Amazon DVA-C01 Online Practice Questions and Exam Preparation

Amazon DVA-C01 Online Questions & Answers

• Question 441:

  Which EC2 API call would you use to retrieve a list of Amazon Machine Images (AMIs)?

  A. DescnbeInstances

  B. DescribeAMls

  C. DescribeImages

  D. GetAMls

  E. You cannot retrieve a list of AMIs as there are over 10,000 AMIs

  Correct Answer: C

  https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeImages.html Describes the specified images (AMIs, AKIs, and ARIs) available to you or all of the images available to you.

• Question 442:

  A Developer has created a software package to be deployed on multiple EC2 instances using IAM roles.

  What actions could be performed to verify IAM access to get records from Amazon Kinesis Streams? (Select TWO.)

  A. Use the AWS CLI to retrieve the IAM group.

  B. Query Amazon EC2 metadata for in-line IAM policies.

  C. Request a token from AWS STS, and perform a describe action.

  D. Perform a get action using the ?dry-run argument.

  E. Validate the IAM role policy with the IAM policy simulator.

  Correct Answer: AE

• Question 443:

  An application stores payroll information nightly in DynamoDB for a large number of employees across hundreds of offices. Item attributes consist of individual name, office identifier, and cumulative daily hours. Managers run reports for ranges of names working in their office. One query is. "Return all Items in this office for names starting with A through E".

  Which table configuration will result in the lowest impact on provisioned throughput for this query?

  A. Configure the table to have a hash index on the name attribute, and a range index on the office identifier

  B. Configure the table to have a range index on the name attribute, and a hash index on the office identifier

  C. Configure a hash index on the name attribute and no range index

  D. Configure a hash index on the office Identifier attribute and no range index

  Correct Answer: B

  https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.CoreCompon ents.html Partition key and sort key ?Referred to as a composite primary key, this type of key is composed of two attributes. The first attribute is the partition key, and the second attribute is the sort key. DynamoDB uses the partition key value as input to an internal hash function. The output from the hash function determines the partition (physical storage internal to DynamoDB) in which the item will be stored. All items with the same partition key value are stored together, in sorted order by sort key value.

• Question 444:

  A Developer has an application that can upload tens of thousands of objects per second to Amazon S3 in parallel within a single AWS account. As part of new requirements, data stored in S3 must use server side encryption with AWS KMS (SSE-KMS). After creating this change, performance of the application is slower.

  Which of the following is MOST likely the cause of the application latency?

  A. Amazon S3 throttles the rate at which uploaded objects can be encrypted using Customer Master Keys.

  B. The AWS KMS API calls limit is less than needed to achieve the desired performance.

  C. The client encryption of the objects is using a poor algorithm.

  D. KMS requires that an alias be used to create an independent display name that can be mapped to a CMK.

  Correct Answer: B

  https://aws.amazon.com/about-aws/whats-new/2018/08/aws-key-management-service-increases-api-requests-per-second-limits/ KMS API access limit is 10k/sec in us-east and some others and 5.5k/sec for the rest of the regions. Client can request this limit to be changed.

• Question 445:

  A company has an internet-facing application that uses Web Identity Federation to obtain a temporary credential from AWS Security Token Service (AWS STS). The app then uses the token to access AWS services. Review the following response:

  

  Based on the response displayed what permissions are associated with the call from the application?

  A. Permissions associated with the role AROACLKWSDQRAOEXAMPLE:app1

  B. Permissions associated with the default role used when the AWS service was built

  C. Permission associated with the IAM principal that owns the AccessKeyID ASgeIAIOSFODNN7EXAMPLE

  D. Permissions associated with the account that owns the AWS service

  Correct Answer: C

• Question 446:

  A Developer needs to use AWS X-Ray to monitor an application that is deployed on EC2 instances. What steps have to be executed to perform the monitoring?

  A. Deploy the X-Ray SDK with the application and use X-Ray annotation.

  B. Install the X-Ray daemon and instrument the application code.

  C. Install the X-Ray daemon and configure it to forward data to Amazon CloudWatch Events.

  D. Deploy the X-Ray SDK with the application and instrument the application code.

  Correct Answer: C

• Question 447:

  A Developer has created a large Lambda function, and deployment is failing with the following error:

  ClientError: An error occurred (InvalidParameterValueException) when calling the CreateFunction operation: Unzipped size must be smaller than XXXXXXXXX bytes', where XXXXXXXXX is the current Lambda limit What can the Developer do to fix this problem?

  A. Submit a limit increase request to AWS Support to increase the function to the size needed.

  B. Use a compression algorithm that is more efficient than ZIP.

  C. Break the function into multiple smaller Lambda functions.

  D. ZIP the ZIP file twice to compress it further.

  Correct Answer: C

• Question 448:

  A company is using AWS CodePipeline to deliver one of its applications. The delivery pipeline is triggered by changes to the master branch of an AWS CodeCommit repository and uses AWS CodeBuild to implement the test and build stages

  of the process and AWS CodeDeploy to deploy the application.

  The pipeline has been operating successfully for several months and there have been no modifications. Following a recent change to the application's source code, AWS CodeDeploy has not deployed the updates application as expected.

  What are the possible causes? (Choose two.)

  A. The change was not made in the master branch of the AWS CodeCommit repository.

  B. One of the earlier stages in the pipeline failed and the pipeline has terminated.

  C. One of the Amazon EC2 instances in the company's AWS CodePipeline cluster is inactive.

  D. The AWS CodePipeline is incorrectly configured and is not executing AWS CodeDeploy.

  E. AWS CodePipeline does not have permissions to access AWS CodeCommit.

  Correct Answer: AB

• Question 449:

  EC2 instances are launched from Amazon Machine images (AMIs). A given public AMI can:

  A. be used to launch EC2 Instances in any AWS region.

  B. only be used to launch EC2 instances in the same country as the AMI is stored.

  C. only be used to launch EC2 instances in the same AWS region as the AMI is stored.

  D. only be used to launch EC2 instances in the same AWS availability zone as the AMI is stored

  Correct Answer: C

  https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/usingsharedamis-finding.html

• Question 450:

  A company wants to implement a continuous integration for its workloads on AWS. The company wants to trigger unit test in its pipeline for commits-on its code repository, and wants to be notified of failure events in the pipeline. How can these requirements be met?

  A. Store the source code in AWS CodeCommit. Create a CodePipeline to automate unit testing. Use Amazon SNS to trigger notifications of failure events.

  B. Store the source code in GitHub. Create a CodePipeline to automate unit testing. Use Amazon SES to trigger notifications of failure events.

  C. Store the source code on GitHub. Create a CodePipeline to automate unit testing. Use Amazon CloudWatch to trigger notifications of failure events.

  D. Store the source code in AWS CodeCommit. Create a CodePipeline to automate unit testing. Use Amazon CloudWatch to trigger notification of failure events.

  Correct Answer: D