A company is building an application to track athlete performance using an Amazon DynamoDB table. Each item in the table is identified by a partition key (user_id) and a sort key (sport_name). The table design is shown below:

(Note: Not all table attributes are shown)
A Developer is asked to write a leaderboard application to display the top performers (user_id) based on the score for each sport_name.
What process will allow the Developer to extract results MOST efficiently from the DynamoDB table?

• A.Use a DynamoDB query operation with the key attributes of user_id and sport_name and order the results based on the score attribute.
• B.Create a global secondary index with a partition key of sport_name and a sort key of score, and get the results
• C.Use a DynamoDB scan operation to retrieve scores and user_id based on sport_name, and order the results based on the score attribute.
• D.Create a local secondary index with a primary key of sport_name and a sort key of score and get the results based on the score attribute.

Comment: *

Name: *

Email: *

Verification: *

A developer has written a serverless application and wants to deploy it to AWS Lambda to leverage the function's multi-threaded execution to improve performance. Which action should the developer take to achieve these requirements?

• A.Use unreserved account concurrency.
• B.increase the Lambda function execution timeout
• C.Set the reserved concurrency of the Lambda function to a higher number
• D.Increase the memory allocation of the Lambda function

Comment: *

Name: *

Email: *

Verification: *

A company is creating a REST service using an Amazon API Gateway with AWS Lambda integration. The service must run different versions for testing purposes.
What would be the BEST way to accomplish this?

• A.Use an X-Version header to denote which version is being called and pass that header to the Lambda function(s)
• B.Create an API Gateway Lambda authorizer to route API clients to the correct API version
• C.Create an API Gateway resource policy to isolate versions and provide context to the Lambda function(s)
• D.Deploy the API versions as unique stages with unique endpoints and use stage variables to provide further context

Comment: *

Name: *

Email: *

Verification: *

An application running on EC2 instances is storing data in an S3 bucket. Security policy mandates that all data must be encrypted in transit.
How can the Developer ensure that all traffic to the S3 bucket is encrypted?

• A.Install certificates on the EC2 instances.
• B.Create a bucket policy that allows traffic where SecureTransport is true.
• C.Create an HTTPS redirect on the EC2 instances.
• D.Create a bucket policy that denies traffic where SecureTransport is false.

Comment: *

Name: *

Email: *

Verification: *

A Developer must re-implement the business logic for an order fulfilment system. The business logic has to make requests to multiple vendors to decide where to purchase an item. The whole process can take up to a week to complete.
What is the MOST efficient and SIMPLEST way to implement a system that meets these requirements?

• A.Use AWS Step Functions to execute parallel Lambda functions, and join the results.
• B.Create an AWS SQS for each vendor, poll the queue from a worker instance, and joint the results.
• C.Use AWS Lambda to asynchronously call a Lambda function for each vendor, and join the results.
• D.Use Amazon CloudWatch Events to orchestrate the Lambda functions.

Comment: *

Name: *

Email: *

Verification: *