A global company has a mobile app with static data stored in an Amazon S3 bucket in the us-east-1 Region. The company serves the content through an Amazon CloudFront distribution The company is launching the mobile app In South Africa The data must reside in the af south 1 Region The company does not want to deploy a specific, mobile client for South Africa.
What should the company do to meet these requirements?
A. Use the CloudFront geographic restriction feature to block access to users in South Africa
B. Create a Lambda@Edge function Associate the Lambda@Edge function as an origin request trigger with the CloudFront distribution to change the S3 origin Region
C. Create a Lambda@Edge function. Associate the Lambda@Edge function as a viewer response trigger with the CloudFront distribution to change the S3 origin Region
D. Include af-south-1 in the alternate domain name (CNAME) of the CloudFront distribution
A company's ecommerce website is experiencing sudden and significant traffic changes that are causing performance problems in the company database. Users report that attempts to access the website are taking too long. A developer needs to implement a caching layer by using Amazon ElastiCache. The website must be responsive, no matter which product a user views Updates to product information and prices must be strongly consistent. Which cache-writing strategy will meet these requirements?
A. Write to the cache directly Synchronize the backend later
B. Write to the backend first Wait for the cache to expire
C. Write to the cache and the backend at the same time
D. Write to the backend first. Then update the TTL of the item in the cache=
A company created an application to consume and process data. The application uses Amazon Simple Queue Service (Amazon SQS) and AWS Lambda functions. The application is currently working as expected, but it occasionally receives
several messages that it cannot process properly The company needs to clear these messages to prevent the queue from becoming blocked.
A developer must implement a solution that makes queue processing always operational. The solution must give the company the ability to defer the messages with errors and save these messages for further analysis.
What is the MOST operationally efficient solution that meets these requirements?
A. Configure Amazon CloudWatch Logs to save the error messages to a separate log stream
B. Create a new SQS queue. Set the new queue as a dead-letter queue for the application queue Configure the Maximum Receives setting.
C. Change the SQS queue to a FIFO queue Configure the message retention penod to 0 seconds
D. Configure an Amazon CloudWatch alarm for Lambda function errors Publish messages to an Amazon Simple Notification Service (Amazon SNS) topic to notify administrator users
A company is developing a report implemented using AWS Step Functions. Amazon CloudWatch shows errors in the Step Functions task state machine. To troubleshoot each task the state input needs to be included along with the error message in the state output.
Which coding practice can preserve both the original input and the error for the state?
A. Use ResultPath in a Catch statement to include the error with the original input
B. Use InputPath in a Catch statement and set the value to null.
C. Use ErrorEquals in a Retry statement to include the error with the original input
D. Use OutputPath in a Retry statement and set the value to $.
A developer received the following error message during an AWS Cloud Formation deployment. Which action should the developer lake lo resolve this error?
A. Contact AWS Support to report an Issue with the Auto Scaling Groups (ASG) service
B. Add a DependsOn attribute to the ASGInstanceRole12345678 resource in the Cloud Formation template Then delete the stack
C. Modify the CloudFormation template to retain the ASGInstanceRole12345678 resource Then manually delete the resource after deployment
D. Add a force parameter when calling CloudFormation with the role-am of ASGInstanceRoiei2345678
A developer is building a serverless application that is based on AWS Lambda. The developer initializes the AWS software development kit (SDK) outside of the Lambda handler function. What is the PRIMARY benefit of this action?
A. Improves legibility and stylistic convention
B. Takes advantage of runtime environment reuse
C. Provides better error handling
D. Creates a new SDK instance for each invocation
A developer needs to build and deploy a serverless application that has an API that mobile clients will use. The API will use Amazon DynamoDB and Amazon OpenSearch Service (Amazon Elasticsearch Service) as data sources Responses
that are sent to the clients will contain aggregated data from both data sources.
The developer must minimize the number of API endpoints and must minimize the number of API calls that are required to retrieve the necessary data.
Which solution should the developer use to meet these requirements?
A. GraphQI. API on AWS AppSync
B. REST API on Amazon API Gateway
C. GraphGL API on an Amazon EC2 instance
D. REST API on AWS Elastic Beanstalk
A developer is writing an application to analyze the traffic to a fleet of Amazon EC2 instances. The EC2 instances run behind a public Application Load Balancer (ALB) An HTTP server runs on each of the EC2 instances, logging all requests
to a log file.
The developer wants to capture the client public IP addresses. The developer analyzes the log files and notices only the IP address of the ALB.
What must the developer do to capture the client public IP addresses in the log file?
A. Add a Host header to the HTTP server log configuration file.
B. Install the Amazon CloudWatch Logs agent on each EC2 instance Configure the agent to write to the log file
C. Install the AWS X-Ray daemon on each EC2 instance. Configure the daemon to write to the log file
D. Add an X-Forwarded-For header to the HTTP server log configuration file
A static website is hosted in an Amazon S3 bucket Several HTML pages on the site use JavaScript to download images from another Amazon S3 bucket These images are not displayed when users browse the site. What is the possible cause for the issue?
A. The referenced Amazon S3 bucket is in another region
B. The images must be stored in the same Amazon S3 bucket
C. Port 80 must be opened on the security group in which the Amazon S3 bucket is located
D. Cross Origin Resource Sharing must be enabled on the Amazon S3 bucket
A company has a two-tier application running on an Amazon EC2 server that handles all of its AWS based e-commerce activity. During peak times, the backend servers that process orders are overloaded with requests This results in some orders falling to process A developer needs to create a solution that will re factor the application,
Which steps will allow for more flexibility during peak times, while still remaining cost- effective? (Select TWO.)
A. Increase the backend T2 EC2 instance sizes to xi to handle the largest possible load throughout the year
B. Implement an Amazon SQS queue to decouple the front-end and backend servers.
C. Use an Amazon SNS queue to the couple the front-end and backend servers
D. Migrate the backend servers to on-premises and pull from an Amazon SNS queue
E. Modify the backend servers to pull from an Amazon SQS queue.
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