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Amazon DVA-C02 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Troubleshooting and Optimization	18%	- Debug and resolve errors 1. Resolve integration and configuration problems 2. Identify and fix code defects - Optimize application performance 1. Optimize resource usage and costs 2. Improve latency and throughput - Troubleshoot application issues 1. Analyze logs, metrics, and traces 2. Use Amazon CloudWatch, AWS X-Ray for monitoring
Topic 2: Development with AWS Services	32%	- Interact with AWS data services 1. Implement caching and data storage strategies 2. Work with Amazon DynamoDB, Amazon S3 - Integrate AWS services into applications 1. Implement messaging and event-driven workflows 2. Use AWS Lambda, API Gateway, Amazon EventBridge - Write code for applications hosted on AWS 1. Implement architectural patterns 2. Use AWS SDKs and APIs 3. Develop serverless applications
Topic 3: Security	26%	- Secure application data 1. Manage secrets and credentials securely 2. Implement encryption at rest and in transit - Apply security best practices 1. Validate application security configurations 2. Follow AWS Well-Architected Framework security principles - Implement authentication and authorization 1. Use Amazon Cognito for identity management 2. Manage IAM roles, policies, and permissions
Topic 4: Deployment	24%	- Deploy applications on AWS 1. Perform safe updates and rollbacks 2. Deploy to AWS Lambda, Amazon EC2, Elastic Beanstalk - Prepare application artifacts for deployment 1. Package code and dependencies 2. Use infrastructure as code (AWS CloudFormation, AWS SAM) - Implement CI/CD pipelines 1. Automate deployment and testing workflows 2. Use AWS CodePipeline, CodeBuild, CodeDeploy

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최신 AWS Certified Associate DVA-C02 무료샘플문제 (Q244-Q249):

질문 # 244
A company is developing a web application that allows its employees to upload a profile picture to a private Amazon S3 bucket. There is no size limit for the profile pictures, which should be displayed every time an employee logs in. For security reasons, the pictures cannot be publicly accessible.
What is a viable long-term solution for this scenario?

A. Generate a presigned URL when a picture is uploaded. Save the URL in an Amazon DynamoDB table.
Return the URL to the browser when the employee logs in.
B. Encode a picture using base64. Save the base64 string in an Amazon DynamoDB table. Allow the browser to retrieve the string and convert it to a picture.
C. Save the picture's S3 key in an Amazon DynamoDB table. Use a function to generate a presigned URL every time an employee logs in. Return the URL to the browser.
D. Save the picture's S3 key in an Amazon DynamoDB table. Create an Amazon S3 VPC endpoint to allow the employees to download pictures once they log in.

정답：C

설명：
The requirement is to keep profile pictures private in S3 while allowing the browser to display them each time an employee logs in. The standard AWS pattern is to store objects in a private bucket and provide time- limited access through S3 presigned URLs. A presigned URL grants temporary permission to perform a specific operation (such as GET) on a specific object, and it expires automatically after a configured duration.
This prevents public access while still allowing simple browser retrieval.
Option D is the viable long-term solution because it stores only the S3 object key (a stable identifier) in DynamoDB and generates a fresh presigned URL at login time. This is important because presigned URLs expire; storing a presigned URL (option A) would eventually store an expired URL and force extra complexity to refresh records. Generating a new presigned URL when needed ensures the link is always valid and keeps the expiration window tight, which improves security.
Option B is not appropriate for employee browsers in general: a VPC endpoint is for traffic from resources inside a VPC (EC2, Lambda in VPC, etc.). Employee browsers on the public internet cannot use a private VPC endpoint to reach S3. Option C is not viable for "no size limit" images: DynamoDB has strict item size limits, base64 inflates data size, and storing large binary blobs in DynamoDB is inefficient and expensive compared to S3.
Therefore, D best meets the requirement: keep images private in S3, store the S3 key in DynamoDB, and generate a presigned URL on each login to provide secure, temporary access for display.

질문 # 245
A financial company must store original customer records for 10 years for legal reasons. A complete record contains personally identifiable information (PII). According to local regulations, PII is available to only certain people in the company and must not be shared with third parties. The company needs to make the records available to third-party organizations for statistical analysis without sharing the PII.
A developer wants to store the original immutable record in Amazon S3. Depending on who accesses the S3 document, the document should be returned as is or with all the PII removed. The developer has written an AWS Lambda function to remove the PII from the document. The function is named removePii.
What should the developer do so that the company can meet the PII requirements while maintaining only one copy of the document?

A. Create an S3 Object Lambda access point from the S3 console. Select the removePii function. Use S3 Access Points to access the object without PII.
B. Create an S3 access point from the S3 console. Use the access point name to call the GetObjectLegalHold S3 API function. Pass in the removePii function name to access the object without PII.
C. Set up an S3 event notification that invokes the removePii function when an S3 PUT request is made. Call Amazon S3 by using a PUT request to access the object without PII.
D. Set up an S3 event notification that invokes the removePii function when an S3 GET request is made. Call Amazon S3 by using a GET request to access the object without PII.

정답：A

질문 # 246
A company is developing an ecommerce application that uses Amazon API Gateway APIs. The application uses AWS Lambda as a backend. The company needs to test the code in a dedicated, monitored test environment before the company releases the code to the production environment.
When solution will meet these requirements?

A. Use a single stage in API Gateway. Configure a API client to send a query parameter that indicated the environment. Add different code blocks tor afferent environments in the Lambda Junction to match the value of the query parameter.
B. Use multiple stages in API Gateway. Create a Lambda function for each environment. Configure API Gateway stage variables to route traffic to the Lambda function in different environments.
C. Use multiple stages in API Gateway. Create a single Lambda function for all environments. Add different code blocks for different environments in the Lambda function based on Lambda environments variables.
D. Use a single stage in API Gateway. Create a Lambda function for each environment. Configure API clients to send a query parameter that indicates the endowment and the specific lambda function.

정답：B

설명：
The solution that will meet the requirements is to use multiple stages in API Gateway. Create a Lambda function for each environment. Configure API Gateway stage variables to route traffic to the Lambda function in different environments. This way, the company can test the code in a dedicated, monitored test environment before releasing it to the production environment. The company can also use stage variables to specify the Lambda function version or alias for each stage, and avoid hard-coding the Lambda function name in the API Gateway integration. The other options either involve using a single stage in API Gateway, which does not allow testing in different environments, or adding different code blocks for different environments in the Lambda function, which increases complexity and maintenance.
Reference: Set up stage variables for a REST API in API Gateway

질문 # 247
A developer is trying get data from an Amazon DynamoDB table called demoman-table. The developer configured the AWS CLI to use a specific IAM use's credentials and ran the following command.

The command returned errors and no rows were returned.
What is the MOST likely cause of these issues?

A. The developer needs to log a ticket with AWS Support to enable access to the demoman-table
B. The IAM user needs an associated policy with read access to demoman-table
C. The command is incorrect; it should be rewritten to use put-item with a string argument
D. Amazon DynamoOB cannot be accessed from the AWS CLI and needs to called via the REST API

정답：B

설명：
Explanation
This solution will most likely solve the issues because it will grant the IAM user the necessary permission to access the DynamoDB table using the AWS CLI command. The error message indicates that the IAM user does not have sufficient access rights to perform the scan operation on the table. Option A is not optimal because it will change the command to use put-item instead of scan, which will not achieve the desired result of getting data from the table. Option B is not optimal because it will involve contacting AWS Support, which may not be necessary or efficient for this issue. Option C is not optimal because it will state that DynamoDB cannot be accessed from the AWS CLI, which is incorrect as DynamoDB supports AWS CLI commands.
References: AWS CLI for DynamoDB, [IAM Policies for DynamoDB]

질문 # 248
A company has a new application. The company needs to secure sensitive configuration data such as database connection strings, application license codes, and API keys that the application uses to access external resources. The company must track access to the configuration data for auditing purposes. The resources are managed outside the application.
The company is not required to manage rotation of the connection strings, license codes, and API keys in the application. The company must implement a solution to securely store the configuration data and to give the application access to the configuration data. The solution must comply with security best practices.
Which solution will meet these requirements MOST cost-effectively?

A. Store the configuration data in AWS Systems Manager Parameter Store. Grant the application access by using IAM policies.
B. Store the configuration data on an Amazon Elastic Block Store (Amazon EBS) encrypted volume.
Attach the EBS volume to an Amazon EC2 instance to provide the application with access to the data.
C. Store the configuration data in AWS Secrets Manager. Grant the application access by using IAM policies.
D. Store the configuration data in an encrypted file on the source code bundle. Grant the application access by using IAM policies.

정답：A

설명：
https://aws.amazon.com/blogs/mt/the-right-way-to-store-secrets-using-parameter-store/
https://docs.aws.amazon.com/managedservices/latest/userguide/sys-man-param-store.html AWS Systems Manager Parameter Store (AMS SSPS):
AWS Systems Manager Parameter Store provides secure, hierarchical storage for configuration data management and secrets management. You can store data such as passwords, database strings, and license codes as parameter values.

질문 # 249
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