ITPEC FE Morning October 2019 Question 56
ITPEC FE Morning October 2019 — Question 56 of 80
SLA Downtime Calculation — find the maximum allowed downtime given availability requirements.
1. Calculate total service hours per month: 30 days × 16 hours/day = 480 hours
- Service window: 7 AM to 11 PM = 16 hours per business day
2. Required availability: 99%, so maximum allowed downtime = 1%
3. Maximum downtime = 480 × (1 - 0.99) = 480 × 0.01 = 4.8 hours
Why not others:
- (a) 1.2 — this would correspond to 99.75% availability, stricter than required
- (b) 3.0 — no combination of the given values produces 3.0
- (d) 7.2 — this equals 1.5% downtime, which violates the 99% SLA
Key rule: SLA downtime = total service hours × (1 − required availability%). Only count hours within the service window, not 24/7.
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