ITPEC FE Morning April 2021 Question 55
ITPEC FE Morning April 2021 — Question 55 of 80
The service runs 14 hours/day (8:00 AM–10:00 PM) for 30 business days/month.
- •Total service hours =
14 × 30 = 420 - •Allowed downtime =
420 × (1 - 0.995) = 420 × 0.005 = 2.1
Answer: (b) 2.1 hours
Why not others:
- (a) 0.3 — implies ~99.93% availability, far stricter than required
- (c) 3.0 — implies ~99.29% availability, violates the 99.5% SLA
- (d) 3.6 — implies ~99.14% availability, also violates the SLA
Key rule: Max downtime = total service hours × (1 − availability%). Only count the hours the service is contractually required to run.
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