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Amazon AWS Certified Developer - Associate Sample Questions (Q122-Q127):

NEW QUESTION # 122
A developer is troubleshooting an application that uses Amazon DynamoDB in the us-west-2 Region. The application is deployed to an Amazon EC2 instance. The application requires read- only permissions to a table that is named Cars. The EC2 instance has an attached IAM role that contains the following IAM policy:

When the application tries to read from the Cars table, an Access Denied error occurs.
How can the developer resolve this error?

A. Create a trust policy that specifies the EC2 service principal. Associate the role with the policy.
B. Create a trust relationship between the role and dynamodb.amazonaws.com.
C. Modify the IAM policy resource to be "arn:aws:dynamodb:us-west-2:account-id:table/*"
D. Modify the IAM policy to include the dynamodb:* action.

Answer: A

Explanation:
https://aws.amazon.com/blogs/security/how-to-use-trust-policies-with-iam-roles/

NEW QUESTION # 123
A company is creating an application that processes .csv files from Amazon S3. A developer has created an S3 bucket. The developer has also created an AWS Lambda function to process the .csv files from the S3 bucket.
Which combination of steps will invoke the Lambda function when a .csv file is uploaded to Amazon S3? (Choose two.)

A. Schedule an Amazon EventBridge rule to run a new Lambda function to scan the S3 bucket.
B. Add a trigger to the existing Lambda function. Set the trigger type to EventBridge. Select the Amazon EventBridge rule.
C. Create a new Lambda function to scan the S3 bucket for recently added S3 objects.
D. Add S3 Lifecycle rules to invoke the existing Lambda function.
E. Create an Amazon EventBridge rule. Configure the rule with a pattern to match the S3 object created event.

Answer: B,E

Explanation:
Option A is correct because an Amazon EventBridge rule can be created to detect when an object is created in an S3 bucket. The rule should be configured with a pattern to match the S3 object created event.
Option C is correct because the existing Lambda function can be updated with an EventBridge trigger. The trigger type should be set to EventBridge, and the Amazon EventBridge rule created in step A should be selected.

NEW QUESTION # 124
A company has a web application that runs on Amazon EC2 instances with a custom Amazon Machine Image (AMI) The company uses AWS CloudFormation to provision the application The application runs in the us- east-1 Region, and the company needs to deploy the application to the us-west-1 Region An attempt to create the AWS CloudFormation stack in us-west-1 fails. An error message states that the AMI ID does not exist. A developer must resolve this error with a solution that uses the least amount of operational overhead Which solution meets these requirements?

A. Change the AWS CloudFormation templates for us-east-1 and us-west-1 to use an AWS AMI.
Relaunch the stack for both Regions.
B. Copy the custom AMI from us-east-1 to us-west-1. Update the AWS CloudFormation template for us- west-1 to refer to AMI ID for the copied AMI Relaunch the stack
C. Build the custom AMI in us-west-1 Create a new AWS CloudFormation template to launch the stack in us-west-1 with the new AMI ID
D. Manually deploy the application outside AWS CloudFormation in us-west-1.

Answer: B

Explanation:
* Problem:CloudFormation can't find the custom AMI in the target region (us-west-1) because AMIs are region-specific.
* Copying AMIs:
* AMIs can be copied across regions, maintaining their configuration.
* This approach minimizes operational overhead as the existing CloudFormation template can be reused with a minor update.
* Updating the Template:
* Modify the CloudFormation template in us-west-1 to reference the newly copied AMI's ID in that region.

NEW QUESTION # 125
A developer is testing a RESTful application that is deployed by using Amazon API Gateway and AWS Lambda. When the developer tests the user login by using credentials that are not valid, the developer receives an HTTP 405: METHOD_NOT_ALLOWED error. The developer has verified that the test is sending the correct request for the resource.
Which HTTP error should the application return in response to the request?

A. HTTP 401
B. HTTP 404
C. HTTP 503
D. HTTP 505

Answer: A

Explanation:
https://docs.aws.amazon.com/AmazonS3/latest/API/ErrorResponses.html

NEW QUESTION # 126
An application is using Amazon Cognito user pools and identity pools for secure access. A developer wants to integrate the user-specific file upload and download features in the application with Amazon S3. The developer must ensure that the files are saved and retrieved in a secure manner and that users can access only their own files. The file sizes range from 3 KB to 300 MB.
Which option will meet these requirements with the HIGHEST level of security?

A. Use an IAM policy within the Amazon Cognito identity prefix to restrict users to use their own folders in Amazon S3.
B. Use S3 Event Notifications to validate the file upload and download requests and update the user interface (UI).
C. Save the details of the uploaded files in a separate Amazon DynamoDB table. Filter the list of files in the user interface (UI) by comparing the current user ID with the user ID associated with the file in the table.
D. Use Amazon API Gateway and an AWS Lambda function to upload and download files. Validate each request in the Lambda function before performing the requested operation.

Answer: A

Explanation:
https://docs.aws.amazon.com/cognito/latest/developerguide/amazon-cognito-integrating-user-pools-with-identity-pools.html

NEW QUESTION # 127
......

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