What is a characteristic of NVRAM?

NVRAM, or Non-Volatile Random Access Memory, is designed to retain data even when the power is turned off. One of its key characteristics is that it is battery-backed, meaning it has a power source (like a battery) that maintains data integrity during power loss. This feature is essential for scenarios where data consistency is critical, such as in storage systems. By keeping data available even without primary power, NVRAM plays a vital role in ensuring that any critical information cached in memory isn't lost in the case of a system failure or power outage.

While NVRAM can be used for various purposes, including caching, its defining feature in this context is indeed its battery-backed nature. This distinguishes it from other types of storage that may be temporary or not designed for retaining data through power failures.