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NEW QUESTION 46
You are using CloudFormation to launch an EC2 instance and then configure an application after the instance is launched. You need the stack creation of the ELB and Auto Scaling to wait until the EC2 instance is launched and configured properly. How do you do this?

• A. Use a CreationPolicy to wait for the creation of the other dependent resources >/
• B. It is not possible for the stack creation to wait until one service is created and launched
• C. Use the WaitCondition resource to hold the creation of the other dependent resources
• D. Use the HoldCondition resource to hold the creation of the other dependent resources

Answer: A

Explanation:
Explanation
When you provision an Amazon EC2 instance in an AWS Cloud Formation stack, you might specify additional actions to configure the instance, such as install software packages or bootstrap applications. Normally, CloudFormation proceeds with stack creation after the instance has been successfully created. However, you can use a Creation Pol icy so that CloudFormation proceeds with stack creation only after your configuration actions are done. That way you'll know your applications are ready to go after stack creation succeeds.
A Creation Policy instructs CloudFormation to wait on an instance until CloudFormation receives the specified number of signals Option A is invalid because this is possible Option B is invalid because this is used make AWS CloudFormation pause the creation of a stack and wait for a signal before it continues to create the stack For more information on this, please visit the below URL:
* https://aws.amazon.com/blogs/devops/use-a-creationpolicy-to-wait-for-on-instance-configurations/

NEW QUESTION 47
You have created a DynamoDB table for an application that needs to support thousands of users. You need to
ensure that each user can only access their own data in a particular table. Many users already have accounts
with a third-party identity provider, such as Facebook, Google, or Login with Amazon. How would you
implement this requirement?
Choose 2 answers from the options given below.

• A. UseWeb identity federation and register your application with a third-partyidentity provider such as
  Google, Amazon, or Facebook.
• B. Createan 1AM role which has specific access to the DynamoDB table.
• C. Createan 1AM User for all users so that they can access the application.
• D. Usea third-party identity provider such as Google, Facebook or Amazon so users canbecome an
  AWS1AM User with access to the application.

Answer: A,B

Explanation:
Explanation
The AWS Documentation mentions the following
With web identity federation, you don't need to create custom sign-in code or manage your own user identities.
Instead, users of your app can sign in using a well-known identity provider (IdP) -such as Login with
Amazon, Facebook, Google, or any other OpenID Connect (OIDC)-compatible IdP, receive an authentication
token, and then exchange that token for temporary security credentials in AWS that map to an 1AM role with
permissions to use the resources in your AWS account. Using an IdP helps you keep your AWS account
secure, because you don't have to embed and distribute long-term security credentials with your application.
For more information on Web Identity federation, please visit the below url
* http://docs.ws.amazon.com/IAM/latest/UserGuide/id_roles_providers_oidc.html

NEW QUESTION 48
A company is testing a web application that runs on Amazon EC2 instances behind an Application Load Balancer. The instances run in an Auto Scaling group across multiple Availability Zones. The company uses a blue/green deployment process with immutable instances when deploying new software.
During testing, users are being automatically logged out of the application at random times. Testers also report that, when a new version of the application is deployed, all users are logged out. The Development team needs a solution to ensure users remain logged in across scaling events and application deployments.
What is the MOST efficient way to ensure users remain logged in?

• A. Store user session information in an Amazon S3 bucket and modify the application to read session information from the bucket.
• B. Enable smart sessions on the load balancer and modify the application to check for an existing session.
• C. Modify the application to store user session information in an Amazon ElastiCache cluser.
• D. Enable session sharing on the load balancer and modify the application to read from the session store.

Answer: C

NEW QUESTION 49
A web application is being actively developed by multiple development teams within your organization.
You have created a self-service portal-driven by AWS CloudFormation and the AWS APIs-that allows testers to select a code branch containing a new feature that they want to test.
The portal will then provision an environment and deploy the right branch of code to it.
Recently you have noticed that a large number of environments contain broken builds.
You want to introduce a set of automated browser tests that are executed on a new environment before the environment is available to the tester.
This way a tester does not waste time trying to test new features in a broken environment. Select a suitable way to implement such a feature into the existing self-service portal:

• A. Configure a centralized test server that hosts an automated browser testing framework.
  Include an Amazon SES email resource under the outputs section of your AWS CloudFormation template.
  This we send an email to your centralized test server, informing it that the environment is ready for tests.
• B. Pass the test scripts to the cfn-init service via the "tests" section of the AWS::CloudFormation::Init metadata.
  Cfn-init will then execute these tests and return the result to the AWS CloudFormation service.
• C. Configure a centralized test server that hosts an automated browser testing framework.
  Use an AWS CloudFormation custom resource to notify the centralized test server, via an Amazon SNS topic, that a new environment has been initialized.
  The centralized test server can then execute the tests before sending the results back to the AWS CloudFormation service.
• D. Specify your automated tests in the "tests" section of the AWS CloudFormation template.
  AWS CloudFormation will then execute the tests on your behalf as part of the environment build.

Answer: C

NEW QUESTION 50
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