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Amazon AWS Certified Developer - Associate Sample Questions (Q115-Q120):

NEW QUESTION # 115
A developer creates a static website for their department The developer deploys the static assets for the website to an Amazon S3 bucket and serves the assets with Amazon CloudFront The developer uses origin access control (OAC) on the CloudFront distribution to access the S3 bucket The developer notices users can access the root URL and specific pages but cannot access directories without specifying a file name. For example, /products/index.html works, but /products returns an error The developer needs to enable accessing directories without specifying a file name without exposing the S3 bucket publicly.
Which solution will meet these requirements'?

A. Create a custom error response on the CloudFront distribution with the HTTP error code set to the HTTP 404 Not Found response code and the response page path to /index html Set the HTTP response code to the HTTP 200 OK response code
B. Create a CloudFront function that examines the request URL and appends index.html when directories are being accessed Add the function as a viewer request CloudFront function to the CloudFront distribution's behavior.
C. Update the CloudFront distribution's settings to index.html as the default root object is set
D. Update the Amazon S3 bucket settings and enable static website hosting. Specify index html as the Index document Update the S3 bucket policy to enable access. Update the CloudFront distribution's origin to use the S3 website endpoint

Answer: D

Explanation:
* Problem:Directory access without file names fails.
* S3 Static Website Hosting:
* Configuring S3 as a static website enables automatic serving of index.html for directory requests.
* Bucket policies ensure correct access permissions.
* Updating the CloudFront origin simplifies routing.
* Avoiding Public Exposure:The S3 website endpoint allows CloudFront to access content without making the bucket public.

NEW QUESTION # 116
An 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 finsihed, 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. Create additional AWS SAM templates for each testing and staging environment. Write a custom shell script that uses the sam deploy command and the --template-file flag to deploy updates to the environments.
B. Use the existing AWS SAM template. Add additional parameters to configure specific attributes for the serverless function and database table resources that are in each environment. Deploy updates to the testing and staging environments by using the sam deploy command.
C. Add a configuration file in TOML format to group configuration entries to every environment. Add a table for each testing and staging environment. Deploy updates to the environments by using the sam deploy command and the --config-env flag that corresponds to the each environment.
D. Create one AWS SAM configuration file that has default parameters. Perform updates to the testing and staging environments by using the -parameter-overrides flag in the AWS SAM CLI and the parameters that the updates will override.

Answer: C

NEW QUESTION # 117
A company needs to distribute firmware updates to its customers around the world.
Which service will allow easy and secure control of the access to the downloads at the lowest cost?

A. Use Amazon API Gateway and AWS Lambda to control access to an S3 bucket.
B. Create a dedicated Amazon CloudFront Distribution for each customer.
C. Use Amazon CloudFront with signed URLs for Amazon S3.
D. Use Amazon CloudFront with AWS Lambda@Edge.

Answer: C

Explanation:
This solution allows easy and secure control of access to the downloads at the lowest cost because it uses a content delivery network (CDN) that can cache and distribute firmware updates to customers around the world, and uses a mechanism that can restrict access to specific files or versions. Amazon CloudFront is a CDN that can improve performance, availability, and security of web applications by delivering content from edge locations closer to customers. Amazon S3 is a storage service that can store firmware updates in buckets and objects. Signed URLs are URLs that include additional information, such as an expiration date and time, that give users temporary access to specific objects in S3 buckets. The developer can use CloudFront to serve firmware updates from S3 buckets and use signed URLs to control who can download them and for how long. Creating a dedicated CloudFront distribution for each customer will incur unnecessary costs and complexity. Using Amazon CloudFront with AWS Lambda@Edge will require additional programming overhead to implement custom logic at the edge locations. Using Amazon API Gateway and AWS Lambda to control access to an S3 bucket will also require additional programming overhead and may not provide optimal performance or availability.

NEW QUESTION # 118
A developer is creating an AWS Lambda function that needs network access to private resources in a VPC.

A. Configure a VPC endpoint connection for the Lambda function. Set up the VPC endpoint to route traffic through a NAT gateway.
B. Attach the Lambda function to the VPC through private subnets. Create a security group that allows network access to the private resources. Associate the security group with the Lambda function.
C. Configure an AWS PrivateLink endpoint for the private resources. Configure the Lambda function to reference the PrivateLink endpoint.
D. Configure the Lambda function to route traffic through a VPN connection. Create a security group that allows network access to the private resources. Associate the security group with the Lambda function.

Answer: B

Explanation:
Comprehensive Detailed Step by Step Explanation with All AWS Developer Reference:
When you need to provide an AWS Lambda function access to private resources in a VPC, the most common and straightforward approach is to attach the Lambda function to a VPC via private subnets. Once the Lambda function is associated with the VPC, you need to configure appropriate security groups to control the access to the private resources.
Lambda with VPC Access: Lambda functions can be attached to private subnets in a VPC, allowing them to access resources like RDS, EC2, or internal services within that VPC.
Security Groups: A security group acts as a virtual firewall for the Lambda function, ensuring that it can access only the necessary resources and ports in the VPC.
Alternatives:
Option B involves routing traffic through a VPN, which adds unnecessary complexity and operational overhead compared to simply attaching the Lambda to the VPC.
Option C requires configuring a VPC endpoint and a NAT gateway, which can be complex and costly.
Option D refers to AWS PrivateLink, which is used to access services over private connections, but it's unnecessary in this scenario unless you need a cross-VPC connection.
Reference:
Lambda functions in a VPC

NEW QUESTION # 119
A developer is updating an Amazon API Gateway REST API to have a mock endpoint. The developer wants to update the integration request mapping template so the endpoint will respond to mock integration requests with specific HTTP status codes based on various conditions.

A. { if( $input.params('integration') == "mock" ) "statusCode": 404 else "statusCode": 500 end }
B. { if( $input.path("integration") ) "statusCode": 200 else "statusCode":404 end }
C. { if( $input.params('scope') == "internal" ) "statusCode": 200 else "statusCode": 500 end }
D. { if( $context.integration.status ) "statusCode": 200 else "statusCode": 500 end }

Answer: D

Explanation:
Comprehensive Detailed Step by Step Explanation with All AWS Developer References:
In this scenario, the developer is configuring a mock integration in API Gateway. The integration request mapping template allows you to map the incoming request data to a format that the API expects. For mock integration, it's common to return specific HTTP status codes based on the conditions.
* Using $context.integration.status: The $context.integration.status variable refers to the status of the API Gateway integration, which is useful for generating responses based on the condition. OptionD correctly uses this variable to determine the HTTP status code, returning 200 for a successful mock request or 500 for a failure.
* Alternatives:
* Options A, B, and C do not use the correct context variables for handling mock integrations.
These options would not return the correct status codes based on the actual integration status.

NEW QUESTION # 120
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