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Amazon DVA-C02 certification is a valuable credential for developers who want to demonstrate their expertise in AWS development. AWS Certified Developer - Associate certification can help professionals advance their careers by demonstrating their skills and knowledge to potential employers. It can also help organizations identify qualified developers who can design and deploy secure and scalable AWS applications that meet their business needs.
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A development team maintains a web application by using a single AWS CloudFormation template. The template defines web servers and an Amazon RDS database. The team uses the Cloud Formation template to deploy the Cloud Formation stack to different environments.
During a recent application deployment, a developer caused the primary development database to be dropped and recreated. The result of this incident was a loss of data. The team needs to avoid accidental database deletion in the future.
Which solutions will meet these requirements? (Choose two.)
A. Add a CloudFormation Deletion Policy attribute with the Retain value to the database resource.
B. Modify the database to use a Multi-AZ deployment.
C. Update the CloudFormation stack policy to prevent updates to the database.
D. Create a CloudFormation stack set for the web application and database deployments.
E. Add a Cloud Formation DeletionPolicy attribute with the Retain value to the stack.
Answer: A,C
Explanation:
AWS CloudFormation is a service that enables developers to model and provision AWS resources using templates. The developer can add a CloudFormation Deletion Policy attribute with the Retain value to the database resource. This will prevent the database from being deleted when the stack is deleted or updated. The developer can also update the CloudFormation stack policy to prevent updates to the database. This will prevent accidental changes to the database configuration or properties.
References:
* [What Is AWS CloudFormation? - AWS CloudFormation]
* [DeletionPolicy Attribute - AWS CloudFormation]
* [Protecting Resources During Stack Updates - AWS CloudFormation]
NEW QUESTION # 231
A company hosts a client-side web application for one of its subsidiaries on Amazon S3. The web application can be accessed through Amazon CloudFront from https://www.example.com. After a successful rollout, the company wants to host three more client-side web applications for its remaining subsidiaries on three separate S3 buckets. To achieve this goal, a developer moves all the common JavaScript files and web fonts to a central S3 bucket that serves the web applications. However, during testing, the developer notices that the browser blocks the JavaScript files and web fonts.
What should the developer do to prevent the browser from blocking the JavaScript files and web fonts?
A. Create a Content-MD5 header that provides a message integrity check for the central S3 bucket.Insert the Content-MD5 header for each web application request.
B. Create a cross-origin resource sharing (CORS) configuration that allows access to the central S3 bucket. Add the CORS configuration to the central S3 bucket.
C. Create a bucket policy that allows access to the central S3 bucket. Attach the bucket policy to the central S3 bucket.
D. Create four access points that allow access to the central S3 bucket. Assign an access point to each web application bucket.
Answer: B
Explanation:
This is a frequent trouble. Web applications cannot access the resources in other domains by default, except some exceptions. You must configure CORS on the resources to be accessed. https://docs.aws.amazon.com/AmazonS3/latest/userguide/cors.html
NEW QUESTION # 232
An ecommerce company is using an AWS Lambda function behind Amazon API Gateway as its application tier. To process orders during checkout, the application calls a POST API from the frontend. The POST API invokes the Lambda function asynchronously. In rare situations, the application has not processed orders. The Lambda application logs show no errors or failures.
What should a developer do to solve this problem?
A. Inspect the Lambda logs in Amazon CloudWatch for possible errors. Fix the errors.
B. Create and inspect the Lambda dead-letter queue. Troubleshoot the failed functions. Reprocess the events.
C. Make sure that caching is disabled for the POST API in API Gateway.
D. Inspect the frontend logs for API failures. Call the POST API manually by using the requests from the log file.
Answer: B
Explanation:
The solution that will solve this problem is to create and inspect the Lambda dead-letter queue. Troubleshoot the failed functions. Reprocess the events. This way, the developer can identify and fix any issues that caused the Lambda function to fail when invoked asynchronously by API Gateway. The developer can also reprocess any orders that were not processed due to failures. The other options either do not address the root cause of the problem, or do not help recover from failures.
Reference: Asynchronous invocation
NEW QUESTION # 233
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. 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.
B. Turn on read capacity auto scaling for the DynamoDB table. Increase the maximum read capacity units (RCUs).
C. 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.
D. Create a global secondary index (GSI). Set query attribute to be the partition key of the index
Answer: D
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 # 234
A development team maintains a web application by using a single AWS CloudFormation template. The template defines web servers and an Amazon RDS database. The team uses the Cloud Formation template to deploy the Cloud Formation stack to different environments.
During a recent application deployment, a developer caused the primary development database to be dropped and recreated. The result of this incident was a loss of data. The team needs to avoid accidental database deletion in the future.
Which solutions will meet these requirements? (Choose two.)
A. Add a CloudFormation Deletion Policy attribute with the Retain value to the database resource.
B. Modify the database to use a Multi-AZ deployment.
C. Update the CloudFormation stack policy to prevent updates to the database.
D. Create a CloudFormation stack set for the web application and database deployments.
E. Add a Cloud Formation DeletionPolicy attribute with the Retain value to the stack.
Answer: A,C
Explanation:
Explanation
AWS CloudFormation is a service that enables developers to model and provision AWS resources using templates. The developer can add a CloudFormation Deletion Policy attribute with the Retain value to the database resource. This will prevent the database from being deleted when the stack is deleted or updated.
The developer can also update the CloudFormation stack policy to prevent updates to the database. This will prevent accidental changes to the database configuration or properties.
References:
[What Is AWS CloudFormation? - AWS CloudFormation]
[DeletionPolicy Attribute - AWS CloudFormation]
[Protecting Resources During Stack Updates - AWS CloudFormation]
NEW QUESTION # 235
......
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