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Amazon DVA-C02 exam covers a wide range of topics related to AWS development. DVA-C02 exam tests the candidate's knowledge of AWS core services such as EC2, S3, RDS, DynamoDB, and Lambda, along with other services such as API Gateway, CloudFront, CloudFormation, and CloudWatch. DVA-C02 Exam also covers topics such as AWS security, deployment, and troubleshooting. To pass the exam, candidates must demonstrate proficiency in all of these areas.

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Amazon DVA-C02 is an official certification exam provided by Amazon Web Services (AWS) that validates one's technical knowledge and expertise in developing and deploying applications on the AWS platform. DVA-C02 exam is designed for developers who have at least one year of hands-on experience with AWS services and are familiar with the core AWS services, as well as the best practices for developing, deploying, and debugging applications on AWS.

The DVA-C02 Exam covers a wide range of topics related to AWS development, including developing and debugging AWS services, deploying AWS applications, and implementing security and compliance measures. DVA-C02 exam also tests candidates' ability to use AWS services to create scalable and resilient applications, as well as their knowledge of AWS best practices.

Amazon AWS Certified Developer - Associate Sample Questions (Q289-Q294):

NEW QUESTION # 289
An organization is using Amazon CloudFront to ensure that its users experience low-latency access to its web application. The organization has identified a need to encrypt all traffic between users and CloudFront, and all traffic between CloudFront and the web application.
How can these requirements be met? (Select TWO)

A. Set the Viewer Protocol Policy to "HTTPS Only" or Redirect HTTP to HTTPS"
B. Use AWS KMS t0 encrypt traffic between cloudFront and the web application.
C. Enable the CloudFront option Restrict Viewer Access.
D. Set the Origin Protocol Policy to "HTTPS Only".
E. Set the Origin's HTTP Port to 443.

Answer: A,D

Explanation:
Explanation
This solution will meet the requirements by ensuring that all traffic between users and CloudFront, and all traffic between CloudFront and the web application, are encrypted using HTTPS protocol. The Origin Protocol Policy determines how CloudFront communicates with the origin server (the web application), and setting it to "HTTPS Only" will force CloudFront to use HTTPS for every request to the origin server. The Viewer Protocol Policy determines how CloudFront responds to HTTP or HTTPS requests from users, and setting it to "HTTPS Only" or "Redirect HTTP to HTTPS" will force CloudFront to use HTTPS for every response to users. Option A is not optimal because it will use AWS KMS to encrypt traffic between CloudFront and the web application, which is not necessary or supported by CloudFront. Option C is not optimal because it will set the origin's HTTP port to 443, which is incorrect as port 443 is used for HTTPS protocol, not HTTP protocol. Option E is not optimal because it will enable the CloudFront option Restrict Viewer Access, which is used for controlling access to private content using signed URLs or signed cookies, not for encrypting traffic.
References: [Using HTTPS with CloudFront], [Restricting Access to Amazon S3 Content by Using an Origin Access Identity]

NEW QUESTION # 290
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 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.
B. 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
C. Update the CloudFront distribution's settings to index.html as the default root object is set
D. 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

Answer: B

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 # 291
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. Create an 1AM user with programmatic access Attach the existing 1AM policy to the user. Add the user access key ID and secret access key as environment variables in the Lambda function.
B. Create an 1AM role for the Lambda function Attach the existing 1AM policy to the role Attach the role to the Lambda function
C. Add the AWS account root user access key ID and secret access key as encrypted environment variables in the Lambda function
D. Attach the existing 1AM policy to the Lambda function.

Answer: B

Explanation:
Principle of Least Privilege: Granting specific permissions through an IAM role is more secure than directly attaching policies to a function or using root user credentials.
IAM Roles for Lambda: Designed to provide temporary credentials to Lambda functions, enhancing security.
Reusability: The existing IAM policy ensures the correct S3 and DynamoDB access is granted.
Reference:
IAM Roles for Lambda Documentation: https://docs.aws.amazon.com/lambda/latest/dg/lambda-intro-execution-role.html IAM Best Practices: https://docs.aws.amazon.com/IAM/latest/UserGuide/best-practices.html

NEW QUESTION # 292
A developer is creating an application that will be deployed on IoT devices. The application will send data to a RESTful API that is deployed as an AWS Lambda function. The application will assign each API request a unique identifier. The volume of API requests from the application can randomly increase at any given time of day.
During periods of request throttling, the application might need to retry requests. The API must be able to handle duplicate requests without inconsistencies or data loss.
Which solution will meet these requirements?

A. Create an Amazon DynamoDB table. Store the unique identifier for each request in the table. Modify the Lambda function to return a client error response when the function receives a duplicate request.
B. Create an Amazon DynamoDB table. Store the unique identifier for each request in the table. Modify the Lambda function to check the table for the identifier before processing the request.
C. Create an Amazon ElastiCache for Memcached instance. Store the unique identifier for each request in the cache. Modify the Lambda function to check the cache for the identifier before processing the request.
D. Create an Amazon RDS for MySQL DB instance. Store the unique identifier for each request in a database table. Modify the Lambda function to check the table for the identifier before processing the request.

Answer: B

Explanation:
Explanation
Amazon DynamoDB is a fully managed NoSQL database service that can store and retrieve any amount of data with high availability and performance. DynamoDB can handle concurrent requests from multiple IoT devices without throttling or data loss. To prevent duplicate requests from causing inconsistencies or data loss, the Lambda function can use DynamoDB conditional writes to check if the unique identifier for each request already exists in the table before processing the request. If the identifier exists, the function can skip or abort the request; otherwise, it can process the request and store the identifier in the table.
Reference: Using conditional writes

NEW QUESTION # 293
A developer wants to debug an application by searching and filtering log data. The application logs are stored in Amazon CloudWatch Logs. The developer creates a new metric filter to count exceptions in the application logs. However, no results are returned from the logs.
What is the reason that no filtered results are being returned?

A. CloudWatch Logs only publishes metric data for events that happen after the filter is created.
B. A setup of the Amazon CloudWatch interface VPC endpoint is required for filtering the CloudWatch Logs in the VPC.
C. Metric data points for logs groups can be filtered only after they are exported to an Amazon S3 bucket.
D. The log group for CloudWatch Logs should be first streamed to Amazon OpenSearch Service before metric filtering returns the results.

Answer: A

NEW QUESTION # 294
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Latest DVA-C02 Braindumps, Study DVA-C02 Plan

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Amazon AWS Certified Developer - Associate Sample Questions (Q289-Q294):