Which of the following accurately describes non-volatile memory?

Non-volatile memory is a type of computer memory that retains information even when the power supply is turned off. This characteristic is crucial for many applications, as it allows for the storage of data long-term without the need for continuous power.

In terms of speed comparison, non-volatile memory usually does not match the speed of volatile memory, which is designed for high-speed data access during active computing tasks. However, it is typically more expensive than volatile memory because it involves more complex technology to ensure data retention without power.

Thus, the option stating that all of the qualities mentioned accurately describes non-volatile memory reflects the correct understanding. Non-volatile memory retains data without power, it tends to be more expensive than volatile memory, but it is not generally faster. This nuanced understanding is crucial when differentiating these types of memory in computing contexts.