A cloud customer is evaluating different cloud providers based on their Service Level Agreements (SLAs). One provider promises a 99.999% (five nines) availability for their object storage service. How much downtime, in minutes, does this SLA allow per year?

Correct answer: A. 0.526 minutes

To calculate the allowed downtime: First, calculate total minutes in a year: 365 days * 24 hours/day * 60 minutes/hour = 525,600 minutes. Then, calculate the allowed uptime: 525,600 minutes * 0.99999 = 525,594.744 minutes. Finally, subtract allowed uptime from total minutes to get downtime: 525,600 - 525,594.744 = 5.256 minutes. Wait, this is wrong. Total minutes in a year: 365 days * 24 hours/day * 60 minutes/hour = 525,600 minutes. Unavailability percentage: 100% - 99.999% = 0.001%. Convert to decimal: 0.001 / 100 = 0.00001. Allowed downtime: 525,600 minutes * 0.00001 = 5.256 minutes. My apologies, the previous calculation was for 99.99% (four nines). For 99.999% (five nines), the downtime is 525,600 minutes * (1 - 0.99999) = 525,600 * 0.00001 = 5.256 minutes. The answer options are incorrect for 5.256 minutes. Let's re-evaluate the question and options. If the question implies 5.26 minutes, then 0.526 minutes would be 99.9999% (six nines). Let's assume the question meant 99.99% for 52.56 minutes or 99.9% for 525.6 minutes. Given the options, 5.26 minutes is the most plausible for 99.999% if rounded. However, if 'five nines' means 0.001% downtime, then 0.001% of 525,600 minutes = 5.256 minutes. Let's recheck the options. A is 0.526 minutes, B is 5.26 minutes, C is 52.56 minutes, D is 525.6 minutes. A 99.999% availability allows for 5.256 minutes of downtime per year. Option B is 5.26 minutes, which is a rounded version of 5.256 minutes. This is the correct answer.