AWS-DEVELOPER-ASSOCIATE

A company is developing a new application that uses Amazon EC2, Amazon S3, and AWS Lambda resources. The company wants to allow employees to access the AWS Management Console by using existing credentials that the company stores and manages in an on-premises Microsoft Active Directory. Each employee must have a specific level of access to the AWS resources that is based on the employee’s role. Which solution will meet these requirements with the LEAST operational overhead?

A developer has created an AWS Lambda function that is written in Python. The Lambda function reads data from objects in Amazon S3 and writes data to an Amazon DynamoDB table. The function is successfully invoked from an S3 event notification when an object is created. However, the function fails when it attempts to write to the DynamoDB table. What is the MOST likely cause of this issue?

A developer is creating a mobile app that calls a backend service by using an Amazon API Gateway REST API. For integration testing during the development phase, the developer wants to simulate different backend responses without invoking the backend service. Which solution will meet these requirements with the LEAST operational overhead?

A company has an Amazon DynamoDB table that contains records of users that have signed up for a trial of the company’s product. The company is using a spreadsheet to track data about the product trial. The company needs to ensure the spreadsheet is automatically updated with the latest information when individual trials begin, are updated, or finish. Which solution will meet these requirements?

A developer is launching a global application that delivers content to multiple countries. The developer needs to serve specific content based on the country of each user and each user’s primary language. The developer must ensure that content is served reliably and with low latency. Which solution will meet these requirements?

A developer is creating a stock trading application. The developer needs a solution to send text messages to application users to confirmation when a trade has been completed. The solution must deliver messages in the order a user makes stock trades. The solution must not send duplicate messages. Which solution will meet these requirements?

A developer is deploying a new Node.js AWS Lambda function that is not connected to a VPC. The Lambda function needs to connect to and query an Amazon Aurora database that is not publicly accessible. The developer is expecting unpredictable surges in database traffic. What should the developer do to give the Lambda function access to the database?

A company generates SSL certificates from a third-party provider. The company imports the certificates into AWS Certificate Manager (ACM) to use with public web applications. A developer must implement a solution to notify the company’s security team 90 days before an imported certificate expires. The company already has configured an Amazon Simple Queue Service (Amazon SQS) queue. The company also has configured an Amazon Simple Notification Service (Amazon SNS) topic that has the security team’s email address as a subscriber. Which solution will provide the security team with the required notification about certificates?

A company uses two AWS accounts: production and development. The company stores data in an Amazon S3 bucket that is in the production account. The data is encrypted with an AWS Key Management Service (AWS KMS) customer managed key. The company plans to copy the data to another S3 bucket that is in the development account. A developer needs to use a KMS key to encrypt the data in the S3 bucket that is in the development account. The KMS key in the development account must be accessible from the production account, Which solution will meet these requirements?

A developer needs to migrate an online retail application to AWS to handle an anticipated increase in traffic. The application currently runs on two servers: one server for the web application and another server for the database. The web server renders webpages and manages session state in memory. The database server hosts a MySQL database that contains order details. When traffic to the application is heavy, the memory usage for the web server approaches 100% and the application slows down considerably. The developer has found that most of the memory increase and performance decrease is related to the load of managing additional user sessions. For the web server migration, the developer will use Amazon EC2 instances with an Auto Scaling group behind an Application Load Balancer. Which additional set of changes should the developer make to the application to improve the application's performance?

A developer designed an application on an Amazon EC2 instance. The application makes API requests to objects in an Amazon S3 bucket. Which combination of steps will ensure that the application makes the API requests in the MOST secure manner? (Choose two.)

An AWS Lambda function requires read access to an Amazon S3 bucket and requires read/write access to an Amazon DynamoDB table. The correct IAM policy already exists. What is the MOST secure way to grant the Lambda function access to the S3 bucket and the DynamoDB table?

A developer is using AWS Step Functions to automate a workflow. The workflow defines each step as an AWS Lambda function task. The developer notices that runs of the Step Functions state machine fail in the GetResource task with either an IllegalArgumentException error or a TooManyRequestsException error. The developer wants the state machine to stop running when the state machine encounters an IllegalArgumentException error. The state machine needs to retry the GetResource task one additional time after 10 seconds if the state machine encounters a TooManyRequestsException error. If the second attempt fails, the developer wants the state machine to stop running. How can the developer implement the Lambda retry functionality without adding unnecessary complexity to the state machine?

A developer is creating a serverless application that uses an AWS Lambda function. The developer will use AWS CloudFormation to deploy the application. The application will write logs to Amazon CloudWatch Logs. The developer has created a log group in a CloudFormation template for the application to use. The developer needs to modify the CloudFormation template to make the name of the log group available to the application at runtime. Which solution will meet this requirement?

A developer is creating an Amazon DynamoDB table by using the AWS CLI. The DynamoDB table must use server-side encryption with an AWS owned encryption key. How should the developer create the DynamoDB table to meet these requirements?

A developer has AWS Lambda functions that need to access a company's internal data science libraries and reference data. Separate teams manage the libraries and the data. The teams must be able to update and upload new data independently. The Lambda functions are connected to the company's central VPC. Which solution will provide the Lambda functions with access to the libraries and data?

A company has an application that uses an AWS Lambda function to consume messages from an Amazon Simple Queue Service (Amazon SQS) queue. The SQS queue is configured with a dead-letter queue. Due to a defect in the application, AWS Lambda failed to process some messages. A developer fixed the bug and wants to process the failed messages again. How should the developer resolve this issue?

A developer is creating an AWS Lambda function that is invoked by messages to an Amazon Simple Notification Service (Amazon SNS) topic. The messages represent customer data updates from a customer relationship management (CRM) system The developer wants the Lambda function to process only the messages that pertain to email address changes. Additional subscribers to the SNS topic will process any other messages. Which solution will meet these requirements in the LEAST development effort?

A developer is designing a fault-tolerant environment where client sessions will be saved. How can the developer ensure that no sessions are lost if an Amazon EC2 instance fails?

A developer is creating AWS CloudFormation templates to manage an application's deployment in Amazon Elastic Container Service (Amazon ECS) through AWS CodeDeploy. The developer wants to automatically deploy new versions of the application to a percentage of users before the new version becomes available for all users. How should the developer manage the deployment of the new version?

A developer has written a distributed application that uses microservices. The microservices are running on Amazon EC2 instances. Because of message volume, the developer is unable to match log output from each microservice to a specific transaction. The developer needs to analyze the message flow to debug the application. Which combination of steps should the developer take to meet this requirement? (Choose two.)

A company is working on a new serverless application. A developer needs to find an automated way to deploy AWS Lambda functions and the dependent infrastructure with minimum coding effort. The application also needs to be reliable. Which method will meet these requirements with the LEAST operational overhead?

A developer is working on an application that will be deployed on AWS. The developer needs to test and debug the code locally. The code is packaged and stored in an Amazon S3 bucket. How can the developer test and debug the code locally with the LEAST amount of configuration?

A developer is creating an application on Amazon Elastic Container Service (Amazon ECS). The developer needs to configure the application parameters. The developer must configure limits for the application's maximum number of simultaneous connections and maximum number of transactions per second. The maximum number of connections and transactions can change in the future. The developer needs a solution that can automatically deploy these changes to the application, as needed, without causing downtime. Which solution will meet these requirements?

A developer has built an application running on AWS Lambda using AWS Serverless Application Model (AWS SAM). What is the correct sequence of steps to successfully deploy the application?

A developer must provide an API key to an AWS Lambda function to authenticate with a third-party system. The Lambda function will run on a schedule. The developer needs to ensure that the API key remains encrypted at rest. Which solution will meet these requirements?

An IT department uses Amazon S3 to store sensitive images. After more than 1 year, the company moves the images into archival storage. The company rarely accesses the images, but the company wants a storage solution that maximizes resiliency. The IT department needs access to the images that have been moved to archival storage within 24 hours. Which solution will meet these requirements MOST cost-effectively?

A developer is building a serverless application by using the AWS Serverless Application Model (AWS SAM). The developer is currently testing the application in a development environment. When the application is nearly finished, the developer will need to set up additional testing and staging environments for a quality assurance team. The developer wants to use a feature of the AWS SAM to set up deployments to multiple environments. Which solution will meet these requirements with the LEAST development effort?

A developer is working on an application that processes operating data from IoT devices. Each IoT device uploads a data file once every hour to an Amazon S3 bucket. The developer wants to immediately process each data file when the data file is uploaded to Amazon S3. The developer will use an AWS Lambda function to process the data files from Amazon S3. The Lambda function is configured with the S3 bucket information where the files are uploaded. The developer wants to configure the Lambda function to immediately invoke after each data file is uploaded. Which solution will meet these requirements?

A developer is setting up infrastructure by using AWS CloudFormation. If an error occurs when the resources described in the Cloud Formation template are provisioned, successfully provisioned resources must be preserved. The developer must provision and update the CloudFormation stack by using the AWS CLI. Which solution will meet these requirements?