Which of the following would be the best way to test resiliency in the event of a primary power failure?

Parallel processing involves executing multiple processes simultaneously and does not specifically address resiliency in the context of power failures. While it can enhance performance and efficiency, it does not test the system's response to outages or its capacity to maintain functionality when the primary system fails.

A tabletop exercise is a discussion-based approach where team members review procedures and responses to hypothetical scenarios. Although useful for training and preparedness, it lacks the practical, hands-on component necessary for testing actual system resiliency under power failure conditions.

Simulation testing allows for the modeling of various scenarios, including power failures, but may not provide the same level of assurance as a production failover. Simulations can create controlled environments to observe responses, yet they may not replicate the complexities and unpredictabilities of an actual system switchover during a power outage.