EXAMS AWS CERTIFIED DEVELOPER - ASOCIATE 32

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A Developer created a Lambda function for a web application backend.

When testing the Lambda function from the AWS Lambda console, the Developer can see that the function is being executed, but there is no log data being generated in Amazon CloudWatch Logs, even after several minutes. What could cause this situation?

https://docs.aws.amazon.com/lambda/latest/dg/monitoring-functions.html (see note)

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A current architecture uses many Lambda functions invoking one another as large state machine.

The coordination of this state machine is legacy custom code that breaks easily.

Which AWS Service can help refactor and manage the state machine?

https://docs.aws.amazon.com/step-functions/latest/dg/tutorial-creating-lambda-state- machine.html

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A Developer created a dashboard for an application using Amazon API Gateway, Amazon S3, AWS Lambda, and Amazon RDS.

The Developer needs an authentication mechanism allowing a user to sign in and view the dashboard. It must be accessible from mobile applications, desktops, and tablets, and must remember user preferences across platforms.

Which AWS service should the Developer use to support this authentication scenario?

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Auser has created a MySQLRDSinstance. Which of the below mentioned options is mandatory to configure while creating an instance?

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ADeveloper has implemented a Lambda function that needs to add new customers to an RDSdatabase that is expected to run hundreds of times per hour.

The Lambda function is configured to use 512MBof RAMand is based on the following pseudo code

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ADeveloper is creating a Lambda function and will be using external libraries that are not included in the standard Lambda libraries.

What action would minimize the Lambda compute time consumed?

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What does Amazon SQS provide?

Amazon SQS stands for Simple Queue Services, and provides a cost-effective way to decouple the components of your application through an asynchronous message queue service http://aws.amazon.com/sqs/

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An online gaming site asked you if you can deploy a database that is a fast, highly scalable NoSQL database service in AWS for a new site that he wants to build.

Which database should you recommend?

Amazon DynamoDB is ideal for database applications that require very low latency and predictable performance at any scale but don't need complex querying capabilities like joins or transactions. Amazon DynamoDB is a fully-managed NoSQL database service that offers high performance, predictable throughput and low cost. It is easy to set up, operate, and scale. With Amazon DynamoDB, you can start small, specify the throughput and storage you need, and easily scale your capacity requirements on the fly. Amazon DynamoDB automatically partitions data over a number of servers to meet your request capacity. In addition, DynamoDB automatically replicates your data synchronously across multiple Availability Zones within an AWS Region to ensure high-availability and data durability. https://aws.amazon.com/running_databases/#dynamodb_anchor

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