Which term describes data retained after power loss?

Which term describes data retained after power loss?

• A. Persistent
• B. Non-Persistent
• C. High Availability
• D. Replication

Answer: (A)

Persistence is about whether data survives a power cycle. When power is removed, only data stored in non-volatile storage remains intact, while data in volatile memory like RAM is lost. So data described as persistent is retained after power loss, such as files on disk, configuration saved to flash, or records written to storage. The idea is that persistence distinguishes data that survives shutdown from data that does not.

Non-persistent data would not survive power loss; it’s typically stored in volatile memory or temporary caches. High Availability focuses on keeping services up and reachable, not on what happens to data after power is lost. Replication creates copies of data across systems for redundancy, but it doesn’t by itself define what happens to data when power is cut to a single system.