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Amazon AWS Certified Developer - Associate Sample Questions (Q732-Q737):

NEW QUESTION # 732
A company has a serverless application that uses an Amazon API Gateway API to invoke an AWS Lambda function. A developer creates a fix for a defect in the Lambda function code. The developer wants to deploy this fix to the production environment.
To test the changes, the developer needs to send 10% of the live production traffic to the updated Lambda function version.
Which combination of steps will meet these requirements? (Choose two.)

A. Set up a routing policy on a Network Load Balancer. Configure 10% of the traffic to go to the new Lambda function version.
B. Set up a weighted routing policy by using Amazon Route 53. Configure 10% of the traffic to go to the new Lambda function version.
C. Publish a new version of the Lambda function that contains the updated code.
D. Set up a new stage in API Gateway with a new Lambda function version. Enable weighted routing in API Gateway stages.
E. Create an alias for the Lambda function. Configure weighted routing on the alias. Specify a 10% weight for the new Lambda function version.

Answer: C,E

NEW QUESTION # 733
An application uses AWS X-Ray to generate a large amount of trace data on an hourly basis. A developer wants to use filter expressions to limit the returned results through user-specified custom attributes.
How should the developer use filter expressions to filter the results in X-Ray?

A. Add custom attributes as metadata in the segment document.
B. Add custom attributes as annotations in the segment document.
C. Create new sampling rules that are based on custom attributes.
D. Add custom attributes as new segment fields in the segment document.

Answer: B

Explanation:
In AWS X-Ray, filter expressions can filter trace data based on indexed fields that X-Ray can query efficiently. Custom data can be added to segments in two main ways: annotations and metadata. The critical difference is that annotations are indexed and can be used for filtering, while metadata is not indexed and is intended for additional diagnostic context that you do not typically query on.
Therefore, if the developer wants user-specified custom attributes to be usable in X-Ray filter expressions, the developer should record those attributes as annotations in the segment document. Once recorded as annotations, the developer can write filter expressions that match annotation keys/values and return only the relevant traces.
Option B is incorrect because metadata is not indexed and cannot be used in filter expressions for trace search the same way annotations can.
Option C is incorrect because segment documents have a defined schema; adding arbitrary "new segment fields" is not the intended method for searchable custom attributes.
Option D is unrelated: sampling rules control which requests get traced in the first place. They are not used to filter returned results by custom attributes after traces are recorded.

NEW QUESTION # 734
A developer is creating an AWS Step Functions state machine to handle an order processing workflow. When the state machine receives an order, the state machine pauses until the order has been confirmed. A record that is added to an Amazon DynamoDB table by another service confirms each order.
The developer must complete the order processing workflow.
Which solution will meet this requirement?

A. Subscribe an AWS Lambda function to a DynamoDB table stream. Configure the Lambda function to run when a new record is added to the table.
When the Lambda function receives the appropriate record, run the redrive execution command on the running state machine.
B. Update the state machine to query the DynamoDB table by using the DynamoDB GetItem state to determine whether a record exists. If the record does exist, continue to the next state. If the record does not exist, wait 5 minutes and check again.
C. Subscribe an AWS Lambda function to the DynamoDB table stream. Configure the Lambda function to run when a new record is added to the table.
When the Lambda function receives the appropriate record, stop the current state machine invocation and start a new invocation.
D. Invoke an AWS Lambda function from the state machine. Configure the Lambda function to continuously poll the DynamoDB table for the appropriate record and to return when a record exists. Continue the state machine invocation when the Lambda function returns. If the Lambda function times out, then fail the state machine.

Answer: A

NEW QUESTION # 735
A developer is creating an application that includes an Amazon API Gateway REST API in the us-east-2 Region. The developer wants to use Amazon CloudFront and a custom domain name for the API. The developer has acquired an SSL/TLS certificate for the domain from a third-party provider.
How should the developer configure the custom domain for the application?

A. Import the SSL/TLS certificate into AWS Certificate Manager (ACM) in the same Region as the API. Create a DNS A record for the custom domain.
B. Import the SSL/TLS certificate into AWS Certificate Manager (ACM) in the same Region as the API. Create a DNS CNAME record for the custom domain.
C. Import the SSL/TLS certificate into AWS Certificate Manager (ACM) in the us-east-1 Region. Create a DNS CNAME record for the custom domain.
D. Import the SSL/TLS certificate into CloudFront. Create a DNS CNAME record for the custom domain.

Answer: C

Explanation:
Amazon API Gateway is a service that enables developers to create, publish, maintain, monitor, and secure APIs at any scale. Amazon CloudFront is a content delivery network (CDN) service that can improve the performance and security of web applications. The developer can use CloudFront and a custom domain name for the API Gateway REST API. To do so, the developer needs to import the SSL/TLS certificate into AWS Certificate Manager (ACM) in the us-east-1 Region. This is because CloudFront requires certificates from ACM to be in this Region. The developer also needs to create a DNS CNAME record for the custom domain that points to the CloudFront distribution.
Reference:
[What Is Amazon API Gateway? - Amazon API Gateway]
[What Is Amazon CloudFront? - Amazon CloudFront]
[Custom Domain Names for APIs - Amazon API Gateway]

NEW QUESTION # 736
A developer is refactoring an AWS Lambda function that uses static parameters that are defined in environment variables. The developer needs to integrate the Lambda function with an AWS AppConfig application. The developer has already configured IAM roles for the AWS AppConfig application and the Lambda function. Which solution will meet this requirement with the LEAST amount of changes to the code?

A. Use the AWS AppConfig client to create a Lambda layer. Add the layer to the function.
B. Modify the function code to add the StartConfigurationSession API action and the GetLatestConfiguration API action.
C. Create an AWS AppConfig extension. Add the ON_DEPLOYMENT_COMPLETE action point and add the Lambda function URI as the target.
D. Add the AWS AppConfig agent Lambda extension layer. Use the agent endpoint from within the function code.

Answer: D

Explanation:
The AWS AppConfig Agent Lambda extension is designed to simplify integration. It runs as a sidecar process that manages the fetching and local caching of configurations. Instead of adding complex AWS SDK code for session management (Option D), the developer simply calls a local HTTP endpoint (provided by the agent) to retrieve the config. This results in the least code change and better performance due to the agent ' s built-in caching.

NEW QUESTION # 737
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