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| Certification Vendor: | Amazon Web Services (AWS) |
|---|---|
| Exam Name: | AWS Certified Developer - Associate |
| Exam Number: | DVA-C02 |
| Exam Format: | Multiple choice, Multiple response |
| Real Exam Qty: | 65 (50 scored, 15 unscored) |
| Exam Price: | 150 USD |
| Related Certifications: | AWS Certified DevOps Engineer - Professional AWS Certified Cloud Practitioner |
| Available Languages: | Korean, Japanese, Simplified Chinese, Spanish (Latin America), Portuguese (Brazil), English |
| Passing Score: | 720 (scaled score of 100–1,000) |
| Exam Duration: | 130 minutes |
| Certificate Validity Period: | 3 years |
| Sample Questions: | Amazon DVA-C02 Sample Questions |
| Exam Way: | Pearson VUE testing center or online proctored exam |
| Pre Condition: | Recommended 1 or more years of hands-on experience in developing and maintaining applications using AWS services. Proficiency in at least one high-level programming language. |
| Official Syllabus URL: | https://aws.amazon.com/certification/certified-developer-associate/ |
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The DVA-C02 exam is an important certification for developers looking to validate their skills and knowledge in AWS development. It covers a wide range of topics related to AWS development, including AWS core services, developer tools, and programming languages commonly used in AWS development. By passing the DVA-C02 Exam, candidates can demonstrate their ability to design, develop, and deploy cloud-based applications using AWS services and best practices, making them a valuable asset to any organization.
NEW QUESTION # 373
A company has a serverless application that uses Amazon API Gateway and AWS Lambda functions to expose a RESTful API. The company uses a continuous integration and continuous delivery (CI/CD) workflow to deploy the application to multiple environments. The company wants to implement automated integration tests after deployment.
A developer needs to set up the necessary infrastructure and processes to automate the deployment and integration tests for the serverless application.
Answer: B
Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
Option C: Use AWS CodePipeline for CI/CD Workflow:
AWS CodePipeline automates the entire CI/CD pipeline, including build, deploy, and test stages. This minimizes manual effort and integrates well with AWS services.
API Gateway Stages: Represent different environments, such as dev, test, and prod, allowing isolated deployment and testing.
AWS CloudFormation Templates: Ensure that the infrastructure for Lambda and API Gateway is consistent across environments.
AWS CodeBuild for Automated Tests: Validates the deployments in each stage, ensuring integration and functionality are tested post-deployment.
Why Other Options Are Incorrect:
Option A and B: While using AWS SAM or CloudFormation for infrastructure management is valid, these options lack the fully automated CI/CD pipeline provided by CodePipeline.
Option D: Manually invoking Lambda functions using the AWS CLI introduces operational overhead and lacks the automation provided by CodePipeline.
References:
AWS CodePipeline Documentation
API Gateway Stages for CI/CD
NEW QUESTION # 374
A developer is leveraging a Border Gateway Protocol (BGP)-based AWS VPN connection to connect from on-premises to Amazon EC2 instances in the developer's account. The developer is able to access an EC2 instance in subnet A, but is unable to access an EC2 instance in subnet B in the same VPC. Which logs can the developer use to verify whether the traffic is reaching subnet B?
Answer: A
Explanation:
VPC Flow Logs capture network traffic information going to and from network interfaces in a VPC.
They are the best tool to verify if traffic is reaching subnet B and how it is being handled (accepted or rejected), helping to diagnose connectivity issues at the subnet or instance level.
NEW QUESTION # 375
A developer created a Node.js-based AWS Lambda function by using a container image of an AWS OS-only base image. There is a new security patch for Node.js that must be patched to the new Lambda function.
Which solution will meet this requirement?
Answer: C
Explanation:
* Why Option D is Correct:When using a container-based AWS Lambda function, you are responsible for updating the base image for runtime patches. Rebuilding the container with the latest Node.js patch version ensures the function is updated with the required security patches. Publishing a new version of the Lambda function makes the updated image available for use.
* Why Other Options are Incorrect:
* Option A: The runtime update mode applies to functions using AWS-managed runtimes, not container-based runtimes.
* Option B: Redeploying the same version of the Lambda function does not apply the security patch.
* Option C: Rebuilding with the AWS OS base image does not guarantee that the latest Node.js patch version is included.
* AWS Documentation References:
* Lambda Function Container Images
* Node.js Updates in AWS Lambda
NEW QUESTION # 376
A developer is debugging an issue with an application that is based on an AWS Lambda function. The Lambda function intermittently fails during a 1-hour window. The developer needs to investigate the root cause of the intermittent failures. The application sends logs to an Amazon CloudWatch Logs log group. The developer must be able to collect logs that relate to Lambda function failures. The developer must capture the dates and times at which the failures occurred. Which solution will meet these requirements in the MOST operationally efficient way?
Answer: D
Explanation:
The correct answer is B because Amazon CloudWatch Logs Insights is the AWS-native tool for interactively searching, filtering, and analyzing log data that is already stored in CloudWatch Logs. In this case, the developer needs to investigate intermittent Lambda failures within a specific 1-hour period , identify logs related to failures, and capture the timestamps of those failures. Logs Insights is purpose-built for exactly this kind of operational troubleshooting.
AWS documentation describes Logs Insights as a fully integrated log analytics capability that can query log groups by time range and pattern. The developer can run a query that filters for error-related log messages, extracts timestamp fields, and sorts the results to find exactly when failures occurred. This is highly efficient because it does not require exporting logs, writing custom parsing scripts, or manually browsing through streams.
Option A is possible but not the most operationally efficient. Browsing logs through the CLI is slower and more manual, especially for intermittent failures. Option C is inefficient because downloading logs to a local machine adds unnecessary steps and operational overhead. Option D can work for large-scale analytics, but exporting to S3 and querying with Athena is more complex than needed for logs that are already in CloudWatch Logs.
Therefore, the best solution is to use CloudWatch Logs Insights to query the Lambda log group for failure patterns and timestamps. This provides fast, targeted, and operationally efficient troubleshooting directly within AWS.
NEW QUESTION # 377
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?
Answer: B
Explanation:
By adding a second cache behavior with unrestricted viewer access to the login page's path pattern, unauthenticated users will be allowed to access the login page. At the same time, the default cache behavior's settings remain unchanged, and private content remains secure because it still requires signed cookies for access.
If you create additional cache behaviors, the default cache behavior is always the last to be processed.
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/distribution-web-values- specify.html#DownloadDistValuesCacheBehavior
NEW QUESTION # 378
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