Free Amazon DVA-C02 Exam Questions

Question 1

A developer is using an AWS CloudFormation template to create a pipeline in AWS CodePipeline. Thetemplate creates an Amazon S3 bucket that the pipeline references in a source stage. The template also createsan AWS CodeBuild project for a build stage. The pipeline sends notifications to an Amazon SNS topic. Logsfor the CodeBuild project are stored in Amazon CloudWatch Logs.The company needs to ensure that the pipeline's artifacts are encrypted with an existing customer-managedAWS KMS key. The developer has granted the pipeline permissions to use the KMS key.Which additional step will meet these requirements?

A : Create an Amazon S3 gateway endpoint that the pipeline can access.

B : In the CloudFormation template, use the KMS key to encrypt the logs in CloudWatch Logs.

C : Apply an S3 bucket policy that ensures the pipeline sends only encrypted objects to the S3 bucket.

D : Configure the notification topic to use the existing KMS key to enable encryption with the existing KMS key.

Answer: C

Question 2

A Development team has deployed several applications running on an Auto Scaling fleet of Amazon EC2 instances. The Operations team have asked for a display that shows a key performance metric for each application on a single screen for monitoring purposes.

What steps should a Developer take to deliver this capability using Amazon CloudWatch?

A : eate a custom event with a unique metric name for each application

B : eate a custom alarm with a unique metric name for each application

C : eate a custom namespace with a unique metric name for each application

D : eate a custom dimension with a unique metric name for each application

Answer: C

Question 3

A company is expanding the compatibility of its photo-snaring mobile app to hundreds of additional devices with unique screen dimensions and resolutions. Photos are stored in Amazon S3 in their original format and resolution. The company uses an Amazon CloudFront distribution to serve the photos The app includes the dimension and resolution of the display as GET parameters with every request. A developer needs to implement a solution that optimizes the photos that are served to each device to reduce load time and increase photo quality. Which solution will meet these requirements MOST cost-effective?

A : Use S3 Batch Operations to invoke an AWS Lambda function to create new variants of the photos with the required dimensions and resolutions. Create a dynamic CloudFront origin that automatically maps the request of each device to the corresponding photo variant.

B : Use S3 Batch Operations to invoke an AWS Lambda function to create new variants of the photos with the required dimensions and resolutions. Create a Lambda@Edge function to route requests to the corresponding photo variant by using request headers.

C : Create a Lambda@Edge function that optimizes the photos upon request and returns the photos as a response. Change the CloudFront TTL cache policy to the maximum value possible.

D : Create a Lambda@Edge function that optimizes the photos upon request and returns the photos as a response. In the same function, store a copy of the processed photos on Amazon S3 for subsequent requests.

Answer: D

Question 4

A mobile application has thousands of users. Each user may use multiple devices to access the application. The Developer wants to assign unique identifiers to these users regardless of the device they use.

Which of the below is the BEST method to obtain unique identifiers?

A : plement developer-authenticated identities by using Amazon Cognito and get credentials for these identities

B : eate a user table in Amazon DynamoDB with key-value pairs of users and their devices. Use these keys as unique identifiers

C : IAM-generated access key IDs for the users as the unique identifier, but do not store secret keys

D : ign IAM users and roles to the users. Use the unique IAM resource ID as the unique identifier

Answer: A

Question 5

An ecommerce startup is preparing for an annual sales event. As the traffic to the company's application increases, the development team wants to be notified when the Amazon EC2 instance's CPU utilization exceeds 80%. Which solution will meet this requirement?

A : Create a custom Amazon CloudWatch alarm that sends a notification to an Amazon SNS topic when the CPU utilization exceeds 80%.

B : Create a custom AWS CloudTrail alarm that sends a notification to an Amazon SNS topic when the CPU utilization exceeds 80%.

C : Create a cron job on the EC2 instance that invokes the --describe-instance-information command on the host instance every 15 minutes and sends the results to an Amazon SNS topic.

D : Create an AWS Lambda function that queries the AWS CloudTrail logs for the CPUUtilization metric every 15 minutes and sends a notification to an Amazon SNS topic when the CPU utilization exceeds 80%.

Answer: A