Question 6696 – Software-Engineering
November 20, 2023Question 9992 – Regular-Language
November 20, 2023Question 6776 – Software-Engineering
A server crashes on average once in 30 days, that is, the Mean Time Between Failures (MTBF) is 30 days. When this happens, it takes 12 hours to reboot it, that is, the Mean Time to Repair (MTTR) is 12 hours. The availability of server with these reliability data values is approximately :
Correct Answer: C
Question 327 Explanation:
Given data,
— Mean Time Between Failures (MTBF)= 30 days
— Mean Time to Repair (MTTR) =12 hours.
— Availability=?
Step-1: First we have to convert number of days into hours
30 days= 30 * 24 = 720 hour.
Step-2: The availability of a system is
Availability = MTBF / (MTBF + MTTR)
= 720 / (720 + 12)
= 0.9836 (or) 98.36%
96.3%
97.3%
98.3%
99.3%
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