What does data persistence mean and name a persistent storage medium?

What does data persistence mean and name a persistent storage medium?

• A. Data is lost after a system reboot.
• B. Data stored only in cache memory.
• C. Data that is never written to storage.
• D. Data remains available after power is removed; example: SSD, HDD, USB flash drive.

Answer: (D)

Data persistence means keeping information available even after the computer loses power or restarts. This relies on non-volatile storage, which preserves data without continual power. A persistent storage medium is any device that retains data when power is off, such as SSDs, HDDs, or USB flash drives. That’s why the example listing SSD, HDD, and USB flash drive is the best choice—it demonstrates both the idea of data lasting beyond a power cycle and concrete devices that store data non-volatily. The other descriptions describe data that would not survive power loss—like being in cache or never being written to storage—so they don’t fit the concept of persistence.

Data persistence means keeping information available even after the computer loses power or restarts. This relies on non-volatile storage, which preserves data without continual power. A persistent storage medium is any device that retains data when power is off, such as SSDs, HDDs, or USB flash drives. That’s why the example listing SSD, HDD, and USB flash drive is the best choice—it demonstrates both the idea of data lasting beyond a power cycle and concrete devices that store data non-volatily. The other descriptions describe data that would not survive power loss—like being in cache or never being written to storage—so they don’t fit the concept of persistence.