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| Section | Weight | Objectives |
|---|---|---|
| Troubleshooting and Optimization | 18% | - Assist in a root cause analysis
|
| Security | 26% | - Manage sensitive data in application code
|
| Deployment | 24% | - Test applications in development environments
|
| Development with AWS Services | 32% | - Develop code for applications hosted on AWS
|
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NEW QUESTION # 49
A developer wants to deploy a new version of an AWS Elastic Beanstalk application. During deployment, the application must maintain full capacity and avoid service interruption. Additionally, the developer must minimize the cost of additional resources that support the deployment.
Which deployment method should the developer use to meet these requirements?
Answer: A
Explanation:
The immutable deployment method is the best option for this scenario, because it meets the requirements of maintaining full capacity, avoiding service interruption, and minimizing the cost of additional resources.
The immutable deployment method creates a new set of instances in a separate Auto Scaling group and deploys the new version of the application to them. Then, it swaps the new instances with the old ones and terminates the old instances. This way, the application maintains full capacity during the deployment and avoids any downtime. The cost of additional resources is also minimized, because the new instances are only created for a short time and then replaced by the old ones.
The other deployment methods do not meet all the requirements:
* The all at once method deploys the new version to all instances simultaneously, which causes a short period of downtime and reduced capacity.
* The rolling with additional batch method deploys the new version in batches, but for the first batch it creates new instances instead of using the existing ones. This increases the cost of additional resources and reduces the capacity of the original environment.
* The blue/green method creates a new environment with a new set of instances and deploys the new version to them. Then, it swaps the URLs between the old and new environments. This method maintains full capacity and avoids service interruption, but it also increases the cost of additional resources significantly, because it duplicates the entire environment.
NEW QUESTION # 50
A company receives food orders from multiple partners. The company has a microservices application that uses Amazon API Gateway APIs with AWS Lambda integration. Each partner sends orders by calling a customized API that is exposed through API Gateway. The API call invokes a shared Lambda function to process the orders.
Partners need to be notified after the Lambda function processes the orders. Each partner must receive updates for only the partner's own orders. The company wants to add new partners in the future with the fewest code changes possible.
Which solution will meet these requirements in the MOST scalable way?
Answer: B
Explanation:
Amazon Simple Notification Service (Amazon SNS) is a fully managed messaging service that enables pub/sub communication between distributed systems. The developer can create an SNS topic and configure the Lambda function to publish messages with specific attributes to the topic. The developer can subscribe each partner to the SNS topic and apply the appropriate filter policy to the topic subscriptions. This way, each partner will receive updates for only their own orders based on the message attributes. This solution will meet the requirements in the most scalable way and allow adding new partners in the future with minimal code changes.
Reference:
[Amazon Simple Notification Service (SNS)]
[Filtering Messages with Attributes - Amazon Simple Notification Service]
NEW QUESTION # 51
A company has an AWS Step Functions state machine named myStateMachine. The company configured a service role for Step Functions. The developer must ensure that only the myStateMachine state machine can assume the service role.
Which statement should the developer add to the trust policy to meet this requirement?
Answer: B
Explanation:
Comprehensive Detailed Explanation with all AWS Reference
Why Option A is Correct:
The ArnLike condition with the specific ARN for myStateMachine ensures that only this state machine can assume the role. The format urn:aws:states is correct for specifying Step Functions resources.
Why Other Options are Incorrect:
Option B: Wildcards (*) in the ARN allow more resources to assume the role, which violates the requirement.
Option C: This condition restricts the account but not the specific state machine.
Option D: A StringNotEquals condition is used to deny specific values, which does not ensure exclusivity for the desired state machine.
AWS Documentation Reference:
IAM Trust Policies for Step Functions
NEW QUESTION # 52
A company's AWS accounts are in an organization in AWS Organizations. An application in Account A uses environment variables that are stored as parameters in AWS Systems Manager Parameter Store. A developer is creating a new application in Account B that needs to use the same environment variables.
The application in Account B needs access to the parameters in Account A without duplicating the parameters into Account B.
Which solution will meet these requirements with the LEAST operational overhead?
Answer: D
NEW QUESTION # 53
A developer creates an AWS Lambda function to publish messages to an Amazon SNS topic. All message content must be encrypted in transit and at rest between AWS Lambda and Amazon SNS.
A portion of the Lambda execution role policy is shown:
"Effect": "Allow",
"Action": "sns:Publish",
"Resource": "arn:aws:sns:us-east-1:1234567890:secure-topic"
Which combination of steps should the developer take to meet these requirements? (Select TWO.)
Answer: A,B
Explanation:
Amazon SNS supports server-side encryption (SSE) using AWS KMS to protect message content at rest.
Enabling SSE on the SNS topic ensures that all messages published to the topic are encrypted using a customer-managed or AWS-managed KMS key. AWS documentation explicitly states that SSE is the mechanism for encrypting SNS messages stored within the service.
For encryption in transit, AWS services rely on HTTPS/TLS. To enforce this at the IAM policy level, AWS recommends using the global condition key aws:SecureTransport. By adding an explicit Deny statement when "aws:SecureTransport": "false", the policy ensures that any request not using HTTPS is rejected. This is a common AWS security best practice and is documented across multiple AWS services.
Option E correctly enforces encryption in transit. Option B is incorrect because denying when SecureTransport is true would block valid HTTPS requests. Option D is invalid because sns:Protocol applies to subscription protocols (such as email or HTTP endpoints), not to Lambda publishing actions. Option C (VPC endpoint) is not required because Lambda-to-SNS traffic is already encrypted over TLS by default.
Therefore, enabling SNS server-side encryption and enforcing HTTPS via an IAM deny condition fully satisfies the encryption-at-rest and encryption-in-transit requirements.
NEW QUESTION # 54
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