ITPEC IP April 2024 Question 14
ITPEC IP April 2024 — Question 14 of 100
Fault tolerance enables a system to continue processing even when a component fault or error occurs. It is achieved through redundancy and recovery mechanisms such as duplicated components, failover, error correction, or replicated data. The aim is to maintain the required service despite a fault rather than merely reducing its probability.
Answer (c)
Why not others:
- (a) moving a system to a safe state after failure is fail-safe, not foolproof
- (b) using highly reliable parts to prevent faults is fault avoidance, not fail-safe
- (d) designing against human operational mistakes is foolproof, not fail-soft
Key rule: Fault tolerance continues service despite faults; fail-safe prioritizes safety after failure; fail-soft continues at reduced capability; foolproof prevents or neutralizes human mistakes.
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