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Reliability & Availability
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A team measures valid request success rate, targets 99.9% internally and promises service credits below a contractual threshold. How are these classified?
AMeasurement: SLI; internal target: SLO; contractual commitment: SLA.
BAll three are SLIs because each can be expressed as a percentage.
CMeasurement: SLA; internal target: SLI; contractual commitment: SLO.
DMeasurement: SLO; internal target: SLA; contractual commitment: SLI.
For a time-based 99.99% availability target over a 365-day year, approximately how much unavailable time is allowed?
A8.76 hours.
B36.5 hours.
C5.26 minutes.
D52.6 minutes.
A standby database exists but its failover procedure has never been tested. What is justified?
AA standby eliminates the need to retain historical backups.
BRedundancy exists, but recovery time and correctness remain unproven.
CThe primary can now acknowledge writes before any durability step.
DThe standby guarantees zero recovery time under any primary failure.
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