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| Certification Vendor: | Amazon Web Services (AWS) |
|---|---|
| Exam Name: | AWS Certified Developer – Associate (DVA-C02) |
| Exam Number: | DVA-C02 |
| Exam Price: | USD 150 |
| Passing Score: | 720 (scaled score) |
| Exam Format: | Multiple response, Multiple choice |
| Real Exam Qty: | 65 |
| Exam Duration: | 130 minutes |
| Related Certifications: | AWS Certified Solutions Architect – Associate AWS Certified Cloud Practitioner AWS Certified DevOps Engineer – Professional |
| Certificate Validity Period: | 3 years |
| Available Languages: | French, Simplified Chinese, German, English, Portuguese (Brazil), Japanese, Korean, Traditional Chinese, Spanish (Latin America) |
| Recommended Training: | AWS Skill Builder – Developer Learning Plan AWS Certified Developer – Associate Exam Guide |
| Exam Registration: | Pearson VUE AWS Exams AWS Certification Official Registration |
| Sample Questions: | Amazon DVA-C02 Sample Questions |
| Exam Way: | Online proctored exam via Pearson VUE or in-person at authorized testing centers |
| Pre Condition: | No mandatory prerequisites. Recommended: 1+ year of hands-on experience developing and maintaining AWS-based applications. |
| Official Syllabus URL: | https://aws.amazon.com/certification/certified-developer-associate/ |
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Amazon DVA-C02 (AWS Certified Developer - Associate) Exam is designed for developers who want to build and maintain applications on the Amazon Web Services (AWS) platform. AWS Certified Developer - Associate certification validates the candidate's ability to develop, deploy, and debug cloud-based applications using AWS services and tools. DVA-C02 Exam Tests the candidate's knowledge of core AWS services such as Elastic Compute Cloud (EC2), Simple Storage Service (S3), and Relational Database Service (RDS), as well as their ability to use AWS SDKs and APIs to write applications in languages such as Java, Python, and JavaScript.
NEW QUESTION # 888
A company's new mobile app uses Amazon API Gateway. As the development team completes a new release of its APIs, a developer must safely and transparently roll out the API change. What is the SIMPLEST solution for the developer to use for rolling out the new API version to a limited number of users through API Gateway?
Answer: D
Explanation:
The canary release deployment option in Amazon API Gateway allows the developer to safely roll out changes to a small percentage of users by configuring the canarySettings. This is the simplest and most direct way to gradually expose users to the new API version without creating a separate API or complex routing logic.
NEW QUESTION # 889
A company has an application that is hosted on Amazon EC2 instances. The application stores objects in an Amazon S3 bucket and allows users to download objects from the S3 bucket. A developer turns on S3 Block Public Access for the S3 bucket. After this change, users report errors when they attempt to download objects. The developer needs to implement a solution so that only users who are signed in to the application can access objects in the S3 bucket.
Which combination of steps will meet these requirements in the MOST secure way? (Choose two.)
Answer: A,B
NEW QUESTION # 890
A developer has written an application that runs on Amazon EC2 instances. The developer is adding functionality for the application to write objects to an Amazon S3 bucket. Which policy must the developer modify to allow the instances to write these objects?
Answer: D
NEW QUESTION # 891
A developer has created an AWS Lambda function that consumes messages from an Amazon SQS standard queue. The developer notices that the Lambda function processes some messages multiple times.
How should developer resolve this issue MOST cost-effectively?
Answer: A
Explanation:
Amazon SQS standard queues provide at-least-once delivery, which means messages can be delivered more than once. When Lambda is triggered by an SQS standard queue, duplicate delivery can occur due to retries, visibility timeouts, or transient errors. Therefore, "processed multiple times" is expected behavior unless the system implements deduplication or idempotency.
The most cost-effective way within the provided options to reduce duplicate processing is to use an SQS FIFO queue with deduplication. FIFO queues support exactly-once processing semantics within the constraints of the service (by preventing duplicate message delivery within the deduplication interval when a MessageDeduplicationId is used or content-based deduplication is enabled). This directly mitigates duplicate processing without requiring large architectural changes.
Option B (DLQ) is important for handling poison messages, but it does not prevent duplicates in normal processing; it only captures messages that fail repeatedly.
Option C (concurrency = 1) reduces parallelism but does not eliminate duplicates; the same message can still be delivered again if the visibility timeout expires or retries occur.
Option D is a major redesign and not cost-effective for simply addressing duplicate SQS message processing.
# Note: In real production systems, the best practice is to make processing idempotent (so duplicates do no harm). But among the choices, FIFO + deduplication is the most direct and cost-effective fix.
Therefore, switch to an SQS FIFO queue and use deduplication.
NEW QUESTION # 892
A developer has deployed an AWS Lambda function that is subscribed to an Amazon Simple Notification Service (Amazon SNS) topic. The developer must implement a solution to add a record of each Lambda function invocation to an Amazon Simple Queue Service (Amazon SQS) queue.
Which solution will meet this requirement?
Answer: A
NEW QUESTION # 893
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