If a power outage would cause all racks to lose power because there are no UPS units, this is an example of what?

If a power outage would cause all racks to lose power because there are no UPS units, this is an example of what?

• A. Redundancy
• B. Fault Tolerance
• C. Single Point of Failure
• D. Availability

Answer: (C)

Single point of failure is when the system depends on a single component, and that one failure brings everything down. In this case, all racks rely on the same power source, and there are no UPS units to bridge an outage. If the power goes out, there’s no backup path to keep any rack running, so the entire setup loses power. That vulnerability—the reliance on one power source without backup—defines a single point of failure. If you had redundancy (UPS, multiple power feeds), the outage wouldn’t collapse all racks, illustrating fault tolerance and better availability.

Single point of failure is when the system depends on a single component, and that one failure brings everything down. In this case, all racks rely on the same power source, and there are no UPS units to bridge an outage. If the power goes out, there’s no backup path to keep any rack running, so the entire setup loses power. That vulnerability—the reliance on one power source without backup—defines a single point of failure. If you had redundancy (UPS, multiple power feeds), the outage wouldn’t collapse all racks, illustrating fault tolerance and better availability.