Fault-tolerance

Fault-tolerance is like having a backup plan in case something goes wrong. It's like when you have a toy that you really like, but if it stops working, you have another toy that you can play with. This way, you won't be sad if your first toy breaks.

In computers, there are many parts that work together to make them work. If one of these parts breaks, it can stop the whole computer from working. So, to make sure the computer keeps working no matter what, fault-tolerance is used. This means that if one part breaks, there is another part that can take over and keep the computer running.

It's like having two batteries in a toy car. If one of the batteries dies, the other battery can still power the car and keep it moving. Fault-tolerance works the same way, by having something ready to take over if something else fails. This makes sure that the computer stays working and nothing bad happens, like losing important information or not being able to do important tasks.