AWS DevOps Engineer Professional Practice Test 2025 - Free DevOps Practice Questions and Certification Study Guide

To determine the correct provisioned capacity for an application using DynamoDB that handles high throughput with a 12 KB item, it's important to understand how DynamoDB calculates read and write capacity units.

For read operations, DynamoDB measures the size of the item being read. A single read capacity unit allows for one strongly consistent read of an item up to 4 KB in size. Since the item is 12 KB, it would consume 3 read capacity units (12 KB / 4 KB).

In a high-throughput scenario, if your application requires a specific number of strong reads per second, you can multiply that number by the read capacity units needed per item. The same calculation applies for write operations: one write capacity unit allows writing an item up to 1 KB in size. Thus, a 12 KB item would consume 12 write capacity units (12 KB / 1 KB).

Based on this understanding, an application might require significant capacity. For instance, if a reasonable high throughput requirement is set, you would ratio the number of reads and writes that the application expects.

Given these calculations, the selection that highlights a substantial amount of read (300) and write (600) capacity units is suitable for scaling and ensuring that the application