Amazon Web Services SOA-C01 Practice Exam Dumps 2025

A company's application infrastructure was deployed using AWS CloudFormation and is composed of Amazon EC2 instances behind an Application Load Balancer. The instances run an EC2 Auto Scaling group across multiple Availability Zones. When releasing a new version of the application, the update deployment must avoid DNS changes and allow rollback.

Which solution should a sysops administrator use to meet the deployment requirements for this new release?

Options:

Configure the Auto Scaling group to use lifecycle hooks. Deploy now instances with the new application version. Complete the lifecycle hook action once healthy.

Create a new Amazon Machine Image (AMI) containing the updated code. Create a launch configuration with the AMI. Update Auto Scaling group to use the new lauch configuration.

Deploy a second CloudFormation stack. Wait for the application to be available Cut over to the new Application Load Balancer

Modify the CloudFormation template to use an AutoScalingReplacingUpdate policy. Update the stack. Perform a second update with the new release

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Question 2

A SysOps Administrator noticed that the cache hit ratio for an Amazon CloudFront distribution is less than 10%. Which collection of configuration changes will increase the cache hit ratio for the distribution? (Select two.)

Options:

Ensure that only required cookies, query strings, and headers are forwarded in the Cache Behavior Settings

Change the Viewer Protocol Policy to use HTTPS only

Configure the distribution to use presigned cookies and URLs to restrict access to the distribution

Enable automatic compression of objects in the Cache Behavior Settings

Increase the CloudFront time to live (TTL) settings in the Cache Behavior Settings.

Question 3

A financial service company is running distributed computing software to manage a fleet of 20 servers for their calculations. There are 2 control nodes and 18 worker nodes to run the calculations. Worker nodes can be automatically started by the control nodes when required. Currently, all nodes are running on demand, and the worker nodes are uses for approximately 4 hours each day.

Which combination of actions will be most cost-effective? (Select Two)

Options:

Use dedicated Hosts for the control nodes.

Use reserved instances for the control nodes.

Use reserved instances for the worker nodes.

Use spot instances for the control nodes and On-demand instances if there is no Spot availability.

Use spot instances for the worker nodes and On-demand instances if there is no spot availability.

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