What does it mean when data is described as 'volatile'?

When data is described as 'volatile,' it refers to the characteristic of the data being lost when the power is disconnected. This typically pertains to types of memory like RAM (Random Access Memory), which store information temporarily while the device is powered on. Once the power goes off, any data that was held in this volatile memory is erased and cannot be retrieved.

In contrast, non-volatile data is stored in a way that it remains intact regardless of power status, such as data saved on hard drives or solid-state drives. Understanding the distinction between volatile and non-volatile data is crucial for effective data management and systems design, particularly when considering the implications for memory usage and data retention in computing environments.