C). Installing redundant PSUs (Power Supply Units):
Redundant PSUs provide fault tolerance by ensuring that if one power supply fails, another will take over seamlessly.
This is a cost-effective way to increase uptime while waiting for the UPSs to arrive.
Incorrect Options:
A). Purchasing backup generators: Generators are costly and are typically used for long-term outages, not as an immediate or cost-effective solution.
B). Increasing input voltage: This is not a practical solution to hardware failures or power issues.
D). Activating a hot site: A hot site is an expensive, fully operational backup facility that would not be a cost- effective solution for this scenario.
Key Takeaway: Installing redundant PSUs is a cost-effective way to balance uptime requirements in case of power or hardware failure.
Reference: CompTIA A+ Core 1 Exam Objectives (220-1201), Domain 5.3 - Power-related troubleshooting.