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Question 532 - SAA-C03 discussion

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A solutions architect is using an AWS CloudFormation template to deploy a three-tier web application. The web application consists of a web tier and an application tier that stores and retrieves user data in Amazon DynamoDB tables. The web and application tiers are hosted on

Amazon EC2 instances, and the database tier is not publicly accessible. The application EC2 instances need to access the DynamoDB tables without exposing API credentials in the template.

What should the solutions architect do to meet these requirements?

A.
Create an IAM role to read the DynamoDB tables. Associate the role with the application instances by referencing an instance profile.
Answers
A.
Create an IAM role to read the DynamoDB tables. Associate the role with the application instances by referencing an instance profile.
B.
Create an IAM role that has the required permissions to read and write from the DynamoDB tables. Add the role to the EC2 instance profile, and associate the instance profile with the application instances.
Answers
B.
Create an IAM role that has the required permissions to read and write from the DynamoDB tables. Add the role to the EC2 instance profile, and associate the instance profile with the application instances.
C.
Use the parameter section in the AWS CloudFormation template to have the user input access and secret keys from an already-created IAM user that has the required permissions to read and write from the DynamoDB tables.
Answers
C.
Use the parameter section in the AWS CloudFormation template to have the user input access and secret keys from an already-created IAM user that has the required permissions to read and write from the DynamoDB tables.
D.
Create an IAM user in the AWS CloudFormation template that has the required permissions to read and write from the DynamoDB tables. Use the GetAtt function to retrieve the access and secret keys, and pass them to the application instances through the user data.
Answers
D.
Create an IAM user in the AWS CloudFormation template that has the required permissions to read and write from the DynamoDB tables. Use the GetAtt function to retrieve the access and secret keys, and pass them to the application instances through the user data.
Suggested answer: B

Explanation:

it allows the application EC2 instances to access the DynamoDB tables without exposing API credentials in the template. By creating an IAM role that has the required permissions to read and write from the DynamoDB tables and adding it to the EC2 instance profile, the application instances can use temporary security credentials that are automatically rotated by AWS. This is a secure and best practice way to grant access to AWS resources from EC2 instances. Reference:

IAM Roles for Amazon EC2 Using Instance Profiles

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asked 16/09/2024
ce temp2
42 questions
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