SOA-C01 sample questions

Question 1

A company hosts its website in the us-east-1 Region. The company is preparing to deploy its website into the eu-central-1 Region. Website visitors who are located in Europe should access the website that is hosted in eu-central-1. All other visitors access the website that is hosted in us-east-1. The company uses Amazon Route 53 to manage the website's DNS records.

Which routing policy should a SysOps administrator apply to the Route 53 record set to meet these requirements?

Accepted Answer

Multivalue answer routing policy

Answer

Geolocation routing policy

Answer

Geoproximity routing policy

Answer

Latency routing policy

Question 2

A company is running a flash sale on its website. The website is hosted on burstable performance Amazon EC2 instances in an Auto Scaling group. The Auto Scaling group is configured to launch instances when the CPU utilization is above 70%.

A couple of hours into the sale, users report slow load times and error messages for refused connections. A SysOps administrator reviews Amazon CloudWatch metrics and notices that the CPU utilization is at 20% across the entire fleet of instances.

The SysOps administrator must restore the website's functionality without making changes to the network infrastructure.

Which solution will meet these requirements?

Accepted Answer

Move the website to a different AWS Region that is closer to the users.

Answer

Activate unlimited mode for the instances in the Auto Scaling group.

Answer

Implement an Amazon CloudFront distribution to offload the traffic from the Auto Scaling group.

Answer

Reduce the desired size of the Auto Scaling group to artificially increase CPU average utilization.

Question 3

A company hosts a web application on an Amazon EC2 instance in a production VPC. Client connections to the application are failing. A SysOps administrator inspects the VPC flow logs and finds the following entry:

2 111122223333 eni- 192.0.2.15 203.0.113.56 40711 443 6 1 40 1418530010 1418530070 REJECT OK

What is a possible cause of these failed connections?

Accepted Answer

A security group is denying traffic on port 443.

Answer

The EC2 instance is shut down.

Answer

The network ACL is blocking HTTPS traffic.

Answer

The VPC has no internet gateway attached.

Question 4

A company uses an Amazon Elastic File System (Amazon EFS) file system to share files across many Linux Amazon EC2 instances. A SysOps administrator notices that the file system's PercentlOLimit metric is consistently at 100% for 15 minutes or longer. The SysOps administrator also notices that the application that reads and writes to that file system is performing poorly. They application requires high throughput and IOPS while accessing the file system.

What should the SysOps administrator do to remediate the consistently high PercentlOLimit metric?

Accepted Answer

Create a new EFS file system that uses Max I/O performance mode. Use AWS DataSync to migrate data to the new EFS file system.

Answer

Create an EFS lifecycle policy to transition future files to the Infrequent Access (IA) storage class to improve performance. Use AWS DataSync to migrate existing data to IA storage.

Answer

Modify the existing EFS file system and activate Max I/O performance mode.

Answer

Modify the existing EFS file system and activate Provisioned Throughput mode.

Question 5

A SysOps administrator is notified that an Amazon EC2 instance has stopped responding. The AWS Management Console indicates that the system checks are failing.

What should the administrator do first to resolve this issue?

Accepted Answer

stop and then start the EC2 instance so that it can be launched on a new host.

Answer

Reboot the EC2 instance so it can be launched on a new host.

Answer

Terminate the EC2 instance and relaunch it.

Answer

View the AWS CloudTrail log to investigate what changed on the EC2 instance.

Question 6

A SysOps administrator has created a VPC that contains a public subnet and a private subnet. Amazon EC2 instances that were launched in the private subnet cannot access the internet. The default network ACL is active on all subnets in the VPC, and all security groups allow all outbound traffic:

Which solution will provide the EC2 instances in the private subnet with access to the internet?

Accepted Answer

Create a NAT gateway in the public subnet. Create a route from the private subnet to the NAT gateway.

Answer

Create a NAT gateway in the public subnet. Create a route from the public subnet to the NAT gateway,

Answer

Create a NAT gateway in the private subnet. Create a route from the public subnet to the NAT gateway.

Answer

Create a NAT gateway in the private subnet. Create a route from the private subnet to the NAT gateway.

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