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Amazon AWS Certified Developer Associate Exam (DVA-C02) Sample Questions (Q76-Q81):

NEW QUESTION # 76
A developer has designed a customer, facing application that is running on an Amazon EC2 instance. The application logs every request made to it. The application usually runs seamlessly, but a spike in traffic generates several logs that cause the disk to fill up and eventually run out of memory Company policy requires old to be centralized for analysis.
Which long-term solution should the developer employ to prevent the issue from reoccurring?

A. Enable AWS Auto Scaling on Amazon Elastic Block Store (Amazon EBS) to automatically add volumes to the instance when it reaches a specified threshold.
B. Install the Amazon CloudWatch agent on the instance to send the logs to CloudWatch. Delete the logs from the instance once they are sent to CloudWatch.
C. Enable AWS Auto Scaling on Amazon Elastic Block Store (Amazon EBS) a outomatically add volume to the instance when it reaches a specified threshold.
D. Create an Amazon EventBridge (Amazon CloudWatch Events) rule to pull the logs from the instance.
Configure the rule to delete the logs they have been pulled.

Answer: D

NEW QUESTION # 77
An application is using single -node Amazon ElastiCache for Redis instance to improve read performance.
Over time, demand for the application has increased exponentially, which has increased the load on the ElastiCache instance. It is critical that this cache layer handles the load and is resilient in case of node failures.
What can the Developer do to address the load and resiliency requirements?

A. Vertically scale the ElastiCache instance.
B. Add a read replica instance.
C. Migrate to an Amazon ElastiCache service cluster.
D. Migrate to a Memcached cluster.

Answer: B

Explanation:
Reference: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.html

NEW QUESTION # 78
A developer is deploying a new application to Amazon Elastic Container Service (Amazon ECS). The developer needs to securely store and retrieve different types of variables. These variables include authentication information for a remote API, the URL for the API, and credentials. The authentication information and API URL must be available to all current and future deployed versions of the application across development, testing, and production environments.
How should the developer retrieve the variables with the FEWEST application changes?

A. Update the application to retrieve the variables from AWS Systems Manager Parameter Store. Use unique paths in Parameter Store for each variable in each environment. Store the credentials in AWS Secrets Manager in each environment.
B. Update the application to retrieve the variables from an encrypted file that is stored with the application.
Store the API URL and credentials in unique files for each environment.
C. Update the application to retrieve the variables from AWS Key Management Service (AWS KMS).
Store the API URL and credentials as unique keys for each environment.
D. Update the application to retrieve the variables from each of the deployed environments. Define the authentication information and API URL in the ECS task definition as unique names during the deployment process.

Answer: C

NEW QUESTION # 79
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. 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.
B. Encode a picture using base64. Save the base64 string in an Amazon DB 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. Create an Amazon S3 VPC endpoint to allow the employees to download pictures once they log in.
D. 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.

Answer: C

Explanation:
Explanation/Reference: https://aws.amazon.com/premiumsupport/knowledge-center/s3-private-connection-no- authentication/

NEW QUESTION # 80
A company needs a version control system for collaborative software development. Features of the system must include the following:
Support for batches of changes across multiple files
Parallel branching
Which AWS service will meet these requirements?

A. AWS CodeCommit
B. AWS Code Build
C. AWS CodePipeline
D. Amazon S3

Answer: A

Explanation:
https://docs.aws.amazon.com/codecommit/latest/userguide/welcome.html

NEW QUESTION # 81
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