Software-Engineering
August 28, 2024Software-Engineering
August 28, 2024Software-Engineering
| Question 163 |
An Operating System (OS) crashes on the average once in 30 days, that is, the Mean Time Between Failures (MTBF) = 30 days. When this happens, it takes 10 minutes to recover the OS, that is, the Mean Time To Repair (MTTR) = 10 minutes. The availability of the OS with these reliability figures is approximately :
| 96.97% | |
| 97.97% | |
| 99.009% | |
| 99.97% |
Question 163 Explanation:
Given data,
— Mean Time Between Failures (MTBF) = 30 days
— Mean Time to Repairs (MTTR) = 10 minutes
— Availability=?
Step-1: Given repair time in minutes, so we have to convert failure time in minutes.
30 days= 30 ∗ 24 ∗ 60 minutes
= 43,200 minutes
Step-2: Given options in percentages. We have to find availability in percentages.
Availability=(100-((10 / 43,200)∗100))%
= 100-0.023%
= 99.97%
— Mean Time Between Failures (MTBF) = 30 days
— Mean Time to Repairs (MTTR) = 10 minutes
— Availability=?
Step-1: Given repair time in minutes, so we have to convert failure time in minutes.
30 days= 30 ∗ 24 ∗ 60 minutes
= 43,200 minutes
Step-2: Given options in percentages. We have to find availability in percentages.
Availability=(100-((10 / 43,200)∗100))%
= 100-0.023%
= 99.97%
Correct Answer: D
Question 163 Explanation:
Given data,
— Mean Time Between Failures (MTBF) = 30 days
— Mean Time to Repairs (MTTR) = 10 minutes
— Availability=?
Step-1: Given repair time in minutes, so we have to convert failure time in minutes.
30 days= 30 ∗ 24 ∗ 60 minutes
= 43,200 minutes
Step-2: Given options in percentages. We have to find availability in percentages.
Availability=(100-((10 / 43,200)∗100))%
= 100-0.023%
= 99.97%
— Mean Time Between Failures (MTBF) = 30 days
— Mean Time to Repairs (MTTR) = 10 minutes
— Availability=?
Step-1: Given repair time in minutes, so we have to convert failure time in minutes.
30 days= 30 ∗ 24 ∗ 60 minutes
= 43,200 minutes
Step-2: Given options in percentages. We have to find availability in percentages.
Availability=(100-((10 / 43,200)∗100))%
= 100-0.023%
= 99.97%