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A developer is exposing an API by using Amazon API Gateway and AWS Lambda as the backend for an application. The developer wants to add validation rules for a POST method to ensure that the data (rom the frontend web form is valid. The validation rules must include mandatory fields, data type, length, and regular expressions. Which solution will meet these requirements?
A. Create an API Gateway model with schema for data validation.
B. Create API Gateway HTTP request headers for data validation.
C. Create API Gateway URL query string parameters for data validation.
D. Create API Gateway URL path parameters for data validation
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. 1. Build the SAM template in Amazon EC2. 2. Package the SAM template to Amazon EBS storage. 3. Deploy the SAM template from Amazon EBS.
B. 1. Build the SAM template locally. 2. Package the SAM template onto Amazon S3. 3. Deploy the SAM template from Amazon S3.
C. 1. Build the SAM template locally. 2. Deploy the SAM template from Amazon S3. 3. Package the SAM template for use.
D. 1. Build the SAM template locally. 2 Package the SAM template from AWS CodeCommit.
An open-source map application gathers data from several geolocation APIs. The application's source code repository is public and can be used by anyone, but the geolocation APIs must not be directly accessible. A developer must implement a solution to prevent the credentials that are used to access the APIs from becoming public. The solution also must ensure that the application still functions properly. Which solution will meet these requirements MOST cost-effectively?
A. Store the credentials in AWS Secrets Manager. Retrieve the credentials by using the
GetSecretValue API operation.
B. Store the credentials in AWS Key Management Service (AWS KMS). Retrieve the credentials by using the GetPublicKey API operation.
C. Store the credentials in AWS Security Token Service (AWS STS). Retrieve the credentials by using the GetCallerldentity API operation.
D. Store the credentials in AWS Systems Manager Parameter Store. Retrieve the credentials by using the GetParameter API operation.
An application that is running on Amazon EC2 instances stores data in an Amazon S3 bucket. All the data must be encrypted in transit. How can a developer ensure that all traffic to the S3 bucket is encrypted?
A. Install certificates on the EC2 instances.
B. Create a private VPC endpoint.
C. Configure the S3 bucket with server-side encryption with AWS KMS managed encryption keys (SSE-KMS).
D. Create an S3 bucket policy that denies traffic when the value for the aws:SecureTransport condition key is false.
A company uses Amazon DynamoDB as a data store for its order management system. The company frontend application stores orders in a DynamoDB table. The DynamoDB table is configured to send change events to a DynamoDB stream. The company uses an AWS Lambda function to log and process the incoming orders based on data from the DynamoDB stream. An operational review reveals that the order quantity of incoming orders is sometimes set to 0. A developer needs to create a dashboard that will show how many unique customers this problem affects each day. What should the developer do to implement the dashboard?
A. Grant the Lambda function's execution role permissions to upload logs to Amazon
CloudWatch Logs. Implement a CloudWatch Logs Insights query that selects the number of
unique customers for orders with order quantity equal to 0 and groups the results in 1-day
periods. Add the CloudWatch Logs Insights query to a CloudWatch dashboard.
B. Use Amazon Athena to query AWS CloudTrail API logs for API calls. Implement an Athena query that selects the number of unique customers for orders with order quantity equal to 0 and groups the results in 1 -day periods. Add the Athena query to an Amazon CloudWatch dashboard.
C. Configure the Lambda function to send events to Amazon EventBridge. Create an EventBridge rule that groups the number of unique customers for orders with order quantity equal to 0 in 1 -day periods. Add a CloudWatch dashboard as the target of the rule.
D. Turn on custom Amazon CloudWatch metrics for the DynamoDB stream of the DynamoDB table. Create a CloudWatch alarm that groups the number of unique customers for orders with order quantity equal to 0 in 1-day periods. Add the CloudWatch alarm to a CloudWatch dashboard.
A company that manages movie reviews wants to make its movie review data available to its customers by calling a set of REST web service endpoints. The company will develop the retrieval functionality as AWS Lambda functions and will expose the functionality to customers as an Amazon API Gateway REST API. The company needs to ensure that no consumer exceeds 100 requests a day to the API during the initial deployment. The company decides to use API Gateway API keys to restrict access. The company creates and issues API keys for each customer. What should the company do next to meet these requirements with the LEAST administrative effort?
A. Create a usage plan that applies throttling at 100 requests a day. Associate the usage
plan with the API keys of all customers.
B. Create an Amazon DynamoDB table to track all the requests that use a particular API key. For each request to the API, count the number of records in the DynamoDB table for that day for the API key. If the number of requests is 100 or greater, generate an exception.
C. Create a usage plan that applies a quota of 100 requests a day. Associate the usage plan with the API keys of all customers.
D. Create an Amazon Aurora table to track all the requests that use a particular API key. For each request to the API, count the number of records in the Aurora table for that day for the API key. If the number of requests is 100 or greater, generate an exception.
A company uses AWS CloudFormation to deploy an application that uses an Amazon API Gateway REST API with AWS Lambda function integration. The application uses Amazon DynamoDB for data persistence. The application has three stages, development, testing, and production. Each stage uses its own DynamoDB table. The company has encountered unexpected issues when promoting changes to the production stage. The changes were successful in the development and testing stages. A developer needs to route 20% of the traffic to the new production stage API with the next production release. The developer needs to route the remaining 80% of the traffic to the existing production stage. The solution must minimize the number of errors that any single customer experiences. Which approach should the developer take to meet these requirements?
A. Update 20% of the planned changes to the production stage. Deploy the new production
stage. Monitor the results. Repeat this process five times to test all planned changes
B. Update the Amazon Route 53 DNS record entry for the production stage API to use a weighted routing policy Set the weight to a value of 80. Add a second record for the production domain name Change the second routing policy to a weighted routing policy. Set the weight of the second policy to a value of 20. Change the alias of the second policy to use the testing stage API.
C. Deploy an Application Load Balancer (ALB) in front of the REST API Change the production API Amazon Route 53 record to point traffic to the ALB Register the production and testing stages as targets of the ALB with weights of 80% and 20%. respectively.
D. Configure canary settings for the production stage API. Change the percentage of traffic directed to canary deployment to 20%. Make the planned updates to the production stage Deploy the changes.
A developer runs an application that uses an Amazon API Gateway REST API. The developer needs to implement a solution to proactively monitor the health of both API responses and latencies in case a deployment causes a service disruption despite passing deployment pipeline tests. The solution also must check for endpoint vulnerability and unauthorized changes to APIs. URLs, and website content. Which solution will meet these requirements?
A. Use the Amazon CloudWatch Synthetics canary functionality to call the API and check the responses and duration of the request.
B. Use a custom health check in the API that queries hosts to check the duration of the request.
C. Implement a custom AWS Lambda function with an Amazon EventBridge event to periodically call the API and check the responses and duration of the request.
D. Use the built-in API Gateway metrics to monitor the average duration of the API response.
A developer is testing a new file storage application that uses an Amazon CloudFront distribution to serve content from an Amazon S3 bucket. The distribution accesses the S3 bucket by using an origin access identity (OAI). The S3 bucket's permissions explicitly deny access to all other users. The application prompts users to authenticate on a login page and then uses signed cookies to allow users to access their personal storage directories. The developer has configured the distribution to use its default cache behavior with restricted viewer access and has set the origin to point to the S3 bucket. However, when the developer tries to navigate to the login page, the developer receives a 403 Forbidden error. The developer needs to implement a solution to allow unauthenticated access to the login page. The solution also must keep all private content secure. Which solution will meet these requirements?
A. Add a second cache behavior to the distribution with the same origin as the default
cache behavior. Set the path pattern for the second cache behavior to the path of the login
page, and make viewer access unrestricted. Keep the default cache behavior’s settings
B. Add a second cache behavior to the distribution with the same origin as the default cache behavior. Set the path pattern for the second cache behavior to *, and make viewer access restricted. Change the default cache behavior's path pattern to the path of the login page, and make viewer access unrestricted.
C. Add a second origin as a failover origin to the default cache behavior. Point the failover origin to the S3 bucket. Set the path pattern for the primary origin to * and make viewer access restricted. Set the path pattern for the failover origin to the path of the login page, and make viewer access unrestricted.
D. Add a bucket policy to the S3 bucket to allow read access. Set the resource on the policy to the Amazon Resource Name (ARN) of the login page object in the S3 bucket. Add a CloudFront function to the default cache behavior to redirect unauthorized requests to the login page’s S3 URI.
A movie fan club hosts a serverless web application in an Amazon S3 bucket. The application uses an AWS Lambda function that is exposed by an Amazon API Gateway API. The function queries an Amazon DynamoDB table to list actors sorted by movie. In the DynamoDB table. Actor is the primary key, Movie is the sort key, and Role and Year are attributes. In the web application, a developer wants to add a page that is named Phase 1 that lists only the movies that were released between 2008 and 2012. The developer needs to fetch the Phase 1 items in a way that minimizes the impact on the DynamoDB table. Which solution will meet these requirements?
A. Create a global secondary index (GSl) with the Year attribute as the sort key. Create a Lambda function to return the results from a new method in the API.
B. Design a Lambda function that scans the DynamoDB table and filters the results for the Phase 1 items. Invoke the function from a new method in the API.
C. Use a DynamoDB stream to send items that are filtered by Year to a new DynamoDB table. Invoke a Lambda function from a new method in the API.
D. Set up an Amazon CloudFront distribution. Create a Lambda@Edge function to filter the items that are returned from the API request.
A company manages a financial services application that stores a large volume of data in an Amazon DynamoDB table. A developer needs to improve the performance of the DynamoDB read queries without increasing the cost. Which solution meets these requirements?
A. Use parallel scans
B. Add a local secondary index (LSI).
C. Create a DynamoDB Accelerator (DAX) cluster.
D. Query with the Projection Expression parameter
A developer is troubleshooting a new AWS Lambda function. The function should run automatically each time a new object is uploaded to an Amazon S3 bucket. However, the developer finds that all calls failed before they reached the application code inside the function. Which of the following is a possible reason for this failure?
A. The function resource policy does not allow access from Amazon S3.
B. The function execution role does not allow access from Amazon S3.
C. The function execution role does not allow access to Amazon S3.
D. The IAM user does not have access to Amazon S3.
A developer is implementing an AWS Lambda function that will be invoked when an object is uploaded to Amazon S3. The developer wants to test the Lambda function in a local development machine before publishing the function to a production AWS account. Which solution will meet these requirements with the LEAST operational overhead?
A. Upload an object to Amazon S3 by using the aws s3api put-object CLI command. Wait for the local Lambda invocation from the S3 event.
B. Create a sample JSON text file for a put object S3 event. Invoke the Lambda function locally. Use the aws lambda invoke CLI command with the JSON file and Lambda function name as arguments.
C. Use the sam local start-lambda CLI command lo start Lambda. Use the sam local generate-event s3 put CLI command to create the Lambda test JSON file. Use the sam local invoke CLI command with the JSON file as the argument to invoke the Lambda function.
D. Create a JSON string for the put object S3 event. In the AWS Management Console, use the JSON string to create a test event for the local Lambda function. Perform the test.
A company has an application that provides blog hosting services to its customers. The application includes an Amazon DynamoDB table with a primary key The primary key consists of the customers' UserName as a partition key and the NumberOIBIogs as a sort key. The application stores the TotalReactionsOnBlogs as an attribute on the same DynamoDB table. A developer needs to implement an operation to retrieve the top 10 customers based on the greatest number of reactions on their blogs This operation must not consume the DynamoDB table's existing read capacity. What should the developer do to meet these requirements in the MOST operationally efficient manner?
A. For the existing DynamoDB table, create a new global secondary index (GSI) that has
the UserName as a partition key and the TotalReactionsOnBlogs as a sort key.
B. For the existing DynamoDB table, create a new local secondary index (LSI) that has the UserName as a partition key and the TotalReactionsOnBlogs as a sort key
C. Back up and restore the DynamoDB table to a new DynamoDB table Create a new global secondary index (GSI) that has the UserName as a partition key and the TotalReactionsOnBlogs as a sort key Delete the old DynamoDB table
D. Back up and restore the DynamoDB table to a new DynamoDB table. Create a new local secondary index (LSI) that has the UserName as a partition key and the TotalReactionsOnBlogs as a sort key. Delete the old DynamoDB table.
A company is building a serverless application that uses AWS Lambda. The application includes Lambda functions that are exposed by Amazon API Gateway The functions will use several large third-party libraries, and the build artifacts will exceed 50 MB in size. Which combination of steps should a developer take to prepare and perform the deployment? (Select TWO.)
A. Issue the aws lambda update-function-code CLI command with the -zip-file fileb://myfunction.zip parameter
B. Upload the build artifact to Amazon S3.
C. Issue the aws cloudformation package CLI command.
D. Issue the aws lambda update-function-code CLI command with the -s3-bucket and -s3- key parameters.
E. Issue the aws lambda update-function-code CLI command with a parameter that points to the source code in AWS CodeCommit.
An AWS Lambda function requires read access to an Amazon S3 bucket and requires read/write access to an Amazon DynamoDB table. The correct 1AM policy already exists. What is the MOST secure way to grant the Lambda function access to the S3 bucket and the DynamoDB table?
A. Attach the existing IAM policy to the Lambda function.
B. Create an IAM role for the Lambda function. Attach the existing IAM policy to the role. Attach the role to the Lambda function.
C. Create an IAM user with programmatic access. Attach the existing IAM policy to the user. Add the user access key ID and secret access key as environment variables in the Lambda function.
D. Add the AWS account root user access key ID and secret access key as encrypted environment variables in the Lambda function.
A media company wants to test its web application more frequently. The company deploys the application by using a separate AWS CloudFormation stack for each environment. The same CloudFormation template is deployed to each stack as the application progresses through the development lifecycle. A developer needs to build an automated alert for the quality assurance (QA) team. The developer wants the alert to occur for new deployments in the final pre-production environment. Which solution will moot these requirements?
A. Create an Amazon Simple Notification Service (Amazon SNS) topic. Add a subscription
to notify the QA team. Update the CloudFormation stack options to point to the SNS topic
in the pro-production environment. Most Voted
B. Create an AWS Lambda function that notifies the QA team. Create an Amazon EventBridge rule to invoke the Lambda function on the default event bus. Filter the events on the CloudFormation service and the CloudFormation stack Amazon Resource Name (ARM).
C. Create an Amazon CloudWatch alarm that monitors the metrics from CloudFormation. Filter the metrics on the stack name and the stack status. Configure the alarm to notify the QA team.
D. Create an AWS Lambda function that notifies the QA team. Configure the event source mapping to receive events from CloudFormation. Specify the filtering values to limit invocations to the desired CloudFormation stack.
A developer needs to deploy an application to AWS Elastic Beanstalk for a company. The application consists of a single Docker image. The company's automated continuous integration and continuous delivery (CI/CD) process builds the Docker image and pushes the image to a public Docker registry. How should the developer deploy the application to Elastic Beanstalk?
A. Create a Dockerfile. Configure Elastic Beanstalk to build the application as a Docker image.
B. Create a docker-compose.yml file. Use the Elastic Beanstalk CLI to deploy the application.
C. Create a .zip file that contains the Docker image. Upload the .zip file to Elastic Beanstalk.
D. Create a Dockerfile. Run the Elastic Beanstalk CLI eb local run command in the same directory.
A developer is writing a new web application that will be deployed and managed with AWS Elastic Beanstalk. The application will include an Amazon RDS DB instance. What steps should the developer take to access the RDS DB instance from the code? (Select TWO.)
A. Modify the endpoint name using either the AWS Management Console or AWS CLI
B. Upload the driver to Amazon S3 and reference it in the code
C. Download the appropriate database driver and include it with the application.
D. Construct a connection string using the Elastic Beanstalk environment variables
E. Create a CNAME record referencing database instances ALIAS.
\ developer is designing a serverless application for a game in which users register and log in through a web browser. The application makes requests on behalf of users to a set of AWS Lambda functions that un behind an Amazon API Gateway HTTP API. rhe developer needs to implement a solution to register and log in users on the application's sign-in page. The solution must minimize operational overhead and must minimize ongoing management of user identities. Which solution will meet these requirements?
A. Create Amazon Cognito user pools for external social identity providers. Configure 1AM roles for the identity pools.
B. Program the sign-in page to create users' 1AM groups with the 1AM roles attached to the groups.
C. Create an Amazon RDS for SQL Server DB instance to store the users and manage the permissions to the backend resources in AWS.
D. Configure the sign-in page to register and store the users and their passwords in an Amazon DynamoDB table with an attached 1AM policy.
A developer is creating a new batch application that will run on an Amazon EC2 instance. The application requires read access to an Amazon S3 bucket. The developer needs to follow security best practices to grant S3 read access to the application. Which solution meets these requirements?
A. Add the permissions to an 1AM policy. Attach the policy to a role Attach the role to the EC2 instance profile.
B. Add the permissions inline to an 1AM group. Attach the group to the EC2 instance profile.
C. Add the permissions to an 1AM policy. Attach the policy to a user Attach the user to the EC2 instance profile.
D. Add the permissions to an 1AM policy. Use 1AM web identity federation to access the S3 bucket with the policy
Which solution will meet these requirements?
A. Build the container from the amazon/aws-xray-daemon base image. Use the AWS XRay SDK to instrument the application.
B. Install the Amazon CloudWatch agent on the container image. Use the CloudWatch SDK to publish custom metrics from each of the microservices.
C. Install the AWS X-Ray daemon on each of the ECS instances.
D. Configure AWS CloudTrail data events to capture the traffic between the microservices.
A company that has multiple offices uses an Amazon DynamoDB table to store employee payroll information. Item attributes consist of employee names, office identifiers, and cumulative daily hours worked. The most frequently used query extracts a report of an alphabetical subset of employees for a specific office. Which design of the DynamoDB table primary key will have the MINIMUM performance impact?
A. Partition key on the office identifier and sort key on the employee name
B. Partition key on the employee name and sort key on the office identifier
C. Partition key on the employee name
D. Partition key on the office identifier
A developer is creating a web application that collects highly regulated and confidential user data through a POST request. The web application is served through Amazon CloudFront. User names and phone numbers must be encrypted at the edge and must remain encrypted throughout the entire application stack. What is the MOST secure way to meet these requirements?
A. Enforce Match Viewer with HTTPS Only on CloudFront.
B. Use only the newest TLS security policy on CloudFront.
C. Enforce a signed URL on CloudFront on the front end.
D. Use field-level encryption on CloudFront.