Difference between persistent and non-persistent data

Question

onPause() should be used to save persistent data and onSaveInstanceState(Bundle) is typically used to save non-persistent data.What does that mean?What is difference between persistent and non-persistent data?

Answer 1

Persistence data:
The data which is available after fully closing the application. This type of data must be save into shared preference or database or internal or external memory

Non- persistence data:
The data which is not available after fully closing the application. we can say that non - persistence data mean volatile data that available during the execution of the application.