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Amazon DVA-C02 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Deployment24%- Infrastructure as code
  • 1. AWS CloudFormation templates
    - CI/CD and deployment strategies
    • 1. AWS CodePipeline workflows
      • 2. AWS CodeBuild and CodeDeploy usage
        Topic 2: Troubleshooting and Optimization18%- Monitoring and logging
        • 1. Amazon CloudWatch metrics and logs
          - Performance optimization
          • 1. Application performance tuning
            • 2. Fault tolerance and resilience patterns
              Topic 3: Development with AWS Services32%- Application development and integration
              • 1. API Gateway and REST APIs
                • 2. Event-driven architectures with SNS/SQS
                  - AWS core services development
                  • 1. Amazon DynamoDB integration patterns
                    • 2. Amazon S3 usage in applications
                      • 3. AWS Lambda functions development
                        Topic 4: Security26%- Application authentication and authorization
                        • 1. Cognito user authentication
                          • 2. IAM roles and policies
                            - Data security
                            • 1. Secure API access patterns
                              • 2. Encryption using AWS KMS

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                                DVA-C02下載 & DVA-C02證照信息

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                                最新的 AWS Certified Associate DVA-C02 免費考試真題 (Q26-Q31):

                                問題 #26
                                A developer is building an application that gives users the ability to view bank account from multiple sources in a single dashboard. The developer has automated the process to retrieve API credentials for these sources. The process invokes an AWS Lambda function that is associated with an AWS CloudFormation cotton resource.
                                The developer wants a solution that will store the API credentials with minimal operational overhead.
                                When solution will meet these requirements?

                                答案：D

                                解題說明：
                                The solution that will meet the requirements is to use the AWS SDK ssm PutParameter operation in the Lambda function from the existing custom resource to store the credentials as a parameter. Set the parameter value to reference the new credentials. Set the parameter type to SecureString. This way, the developer can store the API credentials with minimal operational overhead, as AWS Systems Manager Parameter Store provides secure and scalable storage for configuration data. The SecureString parameter type encrypts the parameter value with AWS Key Management Service (AWS KMS). The other options either involve adding additional resources to the CloudFormation template, which increases complexity and cost, or do not encrypt the parameter value, which reduces security.


                                問題 #27
                                A developer needs approval from a product owner before the developer can deploy code for an application to production. The developer uses AWS CodePipeline to deploy the application. The developer configures an Amazon Simple Notification Service (Amazon SNS) topic to send notifications to the product owner.
                                Which solution is the MOST operationally efficient way for the developer to receive approval from the product owner?

                                答案：A


                                問題 #28
                                Users of a web-based music application are experiencing latency issues on one of the application's most popular pages. A developer identifies that the issue is caused by the slow load time of specific widgets that rank and sort various songs and albums.
                                The developer needs to ensure that the widgets load more quickly by using built-in, in-memory ranking and sorting techniques. The developer must ensure that the data remains up to date.
                                Which solution will meet these requirements with the LEAST latency?

                                答案：D

                                解題說明：
                                Comprehensive and Detailed 250 to 300 words of Explanation (AWS-doc-aligned):
                                To minimize widget latency for ranking and sorting, the best fit is Amazon ElastiCache for Redis OSS because Redis provides built-in in-memory data structures specifically suited for ranking use cases, such as Sorted Sets (ZSETs). Sorted sets maintain members in order by score, which enables fast retrieval of "top N" items and efficient re-ranking without repeatedly querying the primary database and sorting at the application tier. Memcached, by contrast, is a simpler key-value cache and does not provide comparable native ranking
                                /sorting data structures.
                                To ensure data remains up to date, a write-through caching strategy is preferred. With write-through, updates are written to the cache at the same time as the system of record, so the cache reflects the latest values immediately after writes. This avoids stale rankings that can occur with lazy-loading (cache-aside), where the cache is only populated or refreshed on reads and can serve older data until expiration or explicit invalidation.
                                Combining Redis's native sorted/ranking structures with write-through updates yields the least latency because the page widgets can fetch pre-ranked/pre-sorted results directly from Redis memory with minimal computation, while still maintaining freshness as new plays, likes, or album changes occur. Operationally, this pattern reduces database load, avoids repeated sorting work in the application, and provides consistently fast reads for a high-traffic page.


                                問題 #29
                                A developer is writing unit tests tor a new application that will be deployed on AWS. The developer wants to validate all pull requests with unit tests and merge the code with the main branch only when all tests pass The developer stores the code in AWS CodeCommit and sets up AWS CodeBuild to run the unit tests. The developer creates an AWS Lambda function to start the CodeBuild task. The developer needs to identify the CodeCommit events in an Amazon EventBridge event that can invoke the Lambda function when a pull request is created or updated.
                                Which CodeCommit event will meet these requirements?

                                答案：A


                                問題 #30
                                A company has an application that runs across multiple AWS Regions. The application is experiencing performance issues at irregular intervals. A developer must use AWS X-Ray to implement distributed tracing for the application to troubleshoot the root cause of the performance issues.
                                What should the developer do to meet this requirement?

                                答案：A

                                解題說明：
                                Explanation
                                AWS X-Ray automatically adds Region annotation for AWS services that are integrated with X-Ray. This annotation indicates the AWS Region where the service is running. The developer can use this annotation to filter and group traces by Region and identify any performance issues related to cross-Region calls. The developer can also add Region annotation for user-defined services by using the X-Ray SDK. This option enables the developer to implement distributed tracing for the application that runs across multiple AWS Regions. References
                                * AWS X-Ray Annotations
                                * AWS X-Ray Concepts


                                問題 #31
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