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DVA-C02考試涵蓋廣泛的主題，包括AWS核心服務、數據庫技術、應用部署和安全性。該考試由65道多選和多響應問題組成，考生有130分鐘完成。要通過考試，考生必須在可能的1,000分中獲得720分或更高的分數。通過考試後，考生將獲得AWS認證開發人員-副理證書，有效期為三年。此認證證明個人具備在AWS平台上開發和部署應用程序所需的技能和知識，可向雇主和客戶展示。

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Amazon DVA-C02是AWS認證開發人員-副手考試的最新版本。這項認證針對有開發和維護基於AWS應用程式經驗的專業人員。該考試驗證他們在AWS上設計、開發、部署和維護應用程式的技能和知識。考試的更新版本反映了最新的AWS服務和功能，包括AWS Lambda、Amazon API Gateway、Amazon DynamoDB和Amazon SQS。

最新的 AWS Certified Associate DVA-C02 免費考試真題 (Q241-Q246):

問題 #241
A developer is creating an application that must be able to generate API responses without backend integrations. Multiple internal teams need to work with the API while the application is still in development.
Which solution will meet these requirements with the LEAST operational overhead?

答案：B

解題說明：
Comprehensive Detailed and Lengthy Step-by-Step Explanation with All AWS Developer References:
1. Understanding the Use Case:
The API needs to:
Generate responses without backend integrations: This indicates the use of mock responses for testing.
Be used by multiple internal teams during development.
Minimize operational overhead.
2. Key Features of Amazon API Gateway:
REST APIs: Fully managed API Gateway option that supports advanced capabilities like mock integrations, request/response transformation, and more.
HTTP APIs: Lightweight option for building APIs quickly. It supports fewer features but has lower operational complexity and cost.
Mock Integration: Allows API Gateway to return pre-defined responses without requiring backend integration.
3. Explanation of the Options:
Option A:"Create an Amazon API Gateway REST API. Set up a proxy resource that has the HTTP proxy integration type."A proxy integration requires a backend service for handling requests. This does not meet the requirement of "no backend integrations." Option B:"Create an Amazon API Gateway HTTP API. Provision a VPC link, and set up a private integration on the API to connect to a VPC."This requires setting up a VPC and provisioning resources, which increases operational overhead and is unnecessary for this use case.
Option C:"Create an Amazon API Gateway HTTP API. Enable mock integration on the method of the API resource."While HTTP APIs can enable mock integrations, they have limited support for advanced features compared to REST APIs, such as detailed request/response customization. REST APIs are better suited for development environments requiring mock responses.
Option D:"Create an Amazon API Gateway REST API. Enable mock integration on the method of the API resource."This is the correct answer. REST APIs with mock integration allow defining pre-configured responses directly within API Gateway, making them ideal for scenarios where backend services are unavailable. It provides flexibility for testing while minimizing operational overhead.
4. Implementation Steps:
To enable mock integration with REST API:
Create a REST API in API Gateway:
Open the API Gateway Console.
Choose Create API > REST API.
Define the API Resource and Methods:
Add a resource and method (e.g., GET or POST).
Set Up Mock Integration:
Select the method, and in the Integration Type, choose Mock Integration.
Configure the Mock Response:
Define a 200 OK response with the desired response body and headers.
Deploy the API:
Deploy the API to a stage (e.g., dev) to make it accessible.
5. Why REST API Over HTTP API?
REST APIs support detailed request/response transformations and robust mock integration features, which are ideal for development and testing scenarios.
While HTTP APIs offer lower cost and simplicity, they lack some advanced features required for fine-tuned mock integrations.
References:
Amazon API Gateway REST API Features
Mock Integration in API Gateway
Comparison of REST and HTTP APIs in API Gateway
AWS API Gateway Pricing


問題 #242
A company is building a compute-intensive application that will run on a fleet of Amazon EC2 instances. The application uses attached Amazon Elastic Block Store (Amazon EBS) volumes for storing data. The Amazon EBS volumes will be created at time of initial deployment. The application will process sensitive information. All of the data must be encrypted. The solution should not impact the application's performance.
Which solution will meet these requirements?

答案：A


問題 #243
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?

答案：C

解題說明：
NATGateway is for when we want Lambda to access the public when it is in a private VPC.
https://docs.aws.amazon.com/lambda/latest/dg/foundation-networking.html


問題 #244
A developer is writing an application, which stores data in an Amazon DynamoDB table. The developer wants to query the DynamoDB table by using the partition key and a different sort key value. The developer needs the latest data with all recent write operations.
How should the developer write the DynamoDB query?

答案：D


問題 #245
A new application must run a security service in an isolated virtual machine (VM). The application must be physically close to the VM to reduce data transmission latency. Also, the application and the security service must be placed on the same compute resource to streamline the deployment.
Which compute host will provide the LOWEST latency between the application and the VM?

答案：A

解題說明：
An Amazon EC2 instance with AWS Nitro Enclaves provides a secure, isolated VM (enclave) that runs on the same physical host as the parent EC2 instance. This setup ensures the lowest possible latency between the application and the security service due to shared compute resources and local communication via vsock.


問題 #246
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