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USE Amazon DVA-C02 QUESTIONS TO SPEED UP EXAM PREPARATION [2025]

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Amazon AWS Certified Developer - Associate Sample Questions (Q80-Q85):

NEW QUESTION # 80
A company has an application that is based on Amazon EC2. The company provides API access to the application through Amazon API Gateway and uses Amazon DynamoDB to store the application's data. A developer is investigating performance issues that are affecting the application. During peak usage, the application is overwhelmed by a large number of identical data read requests that come through APIs. What is the MOST operationally efficient way for the developer to improve the application's performance?

A. Enable API Gateway caching to cache API responses.
B. Use Amazon ElastiCache to cache application responses.
C. Configure Amazon EC2 Auto Scaling policies to meet fluctuating demand.
D. Use DynamoDB Accelerator (DAX) to cache database responses.

Answer: D

Explanation:
DynamoDB Accelerator (DAX) provides a managed caching layer specifically optimized for DynamoDB, reducing latency for repeated read requests.
* Why Option A is Correct:
* Purpose-Built: DAX is designed for DynamoDB, enabling sub-millisecond response times for frequently accessed items.
* Operational Efficiency: No need for additional application-level caching logic.
* Why Not Other Options:
* Option B: Auto Scaling increases capacity but does not address repetitive reads.
* Option C: API Gateway caching helps reduce request processing time but does not optimize DynamoDB reads.
* Option D: ElastiCache is a general-purpose cache, adding unnecessary complexity for DynamoDB use cases.
References:
* DynamoDB Accelerator (DAX)

NEW QUESTION # 81
A developer is updating an Amazon API Gateway REST API to have a mock endpoint. The developer wants to update the integration request mapping template so the endpoint will respond to mock integration requests with specific HTTP status codes based on various conditions.
Which statement will meet these requirements?

Answer: C

NEW QUESTION # 82
A company has an Amazon S3 bucket that contains sensitive data. The data must be encrypted in transit and at rest. The company encrypts the data in the S3 bucket by using an AWS Key Management Service (AWS KMS) key. A developer needs to grant several other AWS accounts the permission to use the S3 GetObject operation to retrieve the data from the S3 bucket.
How can the developer enforce that all requests to retrieve the data provide encryption in transit?

A. Define a resource-based policy on the KMS key to deny access when a request meets the condition of "aws:SecureTransport": "false".
B. Define a resource-based policy on the S3 bucket to deny access when a request meets the condition "aws:SecureTransport": "false".
C. Define a resource-based policy on the S3 bucket to allow access when a request meets the condition "aws:SecureTransport": "false".
D. Define a role-based policy on the other accounts' roles to deny access when a request meets the condition of "aws:SecureTransport": "false".

Answer: B

Explanation:
Amazon S3 supports resource-based policies, which are JSON documents that specify the permissions for accessing S3 resources. A resource-based policy can be used to enforce encryption in transit by denying access to requests that do not use HTTPS. The condition key aws:SecureTransport can be used to check if the request was sent using SSL. If the value of this key is false, the request is denied; otherwise, the request is allowed. Reference: How do I use an S3 bucket policy to require requests to use Secure Socket Layer (SSL)?

NEW QUESTION # 83
A company launched an online portal to announce a new product that the company will release in 6 months. The portal requests that users enter an email address to receive communications about the product. The company needs to create a REST API that will store the email addresses in Amazon DynamoDB.
A developer has created an AWS Lambda function that can store the email addresses. The developer will deploy the Lambda function by using the AWS Serverless Application Model (AWS SAM). The developer must provide access to the Lambda function over HTTP.
Which solutions will meet these requirements with the LEAST additional configuration? (Select TWO.)

A. Expose the Lambda function by using a Gateway Load Balancer.
B. Expose the Lambda function by using function URLs.
C. Expose the Lambda function by using AWS Global Accelerator
D. Expose the Lambda function by using Amazon API Gateway.
E. Expose the Lambda function by using a Network Load Balancer.

Answer: B,D

NEW QUESTION # 84
A company needs to deploy all its cloud resources by using AWS CloudFormation templates A developer must create an Amazon Simple Notification Service (Amazon SNS) automatic notification to help enforce this rule. The developer creates an SNS topic and subscribes the email address of the company's security team to the SNS topic.
The security team must receive a notification immediately if an 1AM role is created without the use of CloudFormation.
Which solution will meet this requirement?

A. Launch an Amazon EC2 instance that includes a script to filter events from CloudTrail if a role was created without CloudFormation. Configure the script to publish to the SNS topic. Create a cron job to run the script on the EC2 instance every 15 minutes.
B. Create an Amazon EventBridge rule to filter events from CloudTrail if a role was created without CloudFormation Specify the SNS topic as the target of the EventBridge rule.
C. Create an AWS Lambda function to filter events from CloudTrail if a role was created without CloudFormation Configure the Lambda function to publish to the SNS topic. Create an Amazon EventBridge schedule to invoke the Lambda function every 15 minutes
D. Create an AWS Fargate task in Amazon Elastic Container Service (Amazon ECS) to filter events from CloudTrail if a role was created without CloudFormation Configure the Fargate task to publish to the SNS topic Create an Amazon EventBridge schedule to run the Fargate task every 15 minutes

Answer: B

Explanation:
EventBridge (formerly CloudWatch Events) is the ideal service for real-time event monitoring.
CloudTrail logs IAM role creation.
EventBridge rules can filter CloudTrail events and trigger SNS notifications instantly.

NEW QUESTION # 85
......

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