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Amazon DVA-C02 Exam Overview:

Certification Vendor:	Amazon Web Services (AWS)
Exam Name:	AWS Certified Developer – Associate (DVA-C02)
Exam Number:	DVA-C02
Exam Duration:	130 minutes
Passing Score:	720 (scaled score)
Available Languages:	German, Japanese, French, English, Spanish (Latin America), Traditional Chinese, Korean, Portuguese (Brazil), Simplified Chinese
Related Certifications:	AWS Certified DevOps Engineer – Professional AWS Certified Solutions Architect – Associate AWS Certified Cloud Practitioner
Real Exam Qty:	65
Exam Format:	Multiple response, Multiple choice
Certificate Validity Period:	3 years
Exam Price:	USD 150
Recommended Training:	AWS Certified Developer – Associate Exam Guide AWS Skill Builder – Developer Learning Plan
Exam Registration:	AWS Certification Official Registration Pearson VUE AWS Exams
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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DVA-C02 Zertifizierungsantworten, DVA-C02 Prüfungsmaterialien

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Die Amazon DVA-C02 (AWS Certified Developer - Associate) Zertifizierungsprüfung ist ein professionelles Zertifizierungsprogramm von Amazon Web Services (AWS), das speziell für Entwickler entwickelt wurde, die ihre Expertise im Entwurf, der Bereitstellung und der Wartung von Anwendungen auf AWS demonstrieren möchten. Diese Zertifizierung eignet sich ideal für Entwickler, die bereits Erfahrung mit AWS haben und ihre Fähigkeiten potenziellen Arbeitgebern oder Kunden validieren möchten.

Amazon AWS Certified Developer - Associate DVA-C02 Prüfungsfragen mit Lösungen (Q562-Q567):

562. Frage
A developer is writing an application that will retrieve sensitive data from a third-party system. The application will format the data into a PDF file. The PDF file could be more than 1 MB. The application will encrypt the data to disk by using AWS Key Management Service (AWS KMS).
The application will decrypt the file when a user requests to download it. The retrieval and formatting portions of the application are complete.
The developer needs to use the GenerateDataKey API to encrypt the PDF file so that the PDF file can be decrypted later. The developer needs to use an AWS KMS symmetric customer managed key for encryption.
Which solutions will meet these requirements?

A. Write the encrypted key from the GenerateDataKey API to disk for later use. Use the plaintext key from the GenerateDataKey API to encrypt the file by using the KMS Encrypt API.
B. Write the plain text key from the GenerateDataKey API to disk for later use. Use the encrypted key from the GenerateDataKey API to encrypt the file by using the KMS Encrypt API.
C. Write the encrypted key from the GenerateDataKey API to disk for later use. Use the plaintext key from the GenerateDataKey API and a symmetric encryption algorithm to encrypt the file.
D. Write the plain text key from the GenerateDataKey API to disk for later use. Use the encrypted key from the GenerateDataKey API and a symmetric encryption algorithm to encrypt the file.

Antwort: C

563. Frage
A company has deployed infrastructure on AWS. A development team wants to create an AWS Lambda function that will retrieve data from an Amazon Aurora database. The Amazon Aurora database is in a private subnet in company's VPC. The VPC is named VPC1. The data is relational in nature. The Lambda function needs to access the data securely.
Which solution will meet these requirements?

A. Create and launch a Lambda function in a new public subnet that is in a new VPC named VPC2.
Create a peering connection between VPC1 and VPC2.
B. Create the Lambda function. Configure VPC1 access for the function. Attach a security group named SG1 to both the Lambda function and the database. Configure the security group inbound and outbound rules to allow TCP traffic on Port 3306.
C. Create the Lambda function. Configure VPC1 access for the function. Assign a security group named SG1 to the Lambda function. Assign a second security group named SG2 to the database. Add an inbound rule to SG1 to allow TCP traffic from Port 3306.
D. Export the data from the Aurora database to Amazon S3. Create and launch a Lambda function in VPC1. Configure the Lambda function query the data from Amazon S3.

Antwort: B

Begründung:
Explanation
AWS Lambda is a service that lets you run code without provisioning or managing servers. Lambda functions can be configured to access resources in a VPC, such as an Aurora database, by specifying one or more subnets and security groups in the VPC settings of the function. A security group acts as a virtual firewall that controls inbound and outbound traffic for the resources in a VPC. To allow a Lambda function to communicate with an Aurora database, both resources need to be associated with the same security group, and the security group rules need to allow TCP traffic on Port 3306, which is the default port for MySQL databases. Reference: [Configuring a Lambda function to access resources in a VPC]

564. Frage
A developer is building a microservices-based application by using Python on AWS and several AWS services The developer must use AWS X-Ray The developer views the service map by using the console to view the service dependencies. During testing, the developer notices that some services are missing from the service map What can the developer do to ensure that all services appear in the X-Ray service map?

A. Increase the X-Ray service map timeout value in the X-Ray console
B. Enable X-Ray data aggregation in Amazon CloudWatch Logs for all the services that the application uses
C. Instrument the application by using the X-Ray SDK for Python. Install the X-Ray SDK for all the services that the application uses
D. Modify the X-Ray Python agent configuration in each service to increase the sampling rate

Antwort: C

Begründung:
* AWS X-Ray SDK: The primary way to enable X-Ray tracing within applications. The SDK sends data about requests and subsegments to the X-Ray daemon for service map generation.
* Instrumenting All Services: To visualize a complete microservice architecture on the service map, each relevant service must include the X-Ray SDK.

565. Frage
An application that is running on Amazon EC2 instances stores data in an Amazon S3 bucket. All the data must be encrypted in transit.
How can a developer ensure that all traffic to the S3 bucket is encrypted?

A. Create an S3 bucket policy that denies traffic when the value for the aws:SecureTransport condition key is false.
B. Create a private VPC endpoint.
C. Configure the S3 bucket with server-side encryption with AWS KMS managed encryption keys (SSE- KMS).
D. Install certificates on the EC2 instances.

Antwort: A

Begründung:
"Encryption in transit" means the connection between the client (EC2 instances) and Amazon S3 must use TLS/HTTPS, not plain HTTP. The most direct way to enforce this at the bucket level is an S3 bucket policy that denies any request that is not using secure transport. AWS provides the global condition key aws:
SecureTransport, which evaluates to true when a request is made over HTTPS and false when made over HTTP.
By adding an explicit Deny statement conditioned on aws:SecureTransport = false, the bucket rejects any insecure requests regardless of who makes them. This ensures that even if an application is misconfigured (or a user tries to access the bucket over HTTP), S3 will refuse the request. This is a strong enforcement mechanism because explicit denies in IAM policies override allows.
Option C (SSE-KMS) provides encryption at rest, not in transit. It protects objects while stored in S3 but does not force clients to use TLS for transport. Option B (VPC endpoint) can keep traffic on the AWS network path and can be combined with endpoint policies, but it does not inherently guarantee TLS usage unless you also enforce HTTPS. Option A (installing certificates) is not the mechanism for controlling whether the application uses HTTPS to S3; the S3 client uses AWS-managed TLS endpoints, and enforcement should happen through policy.
Therefore, the correct solution is D: create an S3 bucket policy that denies requests when aws:
SecureTransport is false, ensuring all access uses encrypted transport (HTTPS/TLS).

566. Frage
A developer is building an application that uses an Amazon RDS for PostgreSQL database. To meet security requirements, the developer needs to ensure that data is encrypted at rest. The developer must be able to rotate the encryption keys on demand.

A. Use an AWS KMS managed encryption key to encrypt the database.
B. Create a 256-bit AES-GCM encryption key. Store the key in AWS Secrets Manager. Configure an AWS Lambda function to perform key rotation. Use the key to encrypt the database.
C. Create a 256-bit AES-GCM encryption key. Store the key in AWS Secrets Manager, and enable managed rotation. Use the key to encrypt the database.
D. Create a symmetric customer managed AWS KMS key. Use the key to encrypt the database.

Antwort: D

Begründung:
Comprehensive Detailed Explanation with all AWS References
* Why Option B is Correct:A customer-managed AWS Key Management Service (KMS) key allows for encryption at rest and provides the ability to rotate the key on demand. This ensures compliance with security requirements for key management and database encryption.
* RDS integrates natively with AWS KMS, allowing the use of a customer-managed key for encrypting data at rest.
* Key rotation can be managed directly in AWS KMS without needing custom solutions.
* Why Other Options are Incorrect:
* Option A: AWS KMS managed encryption keys (AWS-owned keys) do not support key rotation on demand.
* Option C & D: Storing keys in AWS Secrets Manager with custom rotation is not a recommended approach for database encryption. AWS KMS is designed specifically for secure key management and encryption.
* AWS Documentation References:
* Encrypting Amazon RDS Resources
* AWS Key Management Service (KMS)

567. Frage
......

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