Practice Test 4 | AWS Certified Solutions Architect Associate | SAA-C03 | Dumps | Mock Test
A website is hosted on two EC2 instances that sit behind an Elastic Load Balancer. The response time of the website has slowed dramatically, and customers are ordering less due to the wait time. Troubleshooting showed one of the EC2 instances failed and left just one instance running. What is the best course of action to prevent this from happening in the future?
A. Change the instance size to the maximum available to compensate for failure
B. Use CloudWatch to monitor the VPC Flow Logs for the VPC the instances are deployed in
C. Configure the ELB to perform health checks on the EC2 instances and implement auto-scaling
D. Replicate the existing configuration in several regions for failover
Explanation:
Answer:C
Correct:
- C. Using the elastic load balancer to perform health checks will determine whether or not to remove a non- or underperforming instance and have the auto-scaling group launch a new instance.
Incorrect:
- A. Increasing the instance size doesn’t prevent failure of one or both the instances, therefore the website can still become slow or unavailable
- B. Monitoring the VPC flow logs for the VPC will capture VPC traffic, not traffic for the EC2 instance. You would need to create a flow log for a network interface.
- D. Replicating the same two instance deployment may not prevent failure of instances and could still result in the website becoming slow or unavailable.
Reference:
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