An IoT company has rolled out a fleet of sensors for monitoring temperatures in remote locations. Each device connects to AWS IoT Core and sends a message 30 seconds, updating an Amazon DynamoDB table. A System Administrator users AWS IoT to verify the devices are still sending messages to AWS IoT Core: the database is not updating.
What should a Solutions Architect check to determine why the database is not being updated?

A. Verify the AWS IoT Device Shadow service is subscribed to the appropriate topic and is executing the AWS Lambda function.
B. Verify that AWS IoT monitoring shows that the appropriate AWS IoT rules are being executed, and that the AWS IoT rules are enabled with the correct rule actions.
C. Check the AWS IoT Fleet indexing service and verify that the thing group has the appropriate IAM role to update DynamoDB.
D. Verify that AWS IoT things are using MQTT instead of MQTT over WebSocket, then check that the provisioning has the appropriate policy attached.

A company is using AWS CloudFormation as its deployment tool for all application. It stages all application binaries and templates within Amazon S3 bucket with versioning enabled. Developers have access to an Amazon EC2 instance that hosts the integrated development (IDE). The Developers download the application binaries from Amazon S3 to the EC2 instance, make changes, and upload the binaries to an S3 bucket after running the unit tests locally. The developers want to improve the existing deployment mechanism and implement CI/CD using AWS CodePipeline.
The developers have the following requirements:

• Use AWS CodeCommit for source control.
• Automate unit testing and security scanning.
• Alert the Developers when unit tests fail.
• Turn application features on and off, and customize deployment dynamically as part of CI/CD.
• Have the lead Developer provide approval before deploying an application.

Which solution will meet these requirements?

A. Use AWS CodeBuild to run tests and security scans. Use an Amazon EventBridge rule to send Amazon SNS alerts to the Developers when unit tests fail. Write AWS Cloud Developer kit (AWS CDK) constructs for different solution features, and use a manifest file to turn features on and off in the AWS CDK application. Use a manual approval stage in the pipeline to allow the lead Developer to approve applications.
B. Use AWS Lambda to run unit tests and security scans. Use Lambda in a subsequent stage in the pipeline to send Amazon SNS alerts to the developers when unit tests fail. Write AWS Amplify plugins for different solution features and utilize user prompts to turn features on and off. Use Amazon SES in the pipeline to allow the lead developer to approve applications.
C. Use Jenkins to run unit tests and security scans. Use an Amazon EventBridge rule in the pipeline to send Amazon SES alerts to the developers when unit tests fail. Use AWS CloudFormation nested stacks for different solution features and parameters to turn features on and off. Use AWS Lambda in the pipeline to allow the lead developer to approve applications.
D. Use AWS CodeDeploy to run unit tests and security scans. Use an Amazon CloudWatch alarm in the pipeline to send Amazon SNS alerts to the developers when unit tests fail. Use Docker images for different solution features and the AWS CLI to turn features on and off. Use a manual approval stage in the pipeline to allow the lead developer to approve
applications.

A retail company processes point-of-sale data on application servers in its data center and writes outputs to an Amazon DynamoDB table. The data center is connected to the company’s VPC with an AWS Direct Connect (DX) connection, and the application servers require a consistent network connection at speeds greater than 2 Gbps.
The company decides that the DynamoDB table needs to be highly available and fault tolerant. The company policy states that the data should be available across two regions.
What changes should the company make to meet these requirements?

A. Establish a second DX connection for redundancy. Use DynamoDB global tables to replicate data to a second Region. Modify the application to fail over to the second Region.
B. Use an AWS managed VPN as a backup to DX. Create an identical DynamoDB table in a second Region. Modify the application to replicate data to both Regions.
C. Establish a second DX connection for redundancy. Create an identical DynamoDB table in a second Region. Enable DynamoDB auto scaling to manage throughput capacity. Modify the application to write to the second Region.
D. Use AWS managed VPN as a backup to DX. Create an identical DynamoDB table in a second Region. Enable DynamoDB streams to capture changes to the table. Use AWS Lambda to replicate changes to the second Region.

A company has a web application that allows users to upload short videos. The videos are stored on Amazon EBS volumes and analyzed by custom recognition software for categorization.
The website contains static content that has variable traffic with peaks in certain months. The architecture consists of Amazon EC2 instances running in an Auto Scaling group for the web application and EC2 instances running in an Auto Scaling group to process an Amazon SQS-queue. The company wants to re-architect the application to reduce operational overhead using AWS managed services where possible and remove dependencies on third-party software.
Which solution meets these requirements?

A. Use Amazon ECS containers for the web application and Spot instances for the Scaling group that processes the SQS queue. Replace the custom software with Amazon Rekognition to categorize the videos.
B. Store the uploaded videos in Amazon EFS and mount the file system to the EC2 instances for the web application. Process the SQS queue with an AWS Lambda function that calls the Amazon Rekognition API to categorize the videos.
C. Host the web application in Amazon S3. Store the uploaded videos in Amazon S3. Use S3 event notification to publish events to the SQS queue. Process the SQS queue with an AWS Lambda function that call the Amazon Rekognition API to categorize the videos.
D. Use AWS Elastic Beanstalk to launch EC2 instances in an Auto Scaling group for the application and launch a worker environment to process the SQS queue. Replace the custom software with Amazon Rekognition to categorize the videos.

A company has a photo sharing social networking application. To provide a consistent experience for users, the company performs some image processing on the photos uploaded by users before publishing on the application. The image processing is implemented using a set of Python libraries.
The current architecture is as follows:

• The image processing Python code runs in a single Amazon EC2 instance and stores the processed images in an Amazon S3 bucket named ImageBucket.
• The front-end application, hosted in another bucket, loads the images from ImageBucket to display to users.

With plans for global expansion, the company wants to implement changes in its existing architecture to be able to scale for increased demand on the application and reduce management complexity as the application scales.
Which combination of changes should a solutions architect make? (Choose two.)

A. Place the image processing EC2 instance into an Auto Scaling group.
B. Use AWS Lambda to run the image processing tasks.
C. Use Amazon Rekognition for image processing.
D. Use Amazon CloudFront in front of ImageBucket.
E. Deploy the applications in an Amazon ECS cluster and apply Service Auto Scaling.

A company has a VPC with two domain controllers running Active Directory in the default configuration. The VPC DHCP options set is configured to use the IP addresses of the two domain controllers. There is a VPC interface endpoint defined; but instances within the VPC are not able to resolve the private endpoint addresses.
Which strategies would resolve this issue? (Choose two.)

A. Define an outbound Amazon Route 53 Resolver. Set a conditional forward rule for the Active Directory domain to the Active Directory servers. Update the VPC DHCP options set to AmazonProvidedDNS.
B. Update the DNS service on the Active Directory servers to forward all non-authoritative queries to the VPC Resolver.
C. Define an inbound Amazon Route 53 Resolver. Set a conditional forward rule for the Active Directory domain to the Active Directory servers. Update the VPC DHCP options set to AmazonProvidedDNS.
D. Update the DNS service on the client instances to split DNS queries between the Active Directory servers and the VPC Resolver.
E. Update the DNS service on the Active Directory servers to forward all queries to the VPC Resolver.

A company hosts a blog post application on AWS using Amazon API Gateway, Amazon DynamoDB, and AWS Lambda. The application currently does not use API keys to authorize requests. The API model is as follows:
GET/posts/[postid] to get post details GET/users[userid] to get user details GET/comments/[commentid] to get comments details
The company has noticed users are actively discussing topics in the comments section, and the company wants to increase user engagement by marking the comments appears in real time.
Which design should be used to reduce comment latency and improve user experience?

A. Use edge-optimized API with Amazon CloudFront to cache API responses.
B. Modify the blog application code to request GET comment[commented] every 10 seconds.
C. Use AWS AppSync and leverage WebSockets to deliver comments.
D. Change the concurrency limit of the Lambda functions to lower the API response time.

A company is planning on hosting its ecommerce platform on AWS using a multi-tier web application designed for a NoSQL database. The company plans to use the us-west-2 Region as its primary Region. The company wants to ensure that copies of the application and data are available in second Region, us-west-1, for disaster recovery. The company wants to keep the time to fail over as low as possible. Failing back to the primary Region should be possible without administrative interaction after the primary service is restored.
Which design should the solutions architect use?

A. Use AWS CloudFormation StackSets to create the stacks in both Regions with Auto Scaling groups for the web and application tiers. Asynchronously replicate static content between Regions using Amazon S3 cross-Region replication. Use an Amazon Route 53 DNS failover routing policy to direct users to the secondary site in us-west-1 in the event of an outage. Use Amazon DynamoDB global tables for the database tier.
B. Use AWS CloudFormation StackSets to create the stacks in both Regions with Auto Scaling groups for the web and application tiers. Asynchronously replicate static content between Regions using Amazon S3 cross-Region replication. Use an Amazon Route 53 DNS failover routing policy to direct users to the secondary site in us-west-1 in the event of an outage Deploy an Amazon Aurora global database for the database tier.
C. Use AWS Service Catalog to deploy the web and application servers in both Regions Asynchronously replicate static content between the two Regions using Amazon S3 cross-Region replication. Use Amazon Route 53 health checks to identify a primary Region failure and update the public DNS entry listing to the secondary Region in the event of an outage. Use Amazon RDS for MySQL with cross-Region replication for the database tier.
D. Use AWS CloudFormation StackSets to create the stacks in both Regions using Auto Scaling groups for the web and application tiers. Asynchronously replicate static content between Regions using Amazon S3 cross-Region replication. Use Amazon CloudFront with static files in Amazon S3, and multi-Region origins for the front-end web tier. Use Amazon DynamoDB tables in each Region with scheduled backups to Amazon S3.

A solutions architect needs to migrate 50 TB of NFS data to Amazon S3. The files are on several NFS file servers on corporate network. These are dense file systems containing tens of millions of small files. The system operators have configured the file interface on an AWS Snowball Edge device and are using a shell script to copy data.
Developers report that copying the data to the Snowball Edge device is very slow. The solutions architect suspects this may be related to the overhead of encrypting all the small files and transporting them over the network.
Which changes can be made to speed up the data transfer?

A. Cluster two Snowball Edge devices together to increase the throughput of the devices.
B. Change the solution to use the S3 Adapter instead of the file interface on the Snowball Edge device.
C. Increase the number of parallel copy jobs to increase the throughput of the Snowball Edge device.
D. Connect directly to the USB interface on the Snowball Edge device and copy the files locally.

A solutions architect is designing a network for a new cloud deployment. Each account will need autonomy to modify route tables and make changes. Centralized and controlled egress internet connectivity is also needed. The cloud footprint is expected to grow to thousands of AWS accounts.
Which architecture will meet these requirements?

A. A centralized transit VPC with a VPN connection to a standalone VPC in each account. Outbound internet traffic will be controlled by firewall appliances.
B. A centralized shared VPC with a subnet for each account. Outbound internet traffic will be controlled through a fleet of proxy servers.
C. A shared services VPC to host central assets to include a fleet of firewalls with a route to the internet. Each spoke VPC will peer to the central VPC.
D. A shared transit gateway to which each VPC will be attached. Outbound internet access will route through a fleet of VPN-attached firewalls.