How does computer store everything which is saved even after switching off?
In: 0
Computers have two different categories of storage. Long term storage, and short term storage.
Short term storage is wiped as soon as the power is turned off.
The long term storage like, hard drives, CDs, thumb drives, tapes, etc etc. All store data in a way that does not require constant electricity to keep the 1s and 0s in their place. Some use magnetic fields, some use physical pits and flats.
Flash memory which is the coolest, for ELI5 purposes I will say that it essentially captures the electricity to hold it, but does not require electricity to do so. Much like how putting water in a bucket does not require any additional energy to keep it there, only to add and remove the water.
Latest Answers