An organization is using Amazon CloudFront to ensure that its users experience low-latency access to its web application. The organization has identified a need to encrypt all traffic between users and CloudFront, and all traffic between CloudFront and the web application.
How can these requirements be met? (Select TWO)

• A.Use AWS KMS t0 encrypt traffic between cloudFront and the web application.
• B.Set the Origin Protocol Policy to "HTTPS Only".
• C.Set the Origin's HTTP Port to 443.
• D.Set the Viewer Protocol Policy to "HTTPS Only" or Redirect HTTP 10 HTTPS"
• E.Enable the CloudFront option Restrict Viewer Access.

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A developer has an application that makes batch requests directly to Amazon DynamoDB by using the BatchGetItem low-level API operation. The responses frequently return values in the UnprocessedKeys element.
Which actions should the developer take to increase the resiliency of the application when the batch response includes values in UnprocessedKeys? (Choose two.)

• A.Retry the batch operation immediately.
• B.Retry the batch operation with exponential backoff and randomized delay.
• C.Update the application to use an AWS software development kit (AWS SDK) to make the requests.
• D.Increase the provisioned read capacity of the DynamoDB tables that the operation accesses.
• E.Increase the provisioned write capacity of the DynamoDB tables that the operation accesses.

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A company is using Amazon RDS as the Backend database for its application. After a recent marketing campaign, a surge of read requests to the database increased the latency of data retrieval from the database.
The company has decided to implement a caching layer in front of the database. The cached content must be encrypted and must be highly available.
Which solution will meet these requirements?

• A.Amazon Cloudfront
• B.Amazon ElastiCache to Memcached
• C.Amazon ElastiCache for Redis in cluster mode
• D.Amazon DynamoDB Accelerate (DAX)

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A company is migrating an on-premises database to Amazon RDS for MySQL. The company has read-heavy workloads. The company wants to refactor the code to achieve optimum read performance for queries.
Which solution will meet this requirement with LEAST current and future effort?

• A.Use a multi-AZ Amazon RDS deployment. Increase the number of connections that the code makes to the database or increase the connection pool size if a connection pool is in use.
• B.Use a multi-AZ Amazon RDS deployment. Modify the code so that queries access the secondary RDS instance.
• C.Deploy Amazon RDS with one or more read replicas. Modify the application code so that queries use the URL for the read replicas.
• D.Use open source replication software to create a copy of the MySQL database on an Amazon EC2 instance. Modify the application code so that queries use the IP address of the EC2 instance.

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A developer is trying get data from an Amazon DynamoDB table called demoman-table. The developer configured the AWS CLI to use a specific IAM use's credentials and ran the following command.

The command returned errors and no rows were returned.
What is the MOST likely cause of these issues?

• A.The command is incorrect; it should be rewritten to use put-item with a string argument
• B.The developer needs to log a ticket with AWS Support to enable access to the demoman-table
• C.Amazon DynamoOB cannot be accessed from the AWS CLI and needs to called via the REST API
• D.The IAM user needs an associated policy with read access to demoman-table

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