Data tiering involves?

• A. Allocating storage on demand as data is written.
• B. Using RAM to speed up data access.
• C. Moving data between performance tiers (e.g., SSD vs HDD) based on access patterns.
• D. Copying data to a remote site.

Answer: (C)

Data tiering means placing data across storage media that have different performance and cost characteristics and moving data between those media based on how it’s accessed. The idea is to keep hot data on fast storage (like SSDs) and move colder data to cheaper, slower storage (like HDDs or archival tiers) according to usage patterns or lifecycle rules. This automation helps balance performance with cost.

The correct idea is about shifting data between performance tiers based on access patterns. The other options describe different concepts: using RAM to speed access is caching in memory, provisioning storage as data is written is about upfront capacity allocation, and copying data to a remote site is replication/DR, not tiering.