AWS Certified Developer Associate Practice Exam

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What is the maximum read throughput setting for an application with 600 items of data every minute, where each item is 5 KB and uses eventually consistent reads?

5 provisioned read capacity units

10 provisioned read capacity units

To determine the maximum read throughput setting for the described application, it's essential to understand how provisioning read capacity units works in Amazon DynamoDB, especially in the context of eventually consistent reads.

An eventually consistent read provides the result of a read operation that might not reflect the most recent write operation, which typically uses half of a read capacity unit for items less than or equal to 4 KB. For items larger than 4 KB, you are required to round up to the nearest 4 KB chunk.

In this scenario, each item is 5 KB. Thus, each item requires 2 read capacity units for eventually consistent reads (1 read capacity unit for the first 4 KB and another for the next 1 KB).

Given that there are 600 items of data every minute, we can calculate the required read capacity units as follows:

1. Each item requires 2 read capacity units (since it’s 5 KB).

2. For 600 items, the total read capacity units required per minute would be:

\[

600 \text{ items} \times 2 \text{ read capacity units/item} = 1200 \text{ read capacity units per minute}

\]

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15 provisioned read capacity units

20 provisioned read capacity units

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