A developer has a legacy application that is hosted on-premises Other applications hosted on AWS depend on the on-premises application for proper functioning In case of any application errors, the developer wants to be able to use Amazon CloudWatch to monitor and troubleshoot all applications from one place.
How can the developer accomplish this?
A. Install an AWS SDK on the on-premises server to automatically send logs to CloudWatch .
B. Download the CloudWatch agent to the on-premises server Configure the agent to use IAM user credentials with permissions for CloudWatch
C. Upload log files from the on-premises server to Amazon S3 and have CloudWatch read the files
D. Upload log files from the on-premises server to an Amazon EC2 instance and have the instance forward the logs to CloudWatch.
A developer wants the ability to roll back to a previous version of an AWS Lambda function in the event of errors caused by a new deployment.
How can the developer achieve this with MINIMAL impact on users?
A. Change the application to use an alias that points to the current version Deploy the new version of the code Update the alias to use the newly deployed version If too many errors are encountered, point the alias back to the previous version
B. Change the application to use an alias that points to the current version Deploy the new version of the code. Update the alias to direct 10% of users to the newly deployed version. If too many errors are encountered, send 100% of traffic to the previous version
C. Do not make any changes to the application Deploy the new version of the code. If too many errors are encountered, point the application back to the previous version using the version number in the Amazon Resource Name (ARN)
D. Create three aliases: new, existing, and router Point the existing alias to the current version Have the router alias direct 100% of users to the existing alias Update the application to use the router alias Deploy the new version of the code Point the new alias to this version Update the router alias to direct 10% of users to the new alias If too many errors are encountered, send 100% of traffic to the existing alias
A developer wants to build an application that will allow new users to register and create new user accounts. The application must also allow users with social media accounts to log in using their social media credentials.
Which AWS service or feature can be used to meet these requirements'?
A. AWS IAM
B. Amazon Cognito identity pools
C. Amazon Cognito user pools
D. AWS Directory Service
A software engineer developed an AWS Lambda function in Node.js to do some CPU-intensive data processing. With the default settings, the Lambda function takes about 5 minutes to complete.
Which approach should a developer take to increase the speed of completion''
A. Instead of using Node js. rewrite the Lambda function using Python
B. Instead of packaging the libraries in the ZIP file with the function move them to a Lambda layer and use the layer with the function.
C. Allocate the maximum available CPU units lo the function
D. Increase the available memory to the function.
A company wants to migrate an imaging service to Amazon EC2 while following security best practices. The images are sourced and read from a non-public Amazon S3 bucket What should a developer do to meet these requirements?
A. Create an IAM user with read-only permissions for the S3 bucket Temporarily store the user credentials in the Amazon EBS volume of the EC2 instance
B. Create an IAM user with read-only permissions for the S3 bucket. Temporarily store the user credentials in the user data of the EC2 instance.
C. Create an EC2 service role with read-only permissions for the S3 bucket Attach the role to the EC2 instance
D. Create an S3 service role with read-only permissions for the S3 bucket Attach the role to the EC2 instance
A company is developing a web application that allows its employees to upload a profile picture to a private Amazon S3 bucket There is no size limit for the profile pictures, which should be displayed every time an employee logs in. For security reasons, the pictures cannot be publicly accessible.
What is a viable long-term solution for this scenario''
A. Generate a presigned URL when a picture is uploaded Save the URL in an Amazon DynamoDB table Return the URL to the browser when the employee logs in
B. Save the picture's S3 key in an Amazon DynamoDB table Create an Amazon S3 VPC endpoint to allow the employees to download pictures once they log in.
C. Encode a picture using base64 Save the base64 string in an Amazon DynamoDB table Allow the browser to retrieve the string and convert it to a picture
D. Save the picture's S3 key in an Amazon DynamoDB table. Use a function to generate a presigned URL every time an employee logs in. Return the URL to the browser.
An application ingests a large number of small messages and stores them in a database. The application uses AWS Lambd A development team is making changes to the application's processing logic. In testing, it is taking more than 15 minutes to process each message. The team is concerned the current backend may time out.
Which changes should be made to the backend system to ensure each message is processed in the MOST scalable way?
A. Add the messages to an Amazon SQS queue Set up an Amazon EC2 instance to poll the queue and process messages as they arrive.
B. Add the messages to an Amazon SQS queue. Set up Amazon EC2 instances in an Auto Scaling group to poll the queue and process the messages as they arrive.
C. Create a support ticket to increase the Lambda timeout to 60 minutes to allow for increased processing time
D. Change the application to directly insert the body of the message into an Amazon RDS database.
A developer has built an application running on AWS Lambda using AWS Serverless Application Model (AWS SAM). What is the correct order of execution to successfully deploy the application''
A. 1. Build the SAM template in Amazon EC2
2.
Package the SAM template to Amazon EBS storage
3.
Deploy the SAM template from Amazon EBS.
B. 1. Build the SAM template locally
2.
Package the SAM template onto Amazon S3
3.
Deploy the SAM template from Amazon S3.
C. 1. Build the SAM template locally
2.
Deploy the SAM template from Amazon S3.
3.
Package the SAM template for use
D. 1. Build the SAM template locally
2.
Package the SAM template from AWS CodeCommit.
3.
Deploy the SAM template to CodeCommit
A development team wants to immediately build and deploy an application whenever there is a change to the source code.
Which approaches could be used to trigger the deployment? (Select TWO.)
A. Store the source code in an Amazon S3 bucket Configure AWS CodePipeline to start whenever a file in the bucket changes
B. Store the source code in an encrypted Amazon EBS volume Configure AWS CodePipeline to start whenever a file in the volume changes
C. Store the source code in an AWS CodeCommit repository Configure AWS CodePipeline to start whenever a change is committed to the repository.
D. Store the source code in an Amazon S3 bucket Configure AWS CodePipeline to start every 15 minutes
E. Store the source code in an Amazon EC2 instance's ephemeral storage. Configure the instance to start AWS CodePipeline whenever there are changes to the source code
A company has a REST application comprised of an Amazon API Gateway and several AWS Lambda functions. A developer is responding to an alert that the API Gateway's HTTP response error rate has unexpectedly increased. The developer must determine must which Lambda function is malfunctioning.
Which method would help the developer make this determination while minimizing delays?
A. Execute an Amazon Athena query against the API Gateway and Lambda execution logs.
B. Execute an Amazon CloudWatch Logs Insights query against the API Gateway and Lambda execution logs.
C. Download the API Gateway and Lambda execution logs from Amazon S3, and perform a line-by-line search against them.
D. Download the API Gateway and Lambda execution logs from Amazon CloudWatch Events, and perform line-by-line search against them.
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