Amazon DVA-C01 Online Practice Questions and Exam Preparation

Amazon DVA-C01 Online Questions & Answers

• Question 471:

  A Developer is trying to make API calls using SDK. The IAM user credentials used by the application require multi-factor authentication for all API calls.

  Which method the Developer use to access the multi-factor authentication protected API?

  A. GetFederationToken

  B. GetCallerIdentity

  C. GetSessionToken

  D. DecodeAutherizationMessage

  Correct Answer: C

• Question 472:

  Which of the following statements about SWF are true? Choose 3 answers

  A. SWF tasks are assigned once and never duplicated

  B. SWF requires an S3 bucket for workflow storage

  C. SWF workflow executions can last up to a year

  D. SWF triggers SNS notifications on task assignment

  E. SWF uses deciders and workers to complete tasks

  F. SWF requires at least 1 EC2 instance per domain

  Correct Answer: ACE

• Question 473:

  An AWS Lambda function must access an external site by using a regularly rotated user name and password. These items must be kept securely and cannot be stored in the function code.

  What combination of AWS services can be used to accomplish this? (Choose two.)

  A. AWS Certificate Manager (ACM)

  B. AWS Systems Manager Parameter Store

  C. AWS Trusted Advisor

  D. AWS KMS

  E. Amazon GuardDuty

  Correct Answer: BD

  https://docs.aws.amazon.com/kms/latest/developerguide/services-parameter-store.html

• Question 474:

  A Developer has setup an Amazon Kinesis Stream with 4 shards to ingest a maximum of 2500 records per second. A Lambda function has been configured to process these records. In which order will these records be processed?

  A. Lambda will receive each record in the reverse order it was placed into the stream following a LIFO (last-in, first-out) method

  B. Lambda will receive each record in the exact order it was placed into the stream following a FIFO (first-in, first-out) method.

  C. Lambda will receive each record in the exact order it was placed into the shard following a FIFO (first-in, first-out) method. There is no guarantee of order across shards.

  D. The Developer can select FIFO, (first-in, first-out), LIFO (last-in, last-out), random, or request specific record using the getRecords API.

  Correct Answer: C

• Question 475:

  Which of the following programming languages have an officially supported AWS SDK? Choose 2 answers

  A. Perl

  B. PHP

  C. Pascal

  D. Java

  E. SQL

  Correct Answer: BD

• Question 476:

  A Developer has published an update to an application that is served to a global user base using Amazon CloudFront. After deploying the application, users are not able to see the updated changes. How can the Developer resolve this issue?

  A. Remove the origin from the CloudFront configuration and add it again.

  B. Disable forwarding of query strings and request headers from the CloudFront distribution configuration.

  C. Invalidate all the application objects from the edge caches.

  D. Disable the CloudFront distribution and enable it again to update all the edge locations.

  Correct Answer: C

  https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/Invalidation.html

• Question 477:

  An application runs on multiple EC2 instances behind an ELB.

  Where is the session data best written so that it can be served reliably across multiple requests?

  A. Write data to Amazon ElastiCache

  B. Write data to Amazon Elastic Block Store.

  C. Write data to Amazon EC2 Instance Store.

  D. Write data to the root filesystem.

  Correct Answer: C

  Reference:

  https://docs.aws.amazon.com/aws-technical-content/latest/microservices-on-aws/microservices- on-aws.pdf?icmpid=link_from_whitepapers_page (14)

• Question 478:

  A company wants to containerize an existing three-tier web application and deploy it to Amazon ECS Fargate. The application is using session data to keep track of user activities. Which approach would provide the BEST user experience?

  A. Provision a Redic cluster in Amazon ElasticCache and save the session data in the cluster

  B. Create a session table in Amazon Redshift and save the session data in the database table.

  C. Enable session stickness in the existing Network Load Balancer and manage the session data in the container.

  D. Use an Amazon S3 bucket as data store and save the session data in the bucket.

  Correct Answer: C

• Question 479:

  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. Configure an ECS task IAM role for the application to use

  B. Refactor the application to call AWS STS AssumeRole based on an instance role

  C. Configure AWS access key/secret access key environment variables with new credentials

  D. Configure the credentials file with a new access key/secret access key

  Correct Answer: A

  https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task_IAM_role.html#:~:targetText=Amazon%20ECS%20Task%20Role,Task%20Role%20trust%20relationship%20policy.

• Question 480:

  A static website is hosted in an Amazon S3 bucket. Several HTML pages on the site use JavaScript to download images from another Amazon S3 bucket. These images are not displayed when users browse the site. What is the possible cause for the issue?

  A. The referenced Amazon S3 bucket is in another region.

  B. The images must be stored in the same Amazon S3 bucket.

  C. Port 80 must be opened on the security group in which the Amazon S3 bucket is located.

  D. Cross Origin Resource Sharing must be enabled on the Amazon S3 bucket.

  Correct Answer: D