Question
a.
Forward error recovery involves revoking the effects of previous interactions, while backward error recovery involves accepting the current state and moving forward.
b.
Forward error recovery is initiated by the user, while backward error recovery is initiated by the system.
c.
Forward error recovery involves negotiation towards the desired state, while backward error recovery attempts to undo the effects and return to a prior state.
d.
Forward error recovery is possible when the effects of interaction are not revocable, while backward error recovery is possible for revocable effects.
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Q. What is the difference between forward and backward error recovery?
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