Question 1

A developer is building a new containerized application by using AWS Copilot. The developer uses the AWS Copilot command line interface (CLI) to deploy the application during development. The developer committed the application code to a new AWS CodeCommit repository. The developer must create an automated deployment process before releasing the new application to production.

What should the developer do to meet these requirements in the MOST operationally efficient way?

Options :

A : Create a buildspec file that invokes the AWS Copilot CLI commands to build and deploy the application. Use the AWS Copilot CLI to create an AWS CodePipeline that uses the CodeCommit repository in the source stage and AWS CodeBuild in the build stage.

B : Use the AWS Serverless Application Model (AWS SAM) CLI to bootstrap and initialize an AWS CodePipeline configuration. Use the CodeCommit repository as the source. Invoke the AWS Copilot CLI to build and deploy the application.

C : Use the AWS Copilot CLI to define the AWS Copilot pipeline and to deploy the AWS CodePipeline. Select CodeCommit as the source for the AWS CodePipeline.

D : Define an AWS CloudFormation template for an AWS CodePipeline with CodeCommit as the source. Configure the template as an AWS Copilot CLI add-on. Use the AWS Copilot CLI to deploy the application.

Answer: C

Question 2

A company recently deployed a new serverless user portal. Users have reported that part of the portal is slow. The initial analysis found a single Amazon API Gateway endpoint that is responsible for the performance issues. The endpoint integrates with an AWS Lambda function. However, the Lambda function interacts with other APIs and AWS services.

How can a developer find the source of the increased response time by using operational best practices?

Options :

A : Update the Lambda function by adding logging statements with high-precision timestamps before and after each external request. Deploy the updated Lambda function. After accumulating enough usage data, examine the Amazon CloudWatch logs for the Lambda function to determine the likely sources for the increased response time.

B : Instrument the Lambda function with the AWS X-Ray SDK. Add HTTP and HTTPS interceptors and SDK client handlers. Deploy the updated Lambda function. Turn on X-Ray tracing. After accumulating enough usage data, use the X-Ray service map to examine the average response times to determine the likely sources.

C : Review the Lambda function-s Amazon CloudWatch metrics by using the metrics explorer. Apply anomaly detection to the Duration metric and the Throttles metric. Review the anomalies to determine the likely sources.

D : Use Amazon CloudWatch Synthetics to create a new canary. Turn on AWS X-Ray tracing on the canary. Configure the canary to scan the user portal. After accumulating enough usage data, use the CloudWatch Synthetics canary dashboard to view the metrics from the canary.

Answer: B

Question 3

A Developer is troubleshooting an issue with a DynamoDB table. The table is used to store order information for a busy online store and uses the order date as the partition key. During busy periods writes to the table are being throttled despite the consumed throughput being well below the provisioned throughput.

According to AWS best practices, how can the Developer resolve the issue at the LOWEST cost?

Options :

A : Use an Amazon SQS queue to buffer the incoming writes

B : Add a global secondary index to the table

C : Increase the read and write capacity units for the table

D : Add a random number suffix to the partition key values

Answer: D

Question 4

A developer is working on an application that is deployed on an Amazon EC2 instance. The developer needs a solution that will securely transfer files from the application to an Amazon S3 bucket.

What should the developer do to meet these requirements in the MOST secure way?

Options :

A : Create an IAM user. Create an access key for the IAM user. Store the access key in the application’s environment variables.

B : Create an IAM role. Create an access key for the IAM role. Store the access key in the application’s environment variables.

C : Create an IAM role. Configure the IAM role to access the specific Amazon S3 API calls the application requires. Associate the IAM role with the EC2 instance.

D : Configure an S3 bucket policy for the S3 bucket. Configure the S3 bucket policy to allow access for the EC2 instance ID.

Answer: B

Question 5

A popular mobile app retrieves data from an AWS DynamoDB table that was provisioned with read-capacity units (RCU’s) that are evenly shared across four partitions. One of those partitions is receiving more traffic than the other partitions, causing hot partition issues.

What technology will allow you to reduce the read traffic on your AWS DynamoDB table with minimal effort?

Options :

A : ElastiCache

B : DynamoDB DAX

C : More partitions

D : DynamoDB Streams

Answer: B

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