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| Section | Weight | Objectives |
|---|---|---|
| Development with AWS Services | 32% | - AWS core services development
|
| Deployment | 24% | - Infrastructure as code
|
| Troubleshooting and Optimization | 18% | - Monitoring and logging
|
| Security | 26% | - Application authentication and authorization
|
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NEW QUESTION # 621
A developer is building an application that uses AWS API Gateway APIs. AWS Lambda function, and AWS Dynamic DB tables. The developer uses the AWS Serverless Application Model (AWS SAM) to build and run serverless applications on AWS. Each time the developer pushes of changes for only to the Lambda functions, all the artifacts in the application are rebuilt.
The developer wants to implement AWS SAM Accelerate by running a command to only redeploy the Lambda functions that have changed.
Which command will meet these requirements?
Answer: A
Explanation:
The command that will meet the requirements is sam sync -watch. This command enables AWS SAM Accelerate mode, which allows the developer to only redeploy the Lambda functions that have changed. The -watch flag enables file watching, which automatically detects changes in the source code and triggers a redeployment. The other commands either do not enable AWS SAM Accelerate mode, or do not redeploy the Lambda functions automatically.
NEW QUESTION # 622
A developer is testing an AWS Lambda function. The developer invokes the Lambda function by using a function URL with an AWS_IAM authentication type. The invocation fails.
The developer confirms that the function URL is correct and that the function's execution role has the lambda:InvokeFunctionUrl permission for the correct resource. However, the invocation continues to fail.
The developer must successfully invoke the Lambda function.
Which solution will meet this requirement?
Answer: A
Explanation:
When a Lambda function URL is configured with the AWS_IAM authentication type, the caller must authenticate the HTTP request with IAM. That requires signing the request using AWS Signature Version 4 (SigV4) with credentials that have permission to invoke the function URL.
The function's execution role permissions do not authorize the inbound request; the caller's signed request does.
NEW QUESTION # 623
A developer is investigating an issue in part of a company's application. In the application messages are sent to an Amazon Simple Queue Service (Amazon SQS) queue The AWS Lambda function polls messages from the SQS queue and sends email messages by using Amazon Simple Email Service (Amazon SES) Users have been receiving duplicate email messages during periods of high traffic.
Which reasons could explain the duplicate email messages? (Select TWO.)
Answer: C
Explanation:
* SQS Delivery Behavior: Standard SQS queues guarantee at-least-once delivery, meaning messages may be processed more than once. This can lead to duplicate emails in this scenario.
* Visibility Timeout: If the visibility timeout on the SQS queue is too short, a message might become visible for another consumer before the first Lambda function finishes processing it. This can also lead to duplicates.
NEW QUESTION # 624
A company hosts a client-side web application for one of its subsidiaries on Amazon S3. The web application can be accessed through Amazon CloudFront from https://www.example.com. After a successful rollout, the company wants to host three more client-side web applications for its remaining subsidiaries on three separate S3 buckets.
To achieve this goal, a developer moves all the common JavaScript files and web fonts to a central S3 bucket that serves the web applications. However, during testing, the developer notices that the browser blocks the JavaScript files and web fonts.
What should the developer do to prevent the browser from blocking the JavaScript files and web fonts?
Answer: B
NEW QUESTION # 625
A company is preparing to migrate an application to the company's first AWS environment.
Before this migration, a developer is creating a proof-of-concept application to validate a model for building and deploying container-based applications on AWS.
Which combination of steps should the developer take to deploy the containerized proof-of- concept application with the LEAST operational effort? (Choose two.)
Answer: D,E
NEW QUESTION # 626
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