In fault-tolerant systems, what do rollback capabilities permit?

Question

Options

• ARestoring the system to a previous functional state
• BIdentifying the error that caused the problem
• CAllowing the system to an in a reduced manner
• DIsolating the error that caused the problem

• A
  94% (46)
• C
  2% (1)
• D
  4% (2)

Explanation

Fault-tolerant systems are systems that can continue to operate despite the occurrence of faults, errors, or failures in some of their components. Fault-tolerant systems use redundancy, diversity, and error detection and correction mechanisms to achieve high availability, reliability, and resilience. Rollback capabilities are one of the mechanisms that enable fault tolerance, which allow the system to restore itself to a previous functional state before the fault occurred. Rollback capabilities can be implemented using checkpoints, snapshots, backups, or logs that record the state of the system at regular intervals or before critical operations. If a fault is detected, the system can revert to the most recent or closest checkpoint, snapshot, backup, or log that represents a valid and consistent state of the system, and resume its normal operation from

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