DVA-C02 · Question #681
DVA-C02 Question #681: Real Exam Question with Answer & Explanation
The correct answer is C: 160 read capacity units (RCUs). Each item size is up to 7 KB, which requires 2 read capacity units (RCUs) per strongly consistent read because 1 RCU covers up to 4 KB for strongly consistent reads. For 80 items per second: 80 items × 2 RCUs = 160 RCUs.
Question
A developer is building a web application. The application will read temperature information from an Amazon DynamoDB table and will display the information for users. Each record is 5 KB to 7 KB in size. The application can request up to 80 items each second. The application must always return the most recent temperature values from the table. How much read throughput is required to meet this load?
Options
- A40 read capacity units (RCUs)
- B80 read capacity units (RCUs)
- C160 read capacity units (RCUs)
- D560 read capacity units (RCUs)
Explanation
Each item size is up to 7 KB, which requires 2 read capacity units (RCUs) per strongly consistent read because 1 RCU covers up to 4 KB for strongly consistent reads. For 80 items per second: 80 items × 2 RCUs = 160 RCUs.
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