An advertising company has a dynamic website with heavy traffic. The company wants to migrate the website infrastructure to AWS to handle everything except website development.
Which solution BEST meets these requirements?

A. Use AWS VM Import to migrate a web server image to AWS. Launch the image on a compute-optimized Amazon EC2 instance.
B. Launch multiple Amazon Lightsail instances behind a load balancer. Set up the website on those instances.
C. Deploy the website code in an AWS Elastic Beanstalk environment. Use Auto Scaling to scale the numbers of instances.
D. Use Amazon S3 to host the website. Use Amazon CloudFront to deliver the content at scale.

An application ingests a large number of small messages and stores them in a database. The application uses AWS Lambda. 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 and 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 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 is writing an application that will run on Amazon EC2 instances in an Auto Scaling group. The Developer wants to externalize session state to support the application.
Which services will meet these needs? (Choose two.)

A. Amazon DynamoDB
B. Amazon Cognito
C. Amazon ElastiCache
D. Amazon EBS
E. Amazon SQS

An online retail company has deployed a serverless application with AWS Lambda, Amazon API Gateway, Amazon S3, and Amazon DynamoDB using AWS CloudFormation. The company rolled out a new release with major upgrades to the Lambda function and deployed the release to production. Subsequently, the application stopped working.
Which solution should bring the application back up as quickly as possible?

A. Redeploy the application on Amazon EC2 so the Lambda function can resolve dependencies
B. Migrate DynamoDB to Amazon RDS and redeploy the Lambda function
C. Roll back the Lambda function to the previous version
D. Deploy the latest Lambda function in a different Region

A company’s ecommerce website is experiencing massive traffic spikes, which are causing performance problems in the
company database. Users are reporting that accessing the website takes a long time.
A Developer wants to implement a caching layer using Amazon ElastiCache. The website is required to be responsive no matter which product a user views, and the updates to product information and prices must be strongly consistent.
Which cache writing policy will satisfy these requirements?

A. Write to the cache directly and sync the backend at a later time
B. Write to the backend first and wait for the cache to expire
C. Write to the cache and the backend at the same time
D. Write to the backend first and invalidate the cache

A Developer is working on a serverless project based in Java. Initial testing shows a cold start takes about 8 seconds on average for AWS Lambda functions.
What should the Developer do to reduce the cold start time? (Choose two.)

A. Add the Spring Framework to the project and enable dependency injection.
B. Reduce the deployment package by including only needed modules from the AWS SDK for Java.
C. Increase the memory allocation setting for the Lambda function.
D. Increase the timeout setting for the Lambda function.
E. Change the Lambda invocation mode from synchronous to asynchronous.

A company is developing an application that will be accessed through the Amazon API Gateway REST API. Registered users should be the only ones who can access certain resources of this API. The token being used should expire automatically and needs to be refreshed periodically.
How can a Developer meet these requirements?

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 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 company has a web application that uses an Amazon Cognito user pool for authentication. The company wants to create a login page with the company logo.
What should a Developer do to meet these requirements?

A. Create a hosted user interface in Amazon Cognito and customize it with the company logo.
B. Create a login page with the company logo and upload it to Amazon Cognito.
C. Create a login page in Amazon API Gateway with the logo and save the link in Amazon Cognito.
D. Upload the logo to the Amazon Cognito app settings and point to the logo on a custom login page.