

Answer

Dynamic scaling

Answer

Target tracking scaling

Question 3

A cloud operations team is configuring auto-scaling for a web application. They want to add two instances when CPU utilization exceeds 80% for five minutes, and remove one instance when CPU drops below 30% for five minutes. Which type of scaling policy should they use?

Accepted Answer

Step scaling. Step scaling allows adding or removing a specific number of instances based on the size of the alarm breach.

Answer

Simple scaling

Answer

Scheduled scaling

Answer

Target tracking scaling

Question 4

A cloud operations team is implementing automated patching for Linux servers using AWS Systems Manager Patch Manager. They need to ensure patches are applied with minimal disruption and have a rollback plan. Which TWO actions should they take? (Select TWO.)

Accepted Answer

Create AMI snapshots of instances before patching. Using maintenance windows ensures patches are applied during off-peak hours. Creating AMI snapshots before patching allows rollback if a patch causes issues.

Answer

Enable auto-scaling to replace instances if patching fails

Answer

Use AWS Config to verify patch compliance after patching

Answer

Set the patch baseline to automatically approve all patches

Question 5

A cloud engineer wants to be notified when the average CPU utilization of an auto-scaling group exceeds 80% for 5 minutes. Which alerting mechanism should be used?

Accepted Answer

AWS CloudWatch Alarm. CloudWatch Alarms can monitor metrics and trigger actions when a threshold is breached for a specified period.

Answer

AWS Systems Manager OpsCenter

Answer

AWS Config rule

Answer

AWS Trusted Advisor

Question 6

A cloud architect is designing a monitoring solution for a web application. Which service should they use to collect and visualize metrics such as CPU utilization and network throughput?

Accepted Answer

AWS CloudWatch. AWS CloudWatch is the service for collecting and visualizing metrics on AWS.

Answer

AWS CloudTrail

Answer

AWS Config

Answer

AWS Trusted Advisor

Question 7

A cloud engineer is configuring an auto-scaling group and wants to add instances based on a sustained increase in CPU utilization above 80% for 5 minutes. Which scaling policy type should be used?

Accepted Answer

Step scaling policy. Step scaling policies allow you to define steps that respond to metric breaches with specific actions, such as adding a certain number of instances when CPU exceeds 80% for a specified period.

Answer

Target tracking scaling policy

Answer

Simple scaling policy

Answer

Scheduled scaling policy

Question 8

A cloud administrator is configuring an auto-scaling group for a stateless application. The scaling policy should add 2 instances when the average CPU utilization exceeds 80% for 5 minutes, and remove 1 instance when CPU drops below 40% for 5 minutes. Which type of scaling policy should be used?

Accepted Answer

Step scaling policy. Step scaling allows specifying different scaling adjustments based on the size of the alarm breach. It can add a specific number of instances for a high CPU breach and remove a specific number for a low CPU breach.

Answer

Simple scaling policy

Answer

Scheduled scaling policy

Answer

Target tracking scaling policy

Question 9

A cloud engineer needs to implement a solution to automatically scale an application based on the number of messages in an SQS queue. The goal is to keep the queue length short. Which Auto Scaling policy type should the engineer use?

Accepted Answer

Target tracking scaling. Target tracking scaling maintains a target metric value (e.g., queue length), adjusting capacity automatically.

Answer

Step scaling

Answer

Simple scaling

Answer

Scheduled scaling

Question 10

An organization is using Azure and wants to implement a patch management strategy with minimal disruption. Which TWO actions should they take? (Select TWO.)

Accepted Answer

Implement rollback procedures. Maintenance windows schedule updates during low activity, and rollback procedures enable recovery if issues occur.

Answer

Use only manual patching

Answer

Patch all servers simultaneously

Answer

Disable automatic updates on all VMs

Question 11

Which GCP service provides centralized log management and analysis with the ability to create log-based metrics and alerts?

Accepted Answer

GCP Cloud Logging. GCP Cloud Logging is the centralized logging service that supports log-based metrics and alerting.

Answer

GCP Cloud Monitoring

Answer

GCP Cloud Audit Logs

Answer

GCP Cloud Trace

Question 12

A company uses AWS and wants to verify that its disaster recovery plan meets the defined RTO and RPO objectives. Which type of testing should be performed to simulate a real failover scenario without impacting production?

Accepted Answer

Full-scale DR drill. A full-scale DR drill involves actually failing over to the DR environment to validate RTO/RPO without affecting production if isolated.

Answer

Tabletop exercise

Answer

Chaos engineering

Answer

Partial failover test

Question 13

A company is planning to migrate to AWS and wants to achieve the lowest possible compute costs for a steady-state workload that will run 24/7. Which purchasing option should be recommended?

Accepted Answer

Reserved Instances. Reserved Instances offer a significant discount over On-Demand for consistent usage. Spot Instances are cheaper but can be interrupted. Savings Plans are also cost-effective, but Reserved Instances are a traditional choice for steady-state.

Answer

Spot Instances

Answer

On-Demand Instances

Answer

Dedicated Hosts

Question 14

A cloud engineer is planning a disaster recovery drill for a critical application that spans multiple availability zones. The drill must validate RTO and RPO without affecting production. Which THREE actions should the engineer include? (Choose three.)

Accepted Answer

Perform a failover to the secondary environment using production data. Performing a failover in a non-production environment validates recovery steps. Monitoring recovery time measures RTO, and verifying data integrity checks RPO.

Answer

Terminate production instances to simulate a disaster

Answer

Delete all backups to ensure they are not used during the drill

Question 15

A cloud administrator needs to receive real-time notifications when CPU utilization exceeds 90% on a production server. Which AWS service should be used to trigger an alert based on a metric threshold?

Accepted Answer

CloudWatch Alarms. CloudWatch Alarms monitor metrics and trigger actions when a threshold is breached. SNS is a notification channel, not a metric monitor. CloudTrail logs API calls, and Config tracks configuration changes.

Answer

Amazon SNS

Answer

AWS Config

Answer

AWS CloudTrail