Which type of memory is stored in a hard disk and is not lost when the power is off?

Non-volatile memory is designed to retain data even when the power is turned off, making it ideal for long-term storage solutions. Hard disks, as a form of non-volatile memory, save data permanently until it is explicitly deleted or modified by the user. This characteristic allows users to store files, applications, and system data that are accessible whenever the computer is powered on.

In contrast, volatile memory, such as Random Access Memory (RAM), requires power to maintain the stored information, which is why it loses data when the power is turned off. Temporary memory generally refers to RAM or other types of fast storage that support active processes but is not meant for long-term data retention. Dynamic memory typically refers to a type of volatile memory that is constantly refreshed to retain data but does not provide the same permanence as non-volatile memory. Thus, the definition and function of non-volatile memory align perfectly with the characteristics of a hard disk.