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| Certification Vendor: | Amazon Web Services (AWS) |
|---|---|
| Exam Name: | AWS Certified Developer - Associate |
| Exam Number: | DVA-C02 |
| Real Exam Qty: | 65 (50 scored, 15 unscored) |
| Available Languages: | Spanish (Latin America), Portuguese (Brazil), Simplified Chinese, Korean, Japanese, English |
| Exam Duration: | 130 minutes |
| Exam Format: | Multiple response, Multiple choice |
| Passing Score: | 720 (scaled score of 100–1,000) |
| Related Certifications: | AWS Certified DevOps Engineer - Professional AWS Certified Cloud Practitioner |
| Certificate Validity Period: | 3 years |
| Exam Price: | 150 USD |
| 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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Die DVA-C02-Prüfung deckt eine breite Palette von AWS-Diensten ab, einschließlich Rechen-, Speicher-, Datenbanken, Netzwerk, Sicherheit und Anwendungsintegration. Von den Kandidaten wird erwartet, dass sie ein solides Verständnis der AWS-Dienste und Best Practices für das Entwerfen und Bereitstellen von Anwendungen haben, die widerstandsfähig, skalierbar und kostengünstig sind. Die Prüfung besteht aus 65 Fragen der Multiple-Choice- und Multiple-Response-Fragen, und die Kandidaten haben 130 Minuten Zeit, um sie zu vervollständigen.
27. Frage
A developer is writing an application that processes data delivered into an Amazon S3 bucket. The data is delivered approximately 10 times per day, and the developer expects the processing to complete in less than
1 minute on average.
How can the developer deploy and invoke the application with the LOWEST cost and LOWEST latency?
Antwort: D
Begründung:
AWS Lambda combined with Amazon S3 event notifications provides the most cost-effective and lowest- latency solution for processing objects uploaded to S3. AWS documentation states that S3 event notifications can invoke Lambda functions immediately after object creation, eliminating delays associated with polling or scheduled execution.
Because the data arrives only about 10 times per day and processing completes quickly, Lambda is ideal due to its pay-per-invocation pricing model. There is no need to maintain always-on infrastructure, which significantly reduces cost compared to running EC2 instances. The developer pays only for execution time and requests.
Using CloudWatch alarms (Option A) or scheduled events (Option C) introduces unnecessary latency and complexity. These approaches either delay processing or require periodic checks rather than reacting instantly to object uploads. Polling from EC2 (Option D) is the most expensive and least efficient option because it requires continuously running compute resources.
AWS best practices for event-driven architectures explicitly recommend S3 event notifications # Lambda for near-real-time processing of uploaded data. This approach minimizes operational overhead, achieves near- zero idle cost, and provides the fastest possible response to new data.
Therefore, invoking a Lambda function directly through an S3 event notification is the optimal solution.
28. Frage
A developer deploys an Amazon SNS topic and creates a subscription for an Amazon SQS queue. An AWS Lambda function processes messages in the SQS queue. The Lambda function deserializes each message body and processes the resulting object.
When the developer tests the solution, a JSON object is published to the SNS topic. However, the Lambda function returns an error when the function attempts to deserialize the message body. The error states that the message is not valid JSON.
The developer must resolve the error.
Which solution will meet this requirement?
Antwort: C
Begründung:
Enabling raw message delivery on the SNS subscription to the SQS queue ensures that the message is delivered without SNS JSON wrapping. This allows the Lambda function to receive and deserialize the original JSON object correctly.
29. Frage
A company uses a custom root certificate authority certificate chain (Root CA Cert) that is 10 KB in size generate SSL certificates for its on-premises HTTPS endpoints. One of the company's cloud based applications has hundreds of AWS Lambda functions that pull date from these endpoints. A developer updated the trust store of the Lambda execution environment to use the Root CA Cert when the Lambda execution environment is initialized. The developer bundled the Root CA Cert as a text file in the Lambdas deployment bundle.
After 3 months of development the root CA Cert is no longer valid and must be updated. The developer needs a more efficient solution to update the Root CA Cert for all deployed Lambda functions. The solution must not include rebuilding or updating all Lambda functions that use the Root CA Cert. The solution must also work for alldevelopment, testing and production environment. Each environment is managed in a separate AWS account.
When combination of steps Would the developer take to meet these environments MOST cost-effectively?
(Select TWO)
Antwort: D,E
Begründung:
This solution will meet the requirements by storing the Root CA Cert as a Secure String parameter in AWS Systems Manager Parameter Store, which is a secure and scalable service for storing and managing configuration data and secrets. The resource-based policy will allow IAM users in different AWS accounts and environments to access the parameter without requiring cross-account roles or permissions. The Lambda code will be refactored to load the Root CA Cert from the parameter store and modify the runtime trust store outside the Lambda function handler, which will improve performance and reduce latency by avoiding repeated calls to Parameter Store and trust store modifications for each invocation of the Lambda function.
Option A is not optimal because it will use AWS Secrets Manager instead of AWS Systems Manager Parameter Store, which will incur additional costs and complexity for storing and managing a non-secret configuration data such as Root CA Cert. Option C is not optimal because it will deactivate the application secrets and monitor the application error logs temporarily, which will cause application downtime and potential data loss. Option D is not optimal because it will modify the runtime trust store inside the Lambda function handler, which will degrade performance and increase latency by repeating unnecessary operations for each invocation of the Lambda function.
30. Frage
A developer is working on an ecommerce application that stores data in an Amazon RDS for MySQL cluster. The developer needs to implement a caching layer for the application to retrieve information about the most viewed products.
Which solution will meet these requirements?
Antwort: C
31. Frage
A development team uses AWS CodeBuild as part of a CI/CD pipeline. The project includes hundreds of unit and integration tests, and total build time continues to increase. The team wants faster feedback and lower overall testing duration without managing additional infrastructure.
Which solution will meet these requirements with the LEAST operational overhead?
Antwort: A
Begründung:
AWS CodeBuild supports parallel test execution through batch builds and multiple compute environments.
This feature allows a single CodeBuild project to divide test workloads across multiple isolated environments that run concurrently. Each environment executes a subset of the test suite, significantly reducing total build time.
AWS documentation emphasizes using native CodeBuild capabilities to minimize operational complexity.
Parallel execution eliminates the need to manually manage infrastructure, test orchestration logic, or EC2 fleets. CodeBuild automatically provisions and terminates build environments, scales as needed, and integrates seamlessly with CI/CD pipelines.
Options A and D require manual coordination and infrastructure management, increasing operational overhead. Option C does not address the performance problem.
Therefore, using CodeBuild's parallel compute environments is the most efficient and AWS-recommended approach.
32. Frage
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