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NEW QUESTION 50
A manufacturing company has an. inventory system that stores information in an Amazon Aurora MySQL DB cluster. The database tables are partitioned. The database size has grown to 3 TB. Users run one-time queries by using a SQL client. Queries that use an equijoin to join large tables are taking a long time to run.
Which action will improve query performance with the LEAST operational effort?

  • A. Enable hash joins on the database by setting the variable optimizer_switch to hash_join=on.
  • B. Add an Aurora read replica.
  • C. Take a snapshot of the DB cluster. Create a new DB instance by using the snapshot, and enable parallel query mode.
  • D. Migrate the database to a new Amazon Redshift data warehouse.

Answer: A

Explanation:
https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.BestPractices.html

 

NEW QUESTION 51
After restoring an Amazon RDS snapshot from 3 days ago, a company’s Development team cannot connect to the restored RDS DB instance. What is the likely cause of this problem?

  • A. The restored DB instance is using the default security group
  • B. The restored DB instance does not have Enhanced Monitoring enabled
  • C. The production DB instance is using a custom option group
  • D. The production DB instance is using a custom parameter group

Answer: A

Explanation:
https://aws.amazon.com/premiumsupport/knowledge-center/rds-cannot-connect/
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_RestoreFromSnapshot.html

 

NEW QUESTION 52
A business is operating an on-premises application that is divided into three tiers: web, application, and MySQL database. The database is predominantly accessed during business hours, with occasional bursts of activity throughout the day. As part of the company’s shift to AWS, a database expert wants to increase the availability and minimize the cost of the MySQL database tier.
Which MySQL database choice satisfies these criteria?

  • A. Amazon Aurora Serverless MySQL cluster
  • B. Amazon RDS for MySQL with Multi-AZ
  • C. Amazon RDS for MySQL with read replica
  • D. Amazon Aurora MySQL cluster

Answer: A

Explanation:
Amazon Aurora Serverless v1 is a simple, cost-effective option for infrequent, intermittent, or unpredictable workloads. https://aws.amazon.com/rds/aurora/serverless/

 

NEW QUESTION 53
An online shopping company has a large inflow of shopping requests daily. As a result, there is a consistent load on the company’s Amazon RDS database. A database specialist needs to ensure the database is up and running at all times. The database specialist wants an automatic notification system for issues that may cause database downtime or for configuration changes made to the database.
What should the database specialist do to achieve this? (Choose two.)

  • A. Enable email notifications for AWS Trusted Advisor.
  • B. Subscribe to an RDS event subscription and configure it to use an Amazon SNS topic to send notifications.
  • C. Configure Amazon CloudWatch alarms on various metrics, such as FreeStorageSpace for the RDS instance.
  • D. Create an Amazon CloudWatch Events event to send a notification using Amazon SNS on every API call logged in AWS CloudTrail.
  • E. Use Amazon SES to send notifications based on configured Amazon CloudWatch Events events.

Answer: B,E

 

NEW QUESTION 54
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