Medium Apply Back-of-Envelope Estimation Multiple Choice

What storage tier should hold data older than 1 year in a system with a 3-year retention requirement?

Apply — Tests ability to use knowledge in practical scenarios.

Answer Options

A NVMe SSD (hot tier)

B SAS SSD (warm tier)

C Object storage or HDD (cold tier)

D In-memory cache

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This question is from the Back-of-Envelope Estimation topic (System Design).

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