Amazon DOP-C02 Practice Questions - Page 40

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Question 391

For AWS CloudFormation, which is true?

AWS SQS

AWS Lambda

AWS Kinesis

AWS SNS

Question 392

For AWS CloudFormation, which is true?

AWS CloudFormation

AWS OpsWorks

AWS ELB + EC2 with CLI Push

AWS Elastic Beanstalk

Question 393

For AWS CloudFormation, which is true?

Global

Availability Zone

Region

Placement Group

Question 394

For AWS CloudFormation, which is true?

Build the application out using AWS Cognito and web identity federation to allow users to log in using Facebook or Google Accounts. Once they are logged in, the secret token passed to that user is used to directly access resources on AWS, like AWS S3.

Use JWT or SAML compliant systems to build authorization policies. Users log in with a username and password, and are given a token they can use indefinitely to make calls against the photo infrastructure.

Use AWS API Gateway with a constantly rotating API Key to allow access from the client-side. Construct a custom build of the SDK and include S3 access in it.

Create an AWS oAuth Service Domain ad grant public signup and access to the domain. During setup, add at least one major social media site as a trusted Identity Provider for users.

Question 395

For AWS CloudFormation, which is true?

Create a global AWS CloudTrail Trail. Configure a script to aggregate the log data delivered to S3 once per week and deliver this to the CTO.

Use CloudWatch Events Rules with an SNS topic subscribed to all AWS API calls. Subscribe the CTO to an email type delivery on this SNS Topic.

Use AWS IAM credential reports to deliver a CSV of all uses of IAM User Tokens over time to the CTO.

Use AWS Config with an SNS subscription on a Lambda, and insert these changes over time into a DynamoDB table. Generate reports based on the contents of this table.

Question 396

What is the order of most-to-least rapidly-scaling (fastest to scale first)?

B, A, C

C, B, A

C, A, B

A, C, B

Question 397

For AWS CloudFormation, which is true?

Snapshots which are shared cannot be used as a basis for other snapshots.

You cannot share a snapshot containing an AWS Access Key ID or AWS Secret Access Key.

You cannot share unencrypted snapshots.

Snapshot restorations are restricted to the region in which the snapshots are created.

Question 398

For AWS CloudFormation, which is true?

Create a second ELB, Auto Scaling Launch Configuration, and Auto Scaling Group using the Launch Configuration. Create AMIs with all code pre-installed. Assign the new AMI to the second Auto Scaling Launch Configuration. Use Route53 Weighted Round Robin Records to adjust the proportion of traffic hitting the two ELBs.

Use the Blue-Green deployment method to enable the fastest possible rollback if needed. Create a full second stack of instances and cut the DNS over to the new stack of instances, and change the DNS back if a rollback is needed.

Create AMIs with all code pre-installed. Assign the new AMI to the Auto Scaling Launch Configuration, to replace the old one. Gradually terminate instances running the old code (launched with the old Launch Configuration) and allow the new AMIs to boot to adjust the traffic balance to the new code. On rollback, reverse the process by doing the same thing, but changing the AMI on the Launch Config back to the original code.

Migrate to use AWS Elastic Beanstalk. Use the established and well-tested Rolling Deployment setting AWS provides on the new Application Environment, publishing a zip bundle of the new code and adjusting the wait period to spread the deployment over time. Re-deploy the old code bundle to rollback if needed.

Question 399

What is required to achieve gigabit network throughput on EC2? You already selected cluster-compute, 10GB instances with enhanced networking, and your workload is already network-bound, but you are not seeing 10 gigabit speeds.

Enable biplex networking on your servers, so packets are non-blocking in both directions and there's no switching overhead.

Ensure the instances are in different VPCs so you don't saturate the Internet Gateway on any one VPC.

Select PIOPS for your drives and mount several, so you can provision sufficient disk throughput.

Use a placement group for your instances so the instances are physically near each other in the same Availability Zone.

Question 400

If you want CloudFormation stack status updates to show up in a continuous delivery system in as close to real time as possible, how should you achieve this?

Use a long-poll on the Resources object in your CloudFormation stack and display those state changes in the UI for the system.

Use a long-poll on the <code>ListStacksAPI</code> call for your CloudFormation stack and display those state changes in the UI for the system.

Subscribe your continuous delivery system to an SNS topic that you also tell your CloudFormation stack to publish events into.

Subscribe your continuous delivery system to an SQS queue that you also tell your CloudFormation stack to publish events into.

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