A developer is working on a serverless application. The application uses Amazon API Gateway. AWS Lambda functions that are written in Python, and Amazon DynamoDB.
Which combination of steps should the developer take so that the Lambda functions can be debugged in the event of application failures? (Select TWO )

• A.Configure an AWS CloudTrail trail to deliver log files to an Amazon S3 bucket
• B.Ensure that the execution role for the Lambda function has access to write to Amazon CloudWatch Logs.
• C.Use the Amazon CloudWatch metric for Lambda errors to create a CloudWatch alarm.
• D.Ensure that the Lambda functions write log messages to stdout and stderr
• E.Enable an AWS CloudTrail trail for the Lambda function

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A Development team has pushed out 10 applications running on several Amazon EC2 instances. The Operations team is asking for a graphical representation of one key performance metric for each application. These metrics should be available on one screen for easy monitoring.
Which steps should the Developer take to accomplish this using Amazon CloudWatch?

• A.Create a custom namespace with a unique metric name for each application.
• B.Create a custom dimension with a unique metric name for each application.
• C.Create a custom event with a unique metric name for each application.
• D.Create a custom alarm with a unique metric name for each application.

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A company has an application that uses Amazon Cognito user pools as an identity provider. The company must secure access to user records. The company I up multi-factor authentication (MFA). The company also wants to send a login activity notification by email every time a user logs in.
What is the MOST operationally efficient solution that meets this requirement?

• A.Create an AWS Lambda function that uses Amazon Simple Email Service (Amazon SES) to send the email notification. Create an Amazon CloudWatch Logs log subscription filter to invoke the function based on the login status.
• B.Create an AWS Lambda function that uses Amazon Simple Email Service (Amazon SES) to send the email notification. Add an Amazon Cognito post authentication Lambda trigger for the function.
• C.Configure Amazon Cognito to stream all logs to Amazon Kinesis Data Firehose. Create an AWS Lambda function to process the streamed logs and it send the email notification based on the login status of each user.
• D.Create an AWS Lambda function that uses Amazon Simple Email Service (Amazon SES) to send the email notification. Add an Amazon API Gateway to invoke the function. Call the API from the client side when login confirmation is received.

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A company caches session information for a web application in an Amazon DynamoDB table. The company wants an automated way to delete old items from the table.
What is the simplest way to do this?

• A.Write a script that deletes old records; schedule the scripts as a cron job on an Amazon EC2 instance.
• B.Add an attribute with the expiration time; enable the Time To Live feature based on that attribute.
• C.Each day, create a new table to hold session data; delete the previous day's table.
• D.Add an attribute with the expiration time; name the attribute ItemExpiration.

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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.

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