Why is nonvolatility an important property for memory in cer

Why is non-volatility an important property for memory in certain applications?

Solution

non volatile memory means the ability of a system to restore or capable of retrieving its data even the power is switched off.

It is used as secondary storage. Non-volatile memory can be categorized in electrically systems i.e., read-only memory and mechanically addressed systems i.e., hard disks , magnetic tape, holographic memory.

Electrically addressed systems are expensive, but good speed whereas mechanically addressed systems have a low price per bit, but are slow. Non-volatile memory may one day eliminate the need for comparatively slow forms of secondary storage systems, which include hard disks.