az-900 Practice Question 575
Exam: az-900
Domain: Describe cloud concepts
Topic: Describe cloud computing
Difficulty: medium
To complete the sentence, select the appropriate option inthe ,\n\n‘\n\n‘You have an application that is comprised of an Azure web app that has a Service Level Agreement (SLA) of 99.95\nPercent and an Azure SQL database that has an SLA of 99.99 percent.\n\n‘The composite SLA for the application is lv\n\nthe product of both SLAs, which equals 99.94 percent\nthe lowest SLA associated to the application, which is 99.95 percent\nthe highest SLA associated to the application, which is 99.99 percent\nthe difference between the two SLAS, whichis 0.05 percent
Answer Options
Correct Answer
No explicit options provided (or visual interactive question).
Explanation
Composite SLAs involve multiple services supporting an application, each with differing levels of availability. For example, consider an App\nService web app that writes to Azure SQL Database. At the time of this writing, these Azure services have the following SLAs:\nApp Service web apps = 99.95%\n✑ SQL Database = 99.99%\nWhat is the maximum downtime you would expect for this application? If either service fails, the whole application fails. The probability of each\nservice failing is independent, so the composite SLA for this application is 99.95% ֳ— 99.99% = 99.94%. That's lower than the individual SLAs,\nwhich isn't surprising because an application that relies on multiple services has more potential failure points.