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Amazon DVA-C02 Exam Overview:

Certification Vendor:	Amazon Web Services (AWS)
Exam Name:	AWS Certified Developer - Associate
Exam Number:	DVA-C02
Exam Duration:	130 minutes
Passing Score:	720 (scaled score of 100–1,000)
Exam Format:	Multiple response, Multiple choice
Related Certifications:	AWS Certified DevOps Engineer - Professional AWS Certified Cloud Practitioner
Certificate Validity Period:	3 years
Available Languages:	Japanese, Spanish (Latin America), Simplified Chinese, Korean, Portuguese (Brazil), English
Exam Price:	150 USD
Real Exam Qty:	65 (50 scored, 15 unscored)
Sample Questions:	Amazon DVA-C02 Sample Questions
Exam Way:	Pearson VUE testing center or online proctored exam
Pre Condition:	Recommended 1 or more years of hands-on experience in developing and maintaining applications using AWS services. Proficiency in at least one high-level programming language.
Official Syllabus URL:	https://aws.amazon.com/certification/certified-developer-associate/

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The AWS Certified Developer - Associate certification exam covers a wide range of topics, including AWS core services, security, databases, and deployment and management. Candidates are required to have a strong understanding of programming languages such as Python, Java, and Ruby, as well as experience with AWS services such as EC2, S3, and Lambda.

The AWS Certified Developer - Associate certification is a valuable credential for developers who want to advance their career in the cloud computing industry. AWS Certified Developer - Associate certification demonstrates their ability to use AWS services to develop scalable, reliable, and secure applications. AWS Certified Developer - Associate certification also demonstrates their understanding of the best practices for deploying and maintaining applications on AWS.

Amazon AWS Certified Developer - Associate Sample Questions (Q558-Q563):

NEW QUESTION # 558
A company has an ecommerce web application that uses an on-premises MySQL database as a data store. The company migrates the on-premises MySQL database to Amazon RDS for MySQL.
A developer needs to configure the application's access to the RDS for MySQL database. The developer's solution must not use long term credentials.
Which solution will meet these requirements?

A. Store the MySQL credentials as secrets in AWS Secrets Manager. Create an IAM role that has the minimum required permissions to retrieve the secrets. Assign the role to the application.
B. Enable IAM database authentication on the RDS for MySQL DB instance. Create an IAM role that has the minimum required permissions. Assign the role to the application.
C. Store the MySQL credentials as SecureString parameters in AWS Systems Manager Parameter Store. Create an IAM role that has the minimum required permissions to retrieve the parameters.Assign the role to the application.
D. Configure the MySQL credentials as environment variables that are available at runtime for the application.

Answer: A

NEW QUESTION # 559
A developer has an application that makes batch requests directly to Amazon DynamoDB by using the BatchGetItem low-level API operation. The responses frequently return values in the UnprocessedKeys element.
Which actions should the developer take to increase the resiliency of the application when the batch response includes values in UnprocessedKeys? (Choose two.)

A. Increase the provisioned write capacity of the DynamoDB tables that the operation accesses.
B. Increase the provisioned read capacity of the DynamoDB tables that the operation accesses.
C. Retry the batch operation immediately.
D. Retry the batch operation with exponential backoff and randomized delay.
E. Update the application to use an AWS software development kit (AWS SDK) to make the requests.

Answer: D,E

Explanation:
Explanation
The UnprocessedKeys element indicates that the BatchGetItem operation did not process all of the requested items in the current response. This can happen if the response size limit is exceeded or if the table's provisioned throughput is exceeded. To handle this situation, the developer should retry the batch operation with exponential backoff and randomized delay to avoid throttling errors and reduce the load on the table.
The developer should also use an AWS SDK to make the requests, as the SDKs automatically retry requests that return UnprocessedKeys.
References:
[BatchGetItem - Amazon DynamoDB]
[Working with Queries and Scans - Amazon DynamoDB]
[Best Practices for Handling DynamoDB Throttling Errors]

NEW QUESTION # 560
A developer is creating a mobile application that will not require users to log in.
What is the MOST efficient method to grant users access to AWS resources'?

A. Create credentials using AWS KMS and apply these credentials to users when using the application.
B. Use an identity provider to securely authenticate with the application.
C. Create an AWS Lambda function to create an 1AM user when a user accesses the application.
D. Use Amazon Cognito to associate unauthenticated users with an IAM role that has limited access to resources.

Answer: D

Explanation:
Explanation
This solution is the most efficient method to grant users access to AWS resources without requiring them to log in. Amazon Cognito is a service that provides user sign-up, sign-in, and access control for web and mobile applications. Amazon Cognito identity pools support both authenticated and unauthenticated users.
Unauthenticated users receive access to your AWS resources even if they aren't logged in with any of your identity providers (IdPs). You can use Amazon Cognito to associate unauthenticated users with an IAM role that has limited access to resources, such as Amazon S3 buckets or DynamoDB tables. This degree of access is useful to display content to users before they log in or to allow them to perform certain actions without signing up. Using an identity provider to securely authenticate with the application will require users to log in, which does not meet the requirement. Creating an AWS Lambda function to create an IAM user when a user accesses the application will incur unnecessary costs and complexity, and may pose security risks if not implemented properly. Creating credentials using AWS KMS and applying them to users when using the application will also incur unnecessary costs and complexity, and may not provide fine-grained access control for resources.

NEW QUESTION # 561
A company must encrypt sensitive data that the company will store in Amazon S3. A developer must retain total control over the company's AWS Key Management Service (AWS KMS) key and the company's data keys. The company currently uses an on-premises hardware security module (HSM) solution. The company wants to move its key management onto AWS.
Which solution will meet these requirements?

A. Implement server-side encryption with AWS KMS managed keys (SSE-KMS). Use AWS CloudHSM to generate the KMS key and data keys to use with AWS KMS.
B. Implement server-side encryption with AWS KMS managed keys (SSE-KMS). Use the AWS KMS custom key store feature to manage the data keys. Then read or write objects to Amazon S3 as normal.
C. Implement server-side encryption with customer-provided encryption keys (SSE-C). Use AWS CloudHSM to generate the KMS key and manage the data keys that the company will use to read and write objects to Amazon S3.
D. Implement server-side encryption with Amazon S3 managed encryption keys (SSE-S3). Use AWS CloudHSM to generate the KMS key and manage the data keys that the company will use to read and write objects to Amazon S3.

Answer: B

Explanation:
https://docs.aws.amazon.com/cloudhsm/latest/userguide/best-practices.html Q: Can other AWS services use CloudHSM to store and manage keys?
AWS services integrate with AWS Key Management Service, which in turn is integrated with AWS CloudHSM through the KMS custom key store feature. If you want to use the server-side encryption offered by many AWS services (such as EBS, S3, or Amazon RDS), you can do so by configuring a custom key store in AWS KMS.

NEW QUESTION # 562
When a developer tries to run an AWS Code Build project, it raises an error because the length of all environment variables exceeds the limit for the combined maximum of characters.
What is the recommended solution?

A. Update the settings for the build project to use an Amazon S3 bucket for large numbers of environment variables
B. Add the export LC-_ALL" on _ US, tuft" command to the pre _ build section to ensure POSIX Localization.
C. Use Amazon Cognate to store key-value pairs for large numbers of environment variables
D. Use AWS Systems Manager Parameter Store to store large numbers ot environment variables

Answer: D

NEW QUESTION # 563
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