AWS Certified Solutions Architect – Associate (SAA-C02) — Question 188

A company is building a website that relies on reading and writing to an Amazon DynamoDB database. The traffic associated with the website predictably peaks during business hours on weekdays and declines overnight and during weekends. A solutions architect needs to design a cost-effective solution that can handle the load.
What should the solutions architect do to meet these requirements?

Answer options

• A. Enable DynamoDB Accelerator (DAX) to cache the data.
• B. Enable Multi-AZ replication for the DynamoDB database.
• C. Enable DynamoDB auto scaling when creating the tables.
• D. Enable DynamoDB On-Demand capacity allocation when creating the tables.

Correct answer: C

Explanation

The correct answer is C because enabling DynamoDB auto scaling allows the database to automatically adjust its read and write capacity based on the traffic patterns, ensuring cost-effectiveness during peak and off-peak times. Option A is incorrect as DAX is for caching and does not address load management. Option B is not suitable since Multi-AZ replication is for availability, not capacity management. Option D, while beneficial for unpredictable workloads, does not provide the same level of cost efficiency as auto scaling for predictable traffic patterns.