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A developer is writing unit tests tor a new application that will be deployed on AWS. The developer wants to validate all pull requests with unit tests and merge the code with the main branch only when all tests pass The developer stores the code in AWS CodeCommit and sets up AWS CodeBuild to run the unit tests. The developer creates an AWS Lambda function to start the CodeBuild task. The developer needs to identify the CodeCommit events in an Amazon EventBridge event that can invoke the Lambda function when a pull request is created or updated. Which CodeCommit event will meet these requirements?
A. Option A
B. Option B
C. Option C
D. Option D
ANSWER : C
A company runs continuous integration/continuous delivery (CI/CD) pipelines for its application on AWS CodePipeline. A developer must write unit tests and run them as part of the pipelines before staging the artifacts for testing. How should the developer incorporate unit tests as part of CI/CD pipelines?
A. Create a separate CodePipeline pipeline to run unit tests.
B. Update the AWS CodeBuild build specification to include a phase for running unit tests.
C. Install the AWS CodeDeploy agent on an Amazon EC2 instance to run unit tests.
D. Create a testing branch in a git repository for the pipelines to run unit tests.
ANSWER : B
A company is using an Amazon API Gateway REST API endpoint as a webhook to publish events from an on-premises source control management (SCM) system to Amazon EventBridge. The company has configured an EventBridge rule to listen for the events and to control application deployment in a central AWS account. The company needs to receive the same events across multiple receiver AWS accounts. How can a developer meet these requirements without changing the configuration of the SCM system?
A. Deploy the API Gateway REST API to all the required AWS accounts. Use the same
custom domain name for all the gateway endpoints so that a single SCM webhook can be
used for all events from all accounts.
B. Deploy the API Gateway REST API to all the receiver AWS accounts. Create as many SCM webhooks as the number of AWS accounts.
C. Grant permission to the central AWS account for EventBridge to access the receiver AWS accounts. Add an EventBridge event bus on the receiver AWS accounts as the targets to the existing EventBridge rule.
D. Convert the API Gateway type from REST API to HTTP API.
ANSWER : C
A company is planning to deploy an application on AWS behind an Elastic Load Balancing (ELB) load balancer. The application uses an HTTP/HTTPS listener and must access the client IP addresses. Which load-balancing solution meets these requirements?
A. Use an Application Load Balancer and the X-Forwarded-For headers.
B. Use a Network Load Balancer (NLB). Enable proxy protocol support on the NLB and the target application.
C. Use an Application Load Balancer. Register the targets by the instance ID.
D. Use a Network Load Balancer and the X-Forwarded-For headers.
ANSWER : B
A company wants to use AWS AppConfig to gradually deploy a new feature to 15% of users to test the feature before a full deployment. Which solution will meet this requirement with the LEAST operational overhead?
A. Set up a custom script within the application to randomly select 15% of users. Assign a
flag for the new feature to the selected users.
B. Create separate AWS AppConfig feature flags for both groups of users. Configure the flags to target 15% of users.
C. Create an AWS AppConfig feature flag. Define a variant for the new feature, and create a rule to target 15% of users.
D. Use AWS AppConfig to create a feature flag without variants. Implement a custom traffic splitting mechanism in the application code.
ANSWER : C
A developer needs to set up an API to provide access to an application and its resources. The developer has a TLS certificate. The developer must have the ability to change the default base URL of the API to a custom domain name. The API users are distributed globally. The solution must minimize API latency.
A. Create an Amazon CloudFront distribution that uses an AWS Lambda@Edge function to
process API requests. Import the TLS certificate into AWS Certificate Manager and CloudFront. Add the custom domain name as an alias resource record set that is for the
CloudFront distribution.
B. Create an Amazon API Gateway REST API. Use the private endpoint type. Import the TLS certificate into AWS Certificate Manager. Create a custom domain name for the REST API. Route traffic to the custom domain name. Disable the default endpoint for the REST API.
C. Create an Amazon API Gateway REST API. Use the edge-optimized endpoint type. Import the TLS certificate into AWS Certificate Manager. Create a custom domain name for the REST API. Route traffic to the custom domain name. Disable the default endpoint for the REST API.
D. Create an Amazon CloudFront distribution that uses CloudFront Functions to process API requests. Import the TLS certificate into AWS Certificate Manager and CloudFront. Add the custom domain name as an alias resource record set that is for the CloudFront distribution.
ANSWER : C
A company uses AWS X-Ray to monitor a serverless application. The components of the application have different request rates. The user interactions and transactions are important to trace, but they are low in volume. The background processes such as application health checks, polling, and connection maintenance generate high volumes of read-only requests. Currently, the default X-Ray sampling rules are universal for all requests. Only the first request per second and some additional requests are recorded. This setup is not helping the company review the requests based on service or request type. A developer must configure rules to trace requests based on service or request properties. The developer must trace the user interactions and transactions without wasting effort recording minor background tasks. Which solution will meet these requirements?
A. Disable sampling for high-volume read-only requests. Sample at a lower rate for all
requests that handle user interactions or transactions.
B. Disable sampling and trace all requests for requests that handle user interactions or transactions. Sample high-volume read-only requests at a higher rate.
C. Disable sampling and trace all requests for requests that handle user interactions or transactions. Sample high-volume read-only requests at a lower rate.
D. Disable sampling for high-volume read-only requests. Sample at a higher rate for all requests that handle user interactions or transactions.
ANSWER : C
A developer is creating a microservices application that runs across multiple compute environments. The application must securely access secrets that are stored in AWS Secrets Manager with minimal network latency. The developer wants a solution that reduces the number of direct calls to Secrets Manager and simplifies secrets management across environments. Which solution will meet these requirements with the LEAST operational overhead?
A. Create a custom script that retrieves secrets directly from Secrets Manager and caches
the secrets in a local database for each compute environment.
B. Install the Secrets Manager Agent in each compute environment. Configure the agent to cache secrets locally. Securely retrieve the secrets from Secrets Manager as needed.
C. Implement lazy loading logic in the application to fetch secrets directly from Secrets Manager and to cache the secrets in Redis.
D. Store the secrets in an Amazon S3 bucket. Retrieve and load the secrets as environment variables during application startup for each compute environment.
ANSWER : B
A developer is creating an application that uses an Amazon DynamoDB table. The developer needs to develop code that reads all records that were added to the table during the previous day. creates HTML reports, and pushes the reports into third-party storage. The item size varies from 1 KB to 4 KB, and the index structure is defined with the date. The developer needs to minimize the read capacity that the application requires from the DynamoDB table. Which DynamoDB API operation should the developer use in the code to meet these requirements?
A. Query
B. Scan
C. BatchGetltem
D. Getltem
ANSWER : A
A company runs an application on AWS The application uses an AWS Lambda function that is configured with an Amazon Simple Queue Service (Amazon SQS) queue called high priority queue as the event source A developer is updating the Lambda function with another SQS queue called low priority queue as the event source The Lambda function must always read up to 10 simultaneous messages from the high priority queue before processing messages from low priority queue. The Lambda function must be limited to 100 simultaneous invocations. Which solution will meet these requirements'?
A. Set the event source mapping batch size to 10 for the high priority queue and to 90 for
the low priority queue
B. Set the delivery delay to 0 seconds for the high priority queue and to 10 seconds for the low priority queue
C. Set the event source mapping maximum concurrency to 10 for the high priority queue and to 90 for the low priority queue
D. Set the event source mapping batch window to 10 for the high priority queue and to 90 for the low priority queue
ANSWER : C
A company has many microservices that are comprised of AWS Lambda functions. Multiple teams within the company split ownership of the microservices. An application reads configuration values from environment variables that are contained in the Lambda functions. During a security audit, the company discovers that some of the environment variables contain sensitive information. The company's security policy requires each team to have full control over the rotation of AWS KMS keys that the team uses for its respective microservices.
A. Create AWS managed keys for all Lambda functions. Use the new AWS managed keys
to encrypt the environment variables. Add kms:Decrypt permissions to the Lambda function
execution roles.
B. Create customer managed keys for all Lambda functions. Use the new customer managed keys to encrypt the environment variables. Add kms:Decrypt permission to the Lambda function execution roles.
C. Create customer managed keys for all Lambda functions. Use the new customer managed keys to encrypt the environment variables. Add kms:CreateGrant permission and kms:Encrypt permission to the Lambda function execution roles.
D. Create AWS managed keys for all Lambda functions. Use the new AWS managed keys to encrypt the environment variables. Add kms:CreateGrant permission and kms:Encrypt permission to the Lambda function execution roles.
ANSWER : B
A company's application has an AWS Lambda function that processes messages from loT 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.
ANSWER : C
A developer previously deployed an AWS Lambda function as a .zip package. The developer needs to deploy the Lambda function as a container.
A. Create an Amazon ECR repository in the same AWS Region as the Lambda function.
Package the Lambda function into a container image. Build the image and upload it to the
Amazon ECR repository. Update the existing Lambda function configuration to specify the
repository URI and container image tag.
B. Create an AWS SAM template that defines the Lambda function and its resources as code. Include a container image in the template, and store the container image in an Amazon S3 bucket. Deploy the AWS SAM template. Specify the S3 bucket URI.
C. Create an AWS CloudFormation template that defines the Lambda function and its resources as code. Include a container image in the template, and store the image in an Amazon S3 bucket. Deploy the CloudFormation template. Specify the S3 bucket URI.
D. Create an Amazon ECR repository in the same AWS Region as the Lambda function. Build the image and upload it to the Amazon ECR repository. Update the existing Lambda function to use the new image by specifying the repository URI.
ANSWER : A
A company has a serverless application that uses Amazon API Gateway backed by AWS Lambda proxy integration. The company is developing several backend APIs. The company needs a landing page to provide an overview of navigation to the APIs. A developer creates a new /LandingPage resource and a new GET method that uses mock integration. What should the developer do next to meet these requirements?
A. Configure the integration request mapping template with Content-Type of text/html and
statusCode of 200. Configure the integration response mapping template with Content-
Type of application/json. In the integration response mapping template, include the
LandingPage HTML code that references the APIs.
B. Configure the Integration request mapping template with Content-Type of application/json. In the integration request mapping template, include the LandingPage HMTL code that references the APIs. Configure the integration response mapping template with Content-Type of text/html and statusCode of 200.
C. Configure the integration request mapping template with Content-Type of application/json and statusCode of 200. Configure the integration response mapping template with Content-Type of text/html. In the integration response mapping template, include the LandingPage HTML code that references the APIs.
D. Configure the integration request mapping template with Content-Type of text/html. In the integration request mapping template, include the LandingPage HTML code that references the APIs. Configure the integration response mapping template with Content- Type of application/json and statusCode of 200.
ANSWER : C
A company is developing an application that will be accessed through the Amazon API Gateway REST API. Registered users should be the only ones who can access certain resources of this API. The token being used should expire automatically and needs to be refreshed periodically. How can a developer meet these requirements?
A. Create an Amazon Cognito identity pool, configure the Amazon Cognito Authorizer in
API Gateway, and use the temporary credentials generated by the identity pool.
B. Create and maintain a database record for each user with a corresponding token and use an AWS Lambda authorizer in API Gateway.
C. Create an Amazon Cognito user pool, configure the Cognito Authorizer in API Gateway, and use the identity or access token.
D. Create an 1AM user for each API user, attach an invoke permissions policy to the API. and use an I AM authorizer in API Gateway.
ANSWER : C
A company is providing read access to objects in an Amazon S3 bucket for different customers. The company uses 1AM permissions to restrict access to the S3 bucket. The customers can access only their own files. Due to a regulation requirement, the company needs to enforce encryption in transit for interactions with Amazon S3. Which solution will meet these requirements?
A. Add a bucket policy to the S3 bucket to deny S3 actions when the aws:SecureTransport
condition is equal to false.
B. Add a bucket policy to the S3 bucket to deny S3 actions when the s3:x-amz-acl condition is equal to public-read.
C. Add an 1AM policy to the 1AM users to enforce the usage of the AWS SDK.
D. Add an 1AM policy to the 1AM users that allows S3 actions when the s3:x-amz-acl condition is equal to bucket-owner-read.
ANSWER : A
A social media company is designing a platform that allows users to upload data, which is stored in Amazon S3. Users can upload data encrypted with a public key. The company wants to ensure that only the company can decrypt the uploaded content using an asymmetric encryption key. The data must always be encrypted in transit and at rest. Options:
A. Use server-side encryption with Amazon S3 managed keys (SSE-S3) to encrypt the
data.
B. Use server-side encryption with customer-provided encryption keys (SSE-C) to encrypt the data.
C. Use client-side encryption with a data key to encrypt the data.
D. Use client-side encryption with a customer-managed encryption key to encrypt the data.
ANSWER : D
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