Which term describes storage resilience that allows continued operation during a component failure?

• A. Data deduplication
• B. Snapshots
• C. Thin provisioning
• D. Fault tolerance

Answer: (D)

Fault tolerance describes storage resilience that keeps the system operating when a component fails by using redundancy and automatic failover. If a drive, controller, or path fails, another component takes over so access to data continues with little or no interruption. Data deduplication reduces storage usage, snapshots provide point-in-time copies for recovery, and thin provisioning allocates storage on demand; none of these inherently ensure continuous operation during a failure.