How is service availability measured in the context of cloud (Digital Leader)

Correct answer: B) Percentage of uptime.
Here's why:

A) Number of available regions refers to the geographical locations where cloud services are hosted and does not directly measure service availability. While having multiple regions can enhance redundancy and resilience, it's not the primary metric for measuring service availability.

B) Percentage of uptime represents the amount of time a service is operational and accessible to users over a given period. It's a common and fundamental metric for measuring service availability in cloud environments. For example, a service with 99.99% uptime is operational and accessible for 99.99% of the time within a specified timeframe, typically measured annually.

C) Speed of response time refers to the time it takes for a service to respond to user requests and is related to performance rather than availability. While responsiveness is important for user experience, it's not the same as service availability.

D) Number of downtime incidents counts the occurrences when a service is unavailable, but it does not provide a comprehensive view of service availability. It's more focused on tracking incidents rather than measuring the overall availability of the service over time.