CSOSS uses what process to maintain capability when a fault occurs?

• A. Fault tolerance
• B. Shutting down all systems
• C. Ignoring the fault until mission end
• D. Replacing the entire system

Answer: (A)

Fault tolerance is the ability of a system to keep operating when a fault occurs by design, using redundancy, detection, and automatic recovery so essential functions remain available. In CSOSS, this means the system can continue to perform critical tasks even if a component fails by routing around the problem, activating backup equipment, and keeping mission-critical operations steady while the fault is isolated or repaired. Shutting down all systems would remove capability entirely; ignoring the fault risks further damage or degraded performance; replacing the entire system is unnecessary when built-in backups and automatic recovery can preserve operation with the fault present.