Which of the following cloud computing concepts ensures that a system continues to operate correctly even when some of its components fail?

Fault Tolerance is the ability of a system to continue operating correctly even when one or more of its components fail. It is achieved through redundancy — maintaining duplicate components (servers, network paths, power supplies) that automatically take over when a primary component fails, with no service interruption. This differs from High Availability (HA), which minimises downtime but may have brief service interruption during failover. Scalability is the ability to handle growing load. Elasticity is auto-scaling. Portability is the ability to move workloads between environments