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NEW QUESTION 28
Which of the below mentioned commands allows the user to share the AMI with his peers using the AWS EC2 CLI?

  • A. ec2-modify-image-attribute
  • B. ec2-share-image-public
  • C. ec2-share-image-account
  • D. ec2-share-image

Answer: A

Explanation:
A user can share an AMI with another user / peer using the command:
ec2-modify-image-attribute AMI-ID -l -a AWS Account ID
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/sharingamis-explicit.html

NEW QUESTION 29
An e-commerce site allows returning users to log in to display customized web pages. The workflow is shown in the image below:

An application is running on EC2 instances. Amazon RDS is used for the database that stores user accounts and preferences. The website freezes or is slow to load while waiting for the login step to complete. The remaining components of the site are well-optimized.
Which of the following techniques will resolve this issue? (Select Two.)

  • A. Use Amazon Application Load Balancer to load balance the traffic to the website.
  • B. Use Amazon ElastiCache for MemCached to cache user data.
  • C. Implement the user login page as an asynchronous Lambda function.
  • D. Call the database asynchronously so the code can continue executing.
  • E. Batch login requests from hundreds of users together as a single read request to the database.

Answer: B,D

Explanation:
https://docs.aws.amazon.com/sdk-for-javascript/v2/developer-guide/making-asynchronous- calls.html

NEW QUESTION 30
A development team is designing a mobile app that requires multi-factor authentication.
Which steps should be taken to achieve this? (Choose two.)

  • A. Enable multi-factor authentication for the Amazon Cognito user pool.
  • B. Send multi-factor authentication text codes to users with the Amazon SNS Publish API call in the app code.
  • C. Enable multi-factor authentication for the users created in AWS IAM.
  • D. Use Amazon Cognito to create a user pool and create users in the user pool.
  • E. Use AWS IAM to create IAM users.

Answer: A,C

Explanation:
Explanation/Reference: https://docs.aws.amazon.com/cognito/latest/developerguide/user-pool-settings-mfa.html#:~:text=To
%20configure%20MFA%20in%20the,the%20risk%2Dbased%20adaptive%20authentication.
https://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_mfa_enable_virtual.html

NEW QUESTION 31
A company has three AWS Lambda functions that are written in Node js The Lambda functions include a mix of custom code and open-source modules When bugs are occasionally detected in the open-source modules, all three Lambda functions must be patched.
What is the MOST operationally efficient solution to deploy a patched open-source library for all three Lambda functions?

  • A. Create an Amazon CloudFront distribution with an Amazon S3 bucket as the origin Upload the patched modules to Amazon S3 when needed Modify each Lambda function to download the patched modules from the CloudFront distribution during the cold start.
  • B. Create a custom AWS CloudFormation public registry extension Reference a GitHub repository that hosts the open-source modules m the extension Configure Formation to scan the repository once each day Write an AWS Serverless Application Model (AWS SAM) template to redeploy the three Lambda functions upon a scan notification change.
  • C. Launch an Amazon EC2 instance Host a private open-source module registry on the EC2 instance Upload the modified open-source modules to the private registry when needed. Modify each Lambda function deployment script to download the modules from the private registry Redeploy the three new Lambda functions.
  • D. Create a Lambda layer with the open-source modules Modify all three Lambda functions to depend on the layer Remove the open-source modules from each Lambda function Patch the Lambda layer with the modified open-source modules when needed Update the Lambda functions to reference the new layer version

Answer: D

NEW QUESTION 32
An application under development is required to store hundreds of video files. The data must be encrypted within the application prior to storage, with a unique key for each video file.
How should the Developer code the application?

  • A. Use the KMS GenerateDataKey API to get a data key. Encrypt the data with the data key. Store the encrypted data key and data.
  • B. Use the KMS Encrypt API to encrypt the data. Store the encrypted data key and data.
  • C. Use a cryptography library to generate an encryption key for the application. Use the encryption key to encrypt the data. Store the encrypted data.
  • D. Upload the data to an S3 bucket using server side-encryption with an AWS KMS key.

Answer: A

Explanation:
Explanation
Refer AWS documentation - KMS GenerateDataKey
Returns a data encryption key that you can use in your application to encrypt data locally.
You must specify the customer master key (CMK) under which to generate the data key. You must also specify the length of the data key using either the field. You must specify one field or the other, but not both. For common key lengths (128-bit and 256-bit symmetric keys), we recommend that you use KeySpec. To perform this operation on a CMK in a different AWS account, specify the key ARN or alias ARN in the value of the KeyId parameter.
This operation returns a plaintext copy of the data key in the field of the response, and an encrypted copy of the data key in the CiphertextBlob encrypted under the CMK specified in the KeyId field of the request.

NEW QUESTION 33
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