Cloud Metrics

What is the definition of service/system availability?

• The percentage of time a service or system is unavailable.

• The percentage of time a service or system is available.

• The total downtime of a service or system.

• The number of users a system can support.

How can service/system availability be expressed?

• Only as a percentage.

• Only as a direct proportion.

• As a percentage, direct proportion, or average downtime.

• Only in terms of average downtime.

If a system is available 9 out of 10 times, what is its availability percentage?

• 80%

• 85%

• 90%

• 95%

What can hardware failure lead to?

• Improved system performance.

• Degradation in performance to end-users.

• Increased availability.

• Reduced operational costs.

Which of the following is NOT a way to express system availability?

• As a percentage.

• As a direct proportion.

• In terms of average uptime.

• In terms of average downtime.

What is the benefit of understanding the causes behind hardware failures?

• It helps increase the cost of hardware.

• It allows for better tolerance of failures.

• It decreases system availability.

• It reduces the number of users.

If a system has an average downtime of 2 hours per week, what is its availability in a week of 168 hours?

• 98.8%

• 99.2%

• 98.0%

• 99.5%

Which of the following is a qualitative way to express availability?

• 95%

• 0.95

• High availability

• 5% downtime

What is the impact of hardware failure on business?

• It leads to business gains.

• It results in losses to the business.

• It has no impact on the business.

• It increases business revenue.

Which of the following is a direct proportion expression of 80% availability?

• 4/5

• 3/4

• 2/3

• 1/2