A Retail Company with Its Main Office in New York

question 126

Multiple Choice

A retail company with its main office in New York and another office in Tokyo plans to build a database solution on AWS. The company's main workload consists of a mission-critical application that updates its application data in a data store. The team at the Tokyo office is building dashboards with complex analytical queries using the application data. The dashboards will be used to make buying decisions, so they need to have access to the application data in less than 1 second. Which solution meets these requirements?

• A) Use an Amazon RDS DB instance deployed in the us-east-1 Region with a read replica instance in the ap-northeast-1 Region. Create an Amazon ElastiCache cluster in the ap-northeast-1 Region to cache application data from the replica to generate the dashboards.
• B) Use an Amazon DynamoDB global table in the us-east-1 Region with replication into the ap-northeast-1 Region. Use Amazon QuickSight for displaying dashboard results.
• C) Use an Amazon RDS for MySQL DB instance deployed in the us-east-1 Region with a read replica instance in the ap-northeast-1 Region. Have the dashboard application read from the read replica.
• D) Use an Amazon Aurora global database. Deploy the writer instance in the us-east-1 Region and the replica in the ap-northeast-1 Region. Have the dashboard application read from the replica ap-northeast-1 Region.

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Definitions:

Instrumental Conditioning

Also known as operant conditioning, a learning process in which behavior is strengthened or weakened by its consequences, rewards, or punishments.

Reinforcement

In behavioral psychology, it is any stimulus which strengthens or increases the probability of a specific response.

Response

The reaction or reply to a stimulus or situation in the environment, often studied in psychology to understand behavior.

Operants

Behaviors that are modified by their consequences, a concept central to operant conditioning theory in psychology.