You work for a company that automatically tags photographs using artificial neural networks (ANNs), which run on GPUs using C++. You receive millions of images at a time, but only 3 times per day on average. These images are loaded into an AWS S3 bucket you control for you in a batch, and then the customer publishes a JSON-formatted manifest into another S3 bucket you control as well. Each image takes 10 milliseconds to process using a full GPU. Your neural network software requires 5 minutes to bootstrap. Image tags are JSON objects, and you must publish them to an S3 bucket.
Which of these is the best system architectures for this system?

Correct Answer:B
The Elastic Beanstalk option is incorrect because it requires a constantly-polling instance, which may break and costs money.
The Lambda fileet option is incorrect because AWS Lambda does not support GPU usage.
The OpsWorks stack option both requires a constantly-polling instance, and also requires complex timing and capacity planning logic.
The CIoudFormation option requires no polling, has no always-on instances, and allows arbitrarily fast processing by simply setting the instance count as high as needed.
Reference: http://docs.aws.amazon.com/Iambda/latest/dg/current-supported-versions.html

What is the scope of an EBS volume?

Correct Answer:D
An Amazon EBS volume is tied to its Availability Zone and can be attached only to instances in the same Availability Zone.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/resources.htmI

For AWS Auto Scaling, what is the first transition state an existing instance enters after leaving steady state in Standby mode?

Correct Answer:C
You can put any instance that is in an InService state into a Standby state. This enables you to remove the instance from service, troubleshoot or make changes to it, and then put it back into service. Instances in a Standby state continue to be managed by the Auto Scaling group. However, they are not an active part of your application until you put them back into service.
Reference: http://docs.aws.amazon.com/AutoScaling/latest/DeveIoperGuide/AutoScaIingGroupLifecycIe.html

You are building a Ruby on Rails application for internal, non-production use which uses IV|ySQL as a database. You want developers without very much AWS experience to be able to deploy new code with a single command line push. You also want to set this up as simply as possible. Which tool is ideal for this setup?

Correct Answer:D
Elastic BeanstaIk's primary mode of operation exactly supports this use case out of the box. It is simpler than all the other options for this question.
With Elastic Beanstalk, you can quickly deploy and manage applications in the AWS cloud without worrying about the infrastructure that runs those applications. AWS Elastic Beanstalk reduces management complexity without restricting choice or control. You simply upload your application, and Elastic Beanstalk automatically handles the details of capacity provisioning, load balancing, scaling, and application health monitoring.
Reference: http://docs.aws.amazon.com/elasticbeanstaIk/Iatest/dg/create_depIoy_Ruby_raiIs.html

What is a circular dependency in AWS CIoudFormation?

Correct Answer:C
To resolve a dependency error, add a DependsOn attribute to resources that depend on other resources in your template. In some cases, you must explicitly declare dependencies so that AWS CIoudFormation can create or delete resources in the correct order. For example, if you create an Elastic IP and a VPC
with an Internet gateway in the same stack, the Elastic IP must depend on the Internet gateway attachment. For additional information, see DependsOn Attribute.
Reference: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/troubleshooting.htm|#troub|eshootin g-errors-dependence-error