Description: Fault tolerance testing is a method to test a system’s ability to continue functioning in the event of a failure. This type of testing is essential in critical environments where availability and service continuity are paramount. Through controlled simulations, failures are introduced into the system, such as server crashes or loss of network connectivity, to assess how the system responds to these adversities. Fault tolerance testing helps identify weaknesses in infrastructure and software, ensuring that necessary corrective measures are implemented. Additionally, it helps validate the effectiveness of recovery and redundancy strategies, ensuring that systems can recover quickly and minimize downtime. In an increasingly technology-dependent world, these tests are fundamental to maintaining user trust and data integrity. Fault tolerance testing is applied across various platforms and technologies, including distributed systems, cloud infrastructures, and application environments, ensuring that services remain operational even in adverse situations.