A Company Has a Mobile Chat Application with a Data

question 211

Multiple Choice

A company has a mobile chat application with a data store based in Amazon DynamoDB. Users would like new messages to be read with as little latency as possible. A solutions architect needs to design an optimal solution that requires minimal application changes. Which method should the solutions architect select?

• A) Configure Amazon DynamoDB Accelerator (DAX) for the new messages table. Update the code to use the DAX endpoint.
• B) Add DynamoDB read replicas to handle the increased read load. Update the application to point to the read endpoint for the read replicas.
• C) Double the number of read capacity units for the new messages table in DynamoDB. Continue to use the existing DynamoDB endpoint.
• D) Add an Amazon ElastiCache for Redis cache to the application stack. Update the application to point to the Redis cache endpoint instead of DynamoDB.

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Definitions:

Synovial Joints

A type of joint that is surrounded by a flexible sac filled with lubricating synovial fluid, allowing for smooth movement between the bones.

Fibrous Joints

Joints that are connected by dense connective tissue, consisting largely of collagen. These joints are immovable or only slightly movable, such as sutures in the skull.

Cartilaginous Joints

Joints where the bones are attached via cartilage, allowing for limited movement.

Joint Capsule

A fibrous sac that encloses a joint, containing synovial fluid which lubricates the joint to reduce friction.