Amazon DVA-C01 Practice Test - Questions Answers, Page 9
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A company is migrating its on-premises database to Amazon RDS for MySQL. The company has readheavy workloads, and wants to make sure it re-factors its code to achieve optimum read performance for its queries. How can this objective be met?
A Developer is receiving HTTP 400: ThrottlingException errors intermittently when calling theAmazonCloudWatch API. When a call fails, no data is retrieved. What best practice should first be applied to address this issue?
A Developer is testing a Docker-based application that uses the AWS SDK to interact with Amazon DynamoDB. In the local development environment, the application has used IAM access keys. The application is now ready for deployment onto an ECS cluster.
How should the application authenticate with AWS services in production?
A Developer created a Lambda function for a web application backend. When testing the Lambda function from the AWS Lambda console, the Developer can see that the function is being executed, but there is no log data being generated in Amazon CloudWatch Logs, even after several minutes.
What could cause this situation?
An application has hundreds 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 following methods should be used to obtain unique identifiers?
An application is designed to use Amazon SQS to manage messages from many independent senders. Each sender’s messages must be processed in the order they are received. Which SQS feature should be implemented by the Developer?
A deployment package uses the AWS CLI to copy files into any S3 bucket in the account, using access keys stored in environment variables. The package is running on EC2 instances, and the instances have been modified to run with an assumed IAM role and a more restrictive policy that allows access to only one bucket.
After the change, the Developer logs into the host and still has the ability to write into all of the S3 buckets in that account. What is the MOST likely cause of this situation?
A Developer is writing transactions into a DynamoDB table called “SystemUpdates” that has 5 write capacity units. Which option has the highest read throughput?
Where should an Elastic Beanstalk configuration file named healthcheckur1.config be placed in the application source bundle?
During non-peak hours, a Developer wants to minimize the execution time of a full Amazon DynamoDB table scan without affecting normal workloads. The workloads average half of the strongly consistent read capacity units during non-peak hours.
How would the Developer optimize this scan?
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