AUTHORITATIVE DVA-C02–100% FREE RELIABLE EXAM REGISTRATION | DVA-C02 FREE EXAM

Authoritative DVA-C02–100% Free Reliable Exam Registration | DVA-C02 Free Exam

Authoritative DVA-C02–100% Free Reliable Exam Registration | DVA-C02 Free Exam

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Amazon DVA-C02 (AWS Certified Developer - Associate) Certification Exam is an industry-recognized certification for developers who have expertise in building and deploying applications on the Amazon Web Services (AWS) platform. AWS Certified Developer - Associate certification exam validates the candidate's ability to design, develop, and maintain applications on AWS, and it is intended for professionals who have a minimum of one year of experience in developing and maintaining AWS-based applications.

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Amazon AWS Certified Developer - Associate Sample Questions (Q138-Q143):

NEW QUESTION # 138
A developer accesses AWS CodeCommit over SSH. The SSH keys configured to access AWS CodeCommit are tied to a user with the following permissions:

The developer needs to create/delete branches
Which specific IAM permissions need to be added based on the principle of least privilege?

  • A. Option A
  • B. Option C
  • C. Option B
  • D. Option D

Answer: A

Explanation:
This solution allows the developer to create and delete branches in AWS CodeCommit by granting the codecommit:CreateBranch and codecommit:DeleteBranch permissions. These are the minimum permissions required for this task, following the principle of least privilege. Option B grants too many permissions, such as codecommit:Put*, which allows the developer to create, update, or delete any resource in CodeCommit.
Option C grants too few permissions, such as codecommit:Update*, which does not allow the developer to create or delete branches. Option D grants all permissions, such as codecommit:*, which is not secure or recommended.


NEW QUESTION # 139
A developer is creating an AWS Lambda function that needs network access to private resources in a VPC.

  • A. Configure an AWS PrivateLink endpoint for the private resources. Configure the Lambda function to reference the PrivateLink endpoint.
  • 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 a VPC endpoint connection for the Lambda function. Set up the VPC endpoint to route traffic through a NAT gateway.
  • 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 References: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.


NEW QUESTION # 140
A company hosts a client-side web application for one of its subsidiaries on Amazon S3. The web application can be accessed through Amazon CloudFront from https://www.example.com. After a successful rollout, the company wants to host three more client-side web applications for its remaining subsidiaries on three separate S3 buckets.
To achieve this goal, a developer moves all the common JavaScript files and web fonts to a central S3 bucket that serves the web applications. However, during testing, the developer notices that the browser blocks the JavaScript files and web fonts.
What should the developer do to prevent the browser from blocking the JavaScript files and web fonts?

  • A. Create a bucket policy that allows access to the central S3 bucket. Attach the bucket policy to the central S3 bucket.
  • B. Create a Content-MD5 header that provides a message integrity check for the central S3 bucket. Insert the Content-MD5 header for each web application request.
  • C. Create four access points that allow access to the central S3 bucket. Assign an access point to each web application bucket.
  • D. Create a cross-origin resource sharing (CORS) configuration that allows access to the central S3 bucket.
    Add the CORS configuration to the central S3 bucket.

Answer: D

Explanation:
Explanation
This is a frequent trouble. Web applications cannot access the resources in other domains by default, except some exceptions. You must configure CORS on the resources to be accessed.
https://docs.aws.amazon.com/AmazonS3/latest/userguide/cors.html


NEW QUESTION # 141
A developer is migrating some features from a legacy monolithic application to use AWS Lambda functions instead. The application currently stores data in an Amazon Aurora DB cluster that runs in private subnets in a VPC. The AWS account has one VPC deployed. The Lambda functions and the DB cluster are deployed in the same AWS Region in the same AWS account.
The developer needs to ensure that the Lambda functions can securely access the DB cluster without crossing the public internet.
Which solution will meet these requirements?

  • A. Configure the DB cluster's public access setting to Yes.
  • B. Configure an Amazon RDS database proxy for the Lambda functions.
  • C. Configure the VPC, subnets, and a security group for the Lambda functions.
  • D. Configure a NAT gateway and a security group for the Lambda functions.

Answer: C

Explanation:
This solution will meet the requirements by allowing the Lambda functions to access the DB cluster securely within the same VPC without crossing the public internet. The developer can configure a VPC endpoint for RDS in a private subnet and assign it to the Lambda functions. The developer can also configure a security group forthe Lambda functions that allows inbound traffic from the DB cluster on port 3306 (MySQL).
Option A is not optimal because it will expose the DB cluster to public access, which may compromise its security and data integrity. Option B is not optimal because it will introduce additional latency and complexity to use an RDS database proxy for accessing the DB cluster from Lambda functions within the same VPC. Option C is not optimal because it will require additional costs and configuration to use a NAT gateway for accessing resources in private subnets from Lambda functions.


NEW QUESTION # 142
A company runs a payment application on Amazon EC2 instances behind an Application Load Balance The EC2 instances run in an Auto Scaling group across multiple Availability Zones The application needs to retrieve application secrets during the application startup and export the secrets as environment variables These secrets must be encrypted at rest and need to be rotated every month.
Which solution will meet these requirements with the LEAST development effort?

  • A. Save the secrets as strings in AWS Systems Manager Parameter Store and use the default AWS Key Management Service (AWS KMS) key Configure an Amazon EC2 user data script to retrieve the secrets during the startup and export as environment variables Configure an AWS Lambda function to rotate the secrets in Parameter Store every month.
  • B. Save the secrets as base64 encoded environment variables in the application properties. Retrieve the secrets during the application startup. Reference the secrets in the application code. Write a script to rotate the secrets saved as environment variables.
  • C. Store the secrets in AWS Secrets Manager Provision a new customer master key Use the key to encrypt the secrets Enable automatic rotation Configure an Amazon EC2 user data script to programmatically retrieve the secrets during the startup and export as environment variables
  • D. Save the secrets in a text file and store the text file in Amazon S3 Provision a customer managed key Use the key for secret encryption in Amazon S3 Read the contents of the text file and read the export as environment variables Configure S3 Object Lambda to rotate the text file every month

Answer: C

Explanation:
AWS Secrets Manager: Built for managing secrets, providing encryption, automatic rotation, and access control.
Customer Master Key (CMK): Provides an extra layer of control over encryption through AWS KMS.
Automatic Rotation: Enhances security by regularly changing the secret.
User Data Script: Allows secrets retrieval at instance startup and sets them as environment variables for seamless use within the application.
Reference:
AWS Secrets Manager Documentation: https://docs.aws.amazon.com/secretsmanager/ AWS KMS Documentation: https://docs.aws.amazon.com/kms/ User Data for EC2 Instances: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/user-data.html


NEW QUESTION # 143
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