AWS-DA(371-380)

A developer is doing maintenance on an application hosted on AWS Elastic Beanstalk. The new version of the software is incompatible with the previous version. To properly deploy the update, a complete cutover to the new, updated version must be conducted on all instances simultaneously, with the option to roll back modifications in the event of a new version deployment failure. How can this be accomplished with the MINIMUM amount of downtime possible?

A. Use the Elastic Beanstalk All at once deployment policy to update all instances simultaneously.

B. Perform an Elastic Beanstalk Rolling with additional batch deployment.

C. Deploy the new version in a new Elastic Beanstalk environment and swap environment URLs

D. Perform an Elastic Beanstalk Rolling deployment.

It takes 40 seconds for an application to process instructions received through Amazon SQS message. Assuming the SQS queue is set with the default VisibilityTimeout value, what is the BEST approach to guarantee that no other instances may obtain a message that has already been handled or is still being processed after it is received?

A. Use the ChangeMessageVisibility API to increase the VisibilityTimeout, then use the DeleteMessage API to delete the message.

B. Use the DeleteMessage API call to delete the message from the queue, then call DeleteQueue API to remove the queue.

C. Use the ChangeMessageVisibility API to decrease the timeout value, then use the DeleteMessage API to delete the message.

D. Use the DeleteMessageVisibility API to cancel the VisibilityTimeout, then use the DeleteMessage API to delete the message.

A developer constructed a Lambda function for the backend of a web application. When the Lambda function is tested using the AWS Lambda interface, the developer can see that it is being performed, but no log data is created in Amazon CloudWatch Logs, even after several minutes. What may have resulted in this situation?

A. The Lambda function does not have any explicit log statements for the log data to send it to CloudWatch Logs.

B. The Lambda function is missing CloudWatch Logs as a source trigger to send log data.

C. The execution role for the Lambda function is missing permissions to write log data to the CloudWatch Logs.

D. The Lambda function is missing a target CloudWatch Log group.

An application will consume data at a rapid rate from a variety of sources and must store it in an Amazon S3 bucket. Which service would be the most effective in accomplishing this task?

A. Amazon Kinesis Firehose

B. Amazon S3 Acceleration Transfer

C. Amazon SQS

D. Amazon SNS

A business is building an application that will be accessible through the Amazon API Gateway's REST API. Only registered users should be able to access specific API resources. The token in use should expire automatically and should be updated on a regular basis. How can a developer adhere to these specifications?

A. Create an Amazon Cognito identity pool, configure the Amazon Cognito Authorizer in API Gateway, and use the temporary credentials generated by the identity pool.

B. Create and maintain a database record for each user with a corresponding token and use an AWS Lambda authorizer in API Gateway.

C. Create an Amazon Cognito user pool, configure the Cognito Authorizer in API Gateway, and use the identity or access token.

D. Create an IAM user for each API user, attach an invoke permissions policy to the API, and use an IAM authorizer in API Gateway.

A developer uses the AWS CLI to create a role in order to get a set of temporary security credentials. Which of the following environment variables or AWS configuration file must be specified in order to authenticate with AWS?

A. AccessKeyId SecretAccessKey, and AssumedRoleId

B. UserId, SessionToken, and AssumedRoleId

C. AccessKeyId, SecretAccessKey, and SessionToken

D. UserId, SessionToken and Credentials

Which approaches will aid in mitigating this circumstance? (Select two.)

A. Implement retries with exponential backoff

B. Use a PutRecord API instead of PutRecords

C. Reduce the frequency and/or size of the requests

D. Use Amazon SNS instead of Kinesis

E. Reduce the number of KCL consumers

A developer is developing a web application that makes use of Amazon API Gateway to expose an AWS Lambda function for the purpose of processing client requests. The developer detects that the API Gateway times out during testing, despite the fact that the Lambda function completes inside the specified time limit. Which of the following Amazon CloudWatch API Gateway metrics may assist the developer in troubleshooting the issue? (Select two.)

An on-premises e-commerce web application with shared session information is being transferred to AWS. The program must be fault resilient and inherently highly scalable, with any service interruptions having little impact on the user experience. What is the optimal method for storing session state?

A. Store the session state in Amazon ElastiCache

B. Store the session state in Amazon CloudFront

C. Store the session state in Amazon S3

D. Enable session stickiness using elastic load balancers

A business is maintaining an on-premises NoSQL database to host a vital component of an application that is experiencing scalability challenges. The organization wishes to move the application to Amazon DynamoDB, taking into account the following factors: ✑ Optimize frequent queries ✑ Reduce read latencies ✑ Plan for frequent queries on certain key attributes of the table Which method would assist in accomplishing these goals?

A. Create global secondary indexes on keys that are frequently queried. Add the necessary attributes into the indexes.

B. Create local secondary indexes on keys that are frequently queried. DynamoDB will fetch needed attributes from the table.

C. Create DynamoDB global tables to speed up query responses. Use a scan to fetch data from the table.

D. Create an AWS Auto Scaling policy for the DynamoDB table.