A developer is migrating a Windows-based legacy application from on premises to AWS. The application will run on Amazon EC2 instances that run Amazon Linux. The application stores a large number of files in an NFS drive. The migration solution must minimize downtime and application code changes.
Which solution should the developer use to migrate the application data?

• A.Create an Amazon Elastic File System (Amazon EFS) file system. Use AWS DataSync to transfer the files to Amazon EFS.
• B.Create an Amazon S3 bucket. Use the s3 sync command to upload the files to the S3 bucket.
• C.Create an Amazon Elastic Block Store (Amazon E8S) volume. Upload the files to the volume. Attach the volume to the EC2 instances.
• D.Create an Amazon Elastic File System (Amazon EFS) file system. Mount the EFS file system from the legacy application. Copy the files to the EFS mount.

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A developer needs to create an application that supports Security Assertion Markup Language (SAML) and Facebook authentication It must also allow access to AWS services, such as Amazon DynamoDB.
Which AWS service or feature will meet these requirements with the LEAST amount of additional coding?

• A.AWSAppSync
• B.Amazon Cognito identity pools
• C.Amazon Cognito user pools
• D.Amazon Lambda@Edge

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A Developer is writing a mobile application that allows users to view images from an S3 bucket. The users must be able to log in with their Amazon login, as well as Facebook® and/or Google® accounts.
How can the Developer provide this authentication functionality?

• A.Use Amazon Cognito with web identity federation.
• B.Use Amazon Cognito with SAML-based identity federation.
• C.Use AWS IAM Access/Secret keys in the application code to allow Get* on the S3 bucket.
• D.Use AWS STS AssumeRole in the application code and assume a role with Get* permissions on the S3 bucket.

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An application uses Amazon DynamoDB as its backend database The application experiences sudden spikes in traffic over the weekend and variable but predictable spikes during weekdays The capacity needs to be set to avoid throttling errors at all times How can this be accomplished cost-effectively?

• A.Use on-demand capacity throughout the week
• B.Use provisioned capacity with AWS Auto Scaling enabled during the weekend and reserved capacity enabled during the weekdays
• C.Use provisioned capacity with AWS Auto Scaling throughout the week.
• D.Use on-demand capacity for the weekend and provisioned capacity with AWS Auto Scaling during the weekdays

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A Developer wants to find a list of items in a global secondary index from an Amazon DynamoDB table.
Which DynamoDB API call can the Developer use in order to consume the LEAST number of read capacity units?

• A.Scan operation using eventually-consistent reads
• B.Query operation using strongly-consistent reads
• C.Query operation using eventually-consistent reads
• D.Scan operation using strongly-consistent reads

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