An application uses Amazon DynamoDB. The workload is highly unpredictable, with sudden, massive spikes in read and write traffic followed by long periods of inactivity. The architect wants to minimize costs while ensuring the application is never throttled. Which DynamoDB capacity mode should be used?

Answer options:

Provisioned Capacity Mode with Auto Scaling

On-Demand Capacity Mode

Provisioned Capacity Mode with a high baseline

DynamoDB Standard-IA table class

How to approach this question

Match 'highly unpredictable' and 'sudden spikes' to On-Demand capacity.

Full Answer

B.On-Demand Capacity Mode✓ Correct

On-Demand Capacity Mode

Amazon DynamoDB On-Demand is a flexible billing option capable of serving thousands of requests per second without capacity planning. It is ideal for unpredictable workloads with sudden spikes.

Common mistakes

Choosing Provisioned with Auto Scaling, which cannot scale fast enough for 'sudden, massive spikes'.

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Practice the full AWS Solutions Architect Professional SAP-C02 Practice Exam 1

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