Fault tolerance and fault resilience are both strategies for dealing with system errors. Fault tolerance is the process of anticipating errors in a system and making sure that those errors don't cause significant damage to the system as a whole. This type of error handling is focused on prevention, meaning that it relies on careful planning to make sure that no single component of the system can cause catastrophic failure. It's important to note that while fault tolerance is an effective strategy, it can be costly in terms of time and resources. Fault resilience, on the other hand, is focused more on recovery than prevention. When an error occurs in a resilient system, it will be able to recover quickly without any major disruption to its operations. While this type of error handling may not completely prevent errors from occurring, it will help ensure that any downtime due to errors or failures is minimal. As such, it can be a cost-effective way of ensuring continuity despite occasional issues.