A Developer has been asked to create an AWS Lambda function that is triggered any time updates are made to items in an Amazon DynamoDB table. The function has been created, and appropriate permissions have been added to the Lambda execution role. Amazon DynamoDB streams have been enabled for the table, but the function is still not being triggered.
Which option would enable DynamoDB table updates to trigger the Lambda function?

• A.Configure event source mapping for the Lambda function
• B.Map an Amazon SNS topic to the DynamoDB streams
• C.increase the maximum execution time (timeout) setting of the Lambda function
• D.Change the StreamViewType parameter value to NEW_AND_OLD_IMAGES for the DynamoDB table

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An application has hundreds of users. Each user may use multiple devices to access the application. The Developer wants to assign unique identifiers to these users regardless of the device they use.
Which of the following methods should be used to obtain unique identifiers?

• A.Use IAM-generated access key IDs for the users as the unique identifier, but do not store secret keys.
• B.Create a user table in Amazon DynamoDB as key-value pairs of users and their devices. Use these keys as unique identifiers.
• C.Implement developer-authenticated identities by using Amazon Cognito, and get credentials for these identities.
• D.Assign IAM users and roles to the users. Use the unique IAM resource ID as the unique identifier.

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What item operation allows the retrieval of multiple items from a DynamoDB table in a single API call?

• A.GetItem
• B.BatchGetItem
• C.GetMultipleItems
• D.GetItemRange

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A developer is building an application that processes a stream of user-supplied data The data stream must be consumed by multiple Amazon EC2 based processing applications in parallel and in real time. Each processor must be able to resume without losing data if there is a service interruption. The Application Architect plans to add other processors in the near future, and wants to minimize the amount of data duplication involved.
Which solution will satisfy these requirements?

• A.Publish the data to Amazon Kinesis Data Firehose
• B.Publish the data to Amazon SQS
• C.Publish the data to Amazon CloudWatch Events.
• D.Publish the data to Amazon Kinesis Data Streams.

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You have written an application that uses the Elastic Load Balancing service to spread traffic to several web servers. Your users complain that they are sometimes forced to login again in the middle of using your application, after they have already logged in. This is not behavior you have designed.
What is a possible solution to prevent this happening?

• A.Use instance memory to save session state.
• B.Use instance storage to save session state.
• C.Use EBS to save session state
• D.Use ElastiCache to save session state.
• E.Use Glacier to save session slate.

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