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NEW QUESTION 45
A company is about to launch a new product, and test databases must be re-created from production data. The company runs its production databases on an Amazon Aurora MySQL DB cluster. A Database Specialist needs to deploy a solution to create these test databases as quickly as possible with the least amount of administrative effort.
What should the Database Specialist do to meet these requirements?

• A. Add an additional read replica to the production cluster and use that node for testing
• B. Restore a snapshot from the production cluster into test clusters
• C. Create logical dumps of the production cluster and restore them into new test clusters
• D. Use database cloning to create clones of the production cluster

Answer: D

Explanation:
Explanation
https://aws.amazon.com/getting-started/hands-on/aurora-cloning-backtracking/
"Cloning an Aurora cluster is extremely useful if you want to assess the impact of changes to your database, or if you need to perform workload-intensive operations-such as exporting data or running analytical queries, or simply if you want to use a copy of your production database in a development or testing environment. You can make multiple clones of your Aurora DB cluster. You can even create additional clones from other clones, with the constraint that the clone databases must be created in the same region as the source databases.

NEW QUESTION 46
A company stores session history for its users in an Amazon DynamoDB table. The company has a large user base and generates large amounts of session data.
Teams analyze the session data for 1 week, and then the data is no longer needed. A database specialist needs to design an automated solution to purge session data that is more than 1 week old.
Which strategy meets these requirements with the MOST operational efficiency?

• A. Create an AWS Step Functions state machine with a DynamoDB DeleteItem operation that uses the ConditionExpression parameter to delete items older than a week. Create an Amazon EventBridge (Amazon CloudWatch Events) scheduled rule that runs the Step Functions state machine on a weekly basis.
• B. Enable TTL on the DynamoDB table and set a Number data type as the TTL attribute. DynamoDB will automatically delete items that have a TTL that is less than the current time.
• C. Create an AWS Lambda function to delete items older than a week from the DynamoDB table. Create an Amazon EventBridge (Amazon CloudWatch Events) scheduled rule that triggers the Lambda function on a weekly basis.
• D. Enable Amazon DynamoDB Streams on the table. Use a stream to invoke an AWS Lambda function to delete items older than a week from the DynamoDB table

Answer: B

Explanation:
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/TTL.html

NEW QUESTION 47
A database specialist needs to review and optimize an Amazon DynamoDB table that is experiencing performance issues. A thorough investigation by the database specialist reveals that the partition key is causing hot partitions, so a new partition key is created. The database specialist must effectively apply this new partition key to all existing and new data.
How can this solution be implemented?

• A. Use the AWS CLI to back up the DynamoDB table. Then use the restore-table-from-backup command and modify the partition key.
• B. Use Amazon EMR to export the data from the current DynamoDB table to Amazon S3. Then use Amazon EMR again to import the data from Amazon S3 into a new DynamoDB table with the new partition key.
• C. Use the AWS CLI to update the DynamoDB table and modify the partition key.
• D. Use AWS DMS to copy the data from the current DynamoDB table to Amazon S3. Then import the DynamoDB table to create a new DynamoDB table with the new partition key.

Answer: B

Explanation:
https://aws.amazon.com/premiumsupport/knowledge-center/back-up-dynamodb-s3/

NEW QUESTION 48
A business is launching a new Amazon RDS for SQL Server database instance. The organization wishes to allow auditing of the SQL Server database.
Which measures should a database professional perform in combination to achieve this requirement? (Select two.)

• A. Create a service-linked role for Amazon RDS that grants permissions for Amazon RDS to store audit logs on Amazon S3.
• B. Disable automated backup on the DB instance, and then enable auditing. Enable automated backup after auditing is enabled.
• C. Disable Multi-AZ on the DB instance, and then enable auditing. Enable Multi-AZ after auditing is enabled.
• D. Set up a parameter group to configure an IAM role and an Amazon S3 bucket for audit log storage.Associate the parameter group with the DB instance.
• E. Set up an options group to configure an IAM role and an Amazon S3 bucket for audit log storage.Associate the options group with the DB instance.

Answer: A,E

Explanation:
Explanation
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Appendix.SQLServer.Options.Audit.html
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/security_iam_service-with-iam.html

NEW QUESTION 49
An online advertising website uses an Amazon DynamoDB table with on-demand capacity mode as its data store. The website also has a DynamoDB Accelerator (DAX) cluster in the same VPC as its web application server. The application needs to perform infrequent writes and many strongly consistent reads from the data store by querying the DAX cluster.
During a performance audit, a systems administrator notices that the application can look up items by using the DAX cluster. However, the QueryCacheHits metric for the DAX cluster consistently shows 0 while the QueryCacheMisses metric continuously keeps growing in Amazon CloudWatch.
What is the MOST likely reason for this occurrence?

• A. DynamoDB is scaling due to a burst in traffic, resulting in degraded performance.
• B. A VPC endpoint was not added to access DynamoDB.
• C. Strongly consistent reads are always passed through DAX to DynamoDB.
• D. A VPC endpoint was not added to access CloudWatch.

Answer: C

Explanation:
Explanation
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DAX.concepts.html
"If the request specifies strongly consistent reads, DAX passes the request through to DynamoDB. The results from DynamoDB are not cached in DAX. Instead, they are simply returned to the application."

NEW QUESTION 50
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