A company has a multi-node Windows legacy application that runs on premises. The application uses a network shared folder as a centralized configuration repository to store configuration files in .xml format. The company is migrating the application to Amazon EC2 instances. As part of the migration to AWS, a developer must identify a solution that provides high availability for the repository. Which solution will meet this requirement MOST cost-effectively?

• A.Mount an Amazon Elastic Block Store (Amazon EBS) volume onto one of the EC2 instances.
  Deploy a file system on the EBS volume. Use the host operating system to share a folder. Update the application code to read and write configuration files from the shared folder.
• B.Deploy a micro EC2 instance with an instance store volume. Use the host operating system to share a folder. Update the application code to read and write configuration files from the shared folder.
• C.Create an Amazon S3 bucket to host the repository. Migrate the existing .xml files to the S3 bucket. Update the application code to use the AWS SDK to read and write configuration files from Amazon S3.
• D.Create an Amazon S3 bucket to host the repository. Migrate the existing .xml files to the S3 bucket. Mount the S3 bucket to the EC2 instances as a local volume. Update the application code to read and write configuration files from the disk.

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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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A company's application has an AWS Lambda function that processes messages from IoT devices. The company wants to monitor the Lambda function to ensure that the Lambda function is meeting its required service level agreement (SLA).
A developer must implement a solution to determine the application's throughput in near real time. The throughput must be based on the number of messages that the Lambda function receives and processes in a given time period. The Lambda function performs initialization and post-processing steps that must not factor into the throughput measurement.
What should the developer do to meet these requirements?

• A.Use the Lambda function's ConcurrentExecutions metric in Amazon CloudWatch to measure the throughput.
• B.Modify the application to log the calculated throughput to Amazon CloudWatch Logs. Use Amazon EventBridge to invoke a separate Lambda function to process the logs on a schedule.
• C.Modify the application to publish custom Amazon CloudWatch metrics when the Lambda function receives and processes each message. Use the metrics to calculate the throughput.
• D.Use the Lambda function's Invocations metric and Duration metric to calculate the throughput in Amazon CloudWatch.

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A developer needs to give a new application the ability to retrieve configuration data. The application must be able to retrieve new configuration data values without the need to redeploy the application code. If the application becomes unhealthy because of a bad configuration change, the developer must be able to automatically revert the configuration change to the previous value.
Which solution will meet these requirements?

• A.Use AWS Secrets Manager to manage and store the configuration data. Integrate Secrets Manager with a custom AWS Config rule that has remediation actions to track changes in the application and to roll back any bad configuration changes.
• B.Use AWS Secrets Manager to manage and store the configuration data. Integrate Secrets Manager with a custom AWS Config rule. Attach a custom AWS Systems Manager document to the rule that automatically rolls back any bad configuration changes.
• C.Use AWS AppConfig to manage and store the configuration data. Integrate AWS AppConfig with Amazon CloudWatch to monitor changes to the application. Set up an alarm to automatically roll back any bad configuration changes.
• D.Use AWS AppConfig to manage and store the configuration data. Integrate AWS AppConfig with Amazon CloudWatch to monitor changes to the application. Set up CloudWatch Application Signals to roll back any bad configuration changes.

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A company deploys a new application to AWS. The company is streaming application logs to Amazon CloudWatch Logs. The company's development team must receive notification by email when the word "ERROR" appears in any log lines. A developer sets up an Amazon SNS topic and subscribes the development team to the topic.
What should the developer do next to meet the requirements?

• A.Select the appropriate log group. Create a CloudWatch metric filter with "ERROR" as the search term. Create an alarm on this metric that notifies the SNS topic when the metric is 1 or higher.
• B.In CloudWatch Logs Insights, select the appropriate log group. Create a metric query to search for the term "ERROR" in the logs. Create an alarm on this metric that notifies the SNS topic when the metric is 1 or higher.
• C.Select the appropriate log group. Create an SNS subscription filter with "ERROR" as the filter pattern. Select the SNS topic as the destination.
• D.Create a CloudWatch alarm that includes "ERROR" as a filter pattern, a log group dimension that defines the appropriate log group, and a destination that notifies the SNS topic.

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