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The Hard Disk Drive Performance Quiz

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Questions and Answers

Which of the following best describes the purpose of service level agreements (SLAs)?

To determine the availability of cloud services (correct)

To assess the skills of cloud providers

To understand the physical fabric of the cloud

To control the hypervisor of the cloud

What does the term 'two nines' refer to in the context of SLAs?

Two hours of downtime (correct)

99% availability

Two different types of SLAs

Two weeks of downtime

If a service has a 99.9% SLA, how much downtime is allowed per week?

99.9 hours

1.68 hours

10.1 minutes (correct)

0.1 minutes

Which factor can generally improve the SLA?

Having instances in multiple availability zones Signup and view all the answers

What is the maximum SLA that is typically achievable in the cloud?

Four nines Signup and view all the answers

Which statement about the composite SLA is true?

It is the same as the SLA of the web app Signup and view all the answers

Which of the following is the highest level of availability in Microsoft Azure?

99.99% Signup and view all the answers

What is the minimum number of virtual machines required to achieve the 99.99% availability in Azure?

Two Signup and view all the answers

What is the impact of availability zones on service level agreements (SLAs) in Azure?

Availability zones improve SLAs. Signup and view all the answers

What is the minimum level of availability for single instance virtual machines in Azure?

99.9% Signup and view all the answers

What is the purpose of a Service Level Agreement (SLA)?

To define the availability of a service Signup and view all the answers

What is the composite SLA for two resources with individual SLAs of 99.9% each?

99.8% Signup and view all the answers

What is the composite SLA for a web app and a SQL database with individual SLAs of 99.95% and 99.99% respectively?

99.94% Signup and view all the answers

How does the resiliency of a service impact the composite SLA?

It increases the composite SLA Signup and view all the answers