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Amazon AWS Certified Developer - Associate Sample Questions (Q322-Q327):

NEW QUESTION # 322
An engineer created an A/B test of a new feature on an Amazon CloudWatch Evidently project.
The engineer configured two variations of the feature (Variation A and Variation B) for the test.
The engineer wants to work exclusively with Variation A.
The engineer needs to make updates so that Variation A is the only variation that appears when the engineer hits the application's endpoint.
Which solution will meet this requirement?

A. Add an override to the feature. Set the identifier of the override to Variation A. Set the variation to 100%.
B. Add an experiment to the project. Set the identifier of the experiment to the AWS account's account ISet the variation to Variation A.
C. Add an experiment to the project. Set the identifier of the experiment to Variation B. Set the variation to 0%.
D. Add an override to the feature. Set the identifier of the override to the engineer's user ID. Set the variation to Variation A.

Answer: D

Explanation:
Overrides let you pre-define the variation for selected users. to always receive the editable variation.
https://aws.amazon.com/blogs/aws/cloudwatch-evidently/

NEW QUESTION # 323
A company is migrating an on-premises database to Amazon RDS for MySQL. The company has read- heavy workloads. The company wants to refactor the code to achieve optimum read performance for queries.
Which solution will meet this requirement with LEAST current and future effort?

A. Use open source replication software to create a copy of the MySQL database on an Amazon EC2 instance. Modify the application code so that queries use the IP address of the EC2 instance.
B. Use a multi-AZ Amazon RDS deployment. Increase the number of connections that the code makes to the database or increase the connection pool size if a connection pool is in use.
C. Deploy Amazon RDS with one or more read replicas. Modify the application code so that queries use the URL for the read replicas.
D. Use a multi-AZ Amazon RDS deployment. Modify the code so that queries access the secondary RDS instance.

Answer: C

Explanation:
https://aws.amazon.com/rds/features/read-replicas/

NEW QUESTION # 324
In a move toward using microservices, a company's management team has asked all development teams to build their services so that API requests depend only on that service's data store. One team is building a Payments service which has its own database; the service needs data that originates in the Accounts database.
Both are using Amazon DynamoDB.
What approach will result in the simplest, decoupled, and reliable method to get near-real time updates from the Accounts database?

A. Use Amazon ElastiCache in Payments, with the cache updated by triggers in the Accounts database.
B. Use AWS Glue to perform frequent ETL updates from the Accounts database to the Payments database.
C. Use Amazon Data Firehose to deliver all changes from the Accounts database to the Payments database.
D. Use Amazon DynamoDB Streams to deliver all changes from the Accounts database to the Payments database.

Answer: D

NEW QUESTION # 325
A developer is creating an AWS Lambda function in VPC mode An Amazon S3 event will invoke the Lambda function when an object is uploaded into an S3 bucket The Lambda function will process the object and produce some analytic results that will be recorded into a file Each processed object will also generate a log entry that will be recorded into a file.
Other Lambda functions. AWS services, and on-premises resources must have access to the result files and log file. Each log entry must also be appended to the same shared log file. The developer needs a solution that can share files and append results into an existing file.
Which solution should the developer use to meet these requirements?

A. Create an Amazon Elastic File System (Amazon EFS) file system. Mount the EFS file system in Lambda. Store the result files and log file in the mount point. Append the log entries to the log file.
B. Create a reference to the /tmp local directory. Store the result files and log file by using the directory reference. Append the log entry to the log file.
C. Create an Amazon Elastic Block Store (Amazon EBS) Multi-Attach enabled volume Attach the EBS volume to all Lambda functions. Update the Lambda function code to download the log file, append the log entries, and upload the modified log file to Amazon EBS
D. Create a reference to the /opt storage directory Store the result files and log file by using the directory reference Append the log entry to the log file

Answer: A

Explanation:
* Amazon EFS: A network file system (NFS) providing shared, scalable storage across multiple Lambda functions and other AWS resources.
* Lambda Mounting: EFS file systems can be mounted within Lambda functions to access a shared storage space.
* Log Appending: EFS supports appending data to existing files, making it ideal for the log file scenario.

NEW QUESTION # 326
A company has an Amazon S3 bucket that contains sensitive dat
a. The data must be encrypted in transit and at rest. The company encrypts the data in the S3 bucket by using an AWS Key Management Service (AWS KMS) key. A developer needs to grant several other AWS accounts the permission to use the S3 GetObject operation to retrieve the data from the S3 bucket.
How can the developer enforce that all requests to retrieve the data provide encryption in transit?

A. Define a resource-based policy on the KMS key to deny access when a request meets the condition of "aws:SecureTransport": "false".
B. Define a role-based policy on the other accounts' roles to deny access when a request meets the condition of "aws:SecureTransport": "false".
C. Define a resource-based policy on the S3 bucket to deny access when a request meets the condition "aws:SecureTransport": "false".
D. Define a resource-based policy on the S3 bucket to allow access when a request meets the condition "aws:SecureTransport": "false".

Answer: C

Explanation:
Amazon S3 supports resource-based policies, which are JSON documents that specify the permissions for accessing S3 resources. A resource-based policy can be used to enforce encryption in transit by denying access to requests that do not use HTTPS. The condition key aws:SecureTransport can be used to check if the request was sent using SSL. If the value of this key is false, the request is denied; otherwise, the request is allowed. Reference: How do I use an S3 bucket policy to require requests to use Secure Socket Layer (SSL)?

NEW QUESTION # 327
......

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