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[General] DVA-C02 Latest Exam | Valid DVA-C02 Exam Pdf

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【General】 DVA-C02 Latest Exam | Valid DVA-C02 Exam Pdf

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Amazon DVA-C02 certification exam covers a wide range of topics such as AWS core services, AWS development and deployment, security, and troubleshooting. Candidates are expected to have a good understanding of these topics to pass the exam. DVA-C02 Exam is designed to test the candidate's ability to develop, deploy, and maintain applications on the AWS platform.
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Amazon AWS Certified Developer - Associate Sample Questions (Q94-Q99):NEW QUESTION # 94
A social media application is experiencing high volumes of new user requests after a recent marketing campaign. The application is served by an Amazon RDS for MySQL instance. A solutions architect examines the database performance and notices high CPU usage and many
"too many connections" errors that lead to failed requests on the database. The solutions architect needs to address the failed requests.
Which solution will meet this requirement?
  • A. Deploy an RDS Proxy. Configure the application to use the RDS Proxy.
  • B. Deploy an Amazon DynamoDB Accelerator (DAX) cluster. Configure the application to use the DAX cluster.
  • C. Deploy an Amazon ElastiCache (Redis OSS) cluster. Configure the application to use the ElastiCache cluster.
  • D. Migrate the database to an Amazon RDS for PostgreSQL instance.
Answer: A
Explanation:
RDS Proxy manages database connections efficiently, reducing overhead on the RDS instance and mitigating "too many connections" errors.

NEW QUESTION # 95
A developer is testing an AWS Lambda function that has an event source of an Amazon Simple Queue Service (Amazon SQS) queue. The developer notices that some of the messages the Lambda function processes re-appear in the queue while the messages are being processed.
The developer must correct this behavior.
Which solution will meet this requirement?
  • A. Increase the memory allocation of the Lambda function.
  • B. Increase the batch size in the event source mapping.
  • C. Increase the visibility timeout of the SQS queue.
  • D. Increase the timeout of the Lambda function.
Answer: C

NEW QUESTION # 96
A company runs an application on AWS The application stores data in an Amazon DynamoDB table Some queries are taking a long time to run These slow queries involve an attribute that is not the table's partition key or sort key The amount of data that the application stores in the DynamoDB table is expected to increase significantly. A developer must increase the performance of the queries.
Which solution will meet these requirements'?
  • A. Perform a parallel scan operation by issuing individual scan requests in the parameters specify the segment for the scan requests and the total number of segments for the parallel scan.
  • B. Turn on read capacity auto scaling for the DynamoDB table. Increase the maximum read capacity units (RCUs).
  • C. Create a global secondary index (GSI). Set query attribute to be the partition key of the index
  • D. Increase the page size for each request by setting the Limit parameter to be higher than the default value Configure the application to retry any request that exceeds the provisioned throughput.
Answer: C
Explanation:
* Global Secondary Index (GSI): GSIs enable alternative query patterns on a DynamoDB table by using different partition and sort keys.
* Addressing Query Bottleneck: By making the slow-query attribute the GSI's partition key, you optimize queries on that attribute.
* Scalability: GSIs automatically scale to handle increasing data volumes.
References:
* Amazon DynamoDB Global Secondary Indexes: https://docs.aws.amazon.com/amazondynamodb
/latest/developerguide/GSI.html

NEW QUESTION # 97
A company has a web application that runs on Amazon EC2 instances with a custom Amazon Machine Image (AMI) The company uses AWS CloudFormation to provision the application The application runs in the us-east-1 Region, and the company needs to deploy the application to the us-west-1 Region An attempt to create the AWS CloudFormation stack in us-west-1 fails. An error message states that the AMI ID does not exist. A developer must resolve this error with a solution that uses the least amount of operational overhead Which solution meets these requirements?
  • A. Build the custom AMI in us-west-1 Create a new AWS CloudFormation template to launch the stack in us-west-1 with the new AMI ID
  • B. Manually deploy the application outside AWS CloudFormation in us-west-1.
  • C. Change the AWS CloudFormation templates for us-east-1 and us-west-1 to use an AWS AMI. Relaunch the stack for both Regions.
  • D. Copy the custom AMI from us-east-1 to us-west-1. Update the AWS CloudFormation template for us-west-1 to refer to AMI ID for the copied AMI Relaunch the stack
Answer: D
Explanation:
Explanation
https://aws.amazon.com/blogs/aws/ec2-ami-copy-between-regions/

NEW QUESTION # 98
A developer is building an application that stores sensitive user data. The application includes an Amazon CloudFront distribution and multiple AWS Lambda functions that handle user requests.
The user requests contain over 20 data fields. Each application transaction contains sensitive data that must be encrypted. Only specific parts of the application need to have the ability to decrypt the data.
Which solution will meet these requirements?
  • A. Configure the CloudFront distribution to use WebSockets by forwarding all viewer request headers to the origin. Create an asymmetric AWS KMS key. Configure the CloudFront distribution to use field-level encryption. Use the AWS KMS key.
  • B. Integrate AWS WAF with CloudFront to protect the sensitive data. Use a Lambda function and self-managed keys to perform the encryption and decryption processes.
  • C. Associate the CloudFront distribution with a Lambda@Edge function. Configure the function to perform field-level asymmetric encryption by using a user-defined RSA public key that is stored in AWS Key Management Service (AWS KMS).
  • D. Configure the cache behavior in the CloudFront distribution to require HTTPS for communication between viewers and CloudFront. Configure GoudFront to require users to access the files by using either signed URLs or signed cookies.
Answer: A
Explanation:
CloudFront supports field-level encryption, which allows you to encrypt specific parts of the request data (such as sensitive user data fields) before it is sent to the origin. By configuring CloudFront to use field-level encryption and integrating it with AWS KMS, you can securely encrypt sensitive data using KMS-managed keys and ensure that only specific parts of your application (such as your origin or Lambda functions) can decrypt the data. This solution is designed for handling sensitive data in a way that provides both security and flexibility, with KMS providing secure key management and encryption.

NEW QUESTION # 99
......
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