Which feature prevents data loss during VM operations despite system failures or crashes?

Fault Tolerance is a feature that provides continuous availability for virtual machines (VMs) by creating a live shadow instance of a VM. This ensures that if the primary VM encounters a failure or crashes, the secondary instance can immediately take over without any interruption or data loss. The technology behind Fault Tolerance allows for the primary VM to operate normally while simultaneously streaming a copy of the VM state to the shadow VM.

This feature is especially crucial in environments that require maximum uptime and data integrity, such as financial applications or mission-critical workloads, where even a brief outage can lead to significant data loss or disruption. Unlike other features that provide recovery after failure or improve operational efficiency, Fault Tolerance is specifically designed to prevent data loss during operations by maintaining a live backup that can seamlessly take over in the event of a failure.