AWS Certified Solutions Architect - Professional

AWS Certified Solutions Architect - Professional practice questions, page 21 of 41, with answer review and explanations.

Question 101

How can an EBS volume that is currently attached to an EC2 instance be migrated from one Availability Zone to another?

  1. Detach the volume and attach it to another EC2 instance in the other AZ.
  2. Simply create a new volume in the other AZ and specify the original volume as the source.
  3. Create a snapshot of the volume, and create a new volume from the snapshot in the other AZ.
  4. Detach the volume, then use the ec2-migrate-volume command to move it to another AZ.

Question 102

After launching an instance that you intend to serve as a NAT (Network Address Translation) device in a public subnet you modify your route tables to have the NAT device be the target of internet bound traffic of your private subnet. When you try and make an outbound connection to the internet from an instance in the private subnet, you are not successful. Which of the following steps could resolve the issue?

  1. Disabling the Source/Destination Check attribute on the NAT instance
  2. Attaching an Elastic IP address to the instance in the private subnet
  3. Attaching a second Elastic Network Interface (ENI) to the NAT instance, and placing it in the private subnet
  4. Attaching a second Elastic Network Interface (ENI) to the instance in the private subnet, and placing it in the public subnet

Question 103

Your application provides data transformation services. Files containing data to be transformed are first uploaded to Amazon S3 and then transformed by a fleet of spot EC2 instances. Files submitted by your premium customers must be transformed with the highest priority. How should you implement such a system?

  1. Use a DynamoDB table with an attribute defining the priority level. Transformation instances will scan the table for tasks, sorting the results by priority level.
  2. Use Route 53 latency based-routing to send high priority tasks to the closest transformation instances.
  3. Use two SQS queues, one for high priority messages, the other for default priority. Transformation instances first poll the high priority queue; if there is no message, they poll the default priority queue.
  4. Use a single SQS queue. Each message contains the priority level. Transformation instances poll high-priority messages first.

Question 104

Which of the following are characteristics of Amazon VPC subnets? (Choose two.)

  1. Each subnet spans at least 2 Availability Zones to provide a high-availability environment.
  2. Each subnet maps to a single Availability Zone.
  3. CIDR block mask of /25 is the smallest range supported.
  4. By default, all subnets can route between each other, whether they are private or public.
  5. Instances in a private subnet can communicate with the Internet only if they have an Elastic IP.

Question 105

In AWS, which security aspects are the customer's responsibility? (Choose four.)

  1. Security Group and ACL (Access Control List) settings
  2. Decommissioning storage devices
  3. Patch management on the EC2 instance's operating system
  4. Life-cycle management of IAM credentials
  5. Controlling physical access to compute resources
  6. Encryption of EBS (Elastic Block Storage) volumes