SAA-C03 Q362 · Database

Question

A company runs a mobile game app that stores session data (up to 256 KB) for up to 48 hours. The data updates frequently and must be deleted automatically after expiration. Restorability is also required. Which solution will meet these requirements?

Accepted Answer

**Answer A: DynamoDB with PITR and TTL** satisfies every requirement:

1. **Session data up to 256 KB**: DynamoDB supports items up to 400 KB, so 256 KB fits comfortably within a single item.

2. **Frequent updates**: DynamoDB is purpose-built for low-latency, high-throughput read/write operations — ideal for mobile game session data that changes constantly.

3. **Automatic deletion after 48 hours (TTL)**: DynamoDB's **Time to Live (TTL)** feature lets you define a per-item expiration timestamp attribute. DynamoDB automatically deletes expired items at no additional cost, with no need for custom cleanup logic.

4. **Restorability**: DynamoDB **Point-in-Time Recovery (PITR)** provides continuous backups with the ability to restore to any second within the last 35 days. If data is accidental

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