What term describes the characteristic of a database to retain data over time, even when the power is turned off or the system is restarted?
Data volatility
Data persistence
Data redundancy
Data transience
The correct answer is 'Data persistence'. Data persistence refers to the characteristic of a storage system, such as a database, to save data in non-volatile storage, ensuring it is preserved over time despite events like power outages or system restarts. Without data persistence, information would be lost when the application that created it is closed. 'Data redundancy' refers to having the same piece of data stored in two or more places; this is often part of a backup strategy but is distinct from persistence. 'Data transience' and 'Data volatility' describe the opposite of persistence, where data is temporary and is lost when power is removed, such as data held in RAM.
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