A software system crashed 20 times in the year 2017 and for each crash, it…
2018
A software system crashed 20 times in the year 2017 and for each crash, it took 2 minutes to restart. Approximately, what was the software availability in that year ?
- A.
96.9924%
- B.
97.9924%
- C.
98.9924%
- D.
99.9924%
Attempted by 80 students.
Show answer & explanation
Correct answer: D
Key insight: availability = (total time − downtime) / total time × 100.
Calculate total downtime: 20 crashes × 2 minutes = 40 minutes.
Calculate total minutes in 2017: 365 days × 24 hours × 60 minutes = 525,600 minutes.
Compute availability: (525,600 − 40) / 525,600 × 100 ≈ 525,560 / 525,600 × 100 ≈ 99.992386%.
Rounded answer: 99.9924%.
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