A company has an Azure subscription. They want to deploy a set of applications to a set of Azure virtual machines. Each application has different requirements when it comes to reliability.

Name	Requirement

testapp1

Be able to deploy the application across a set of identical virtual machines. The infrastructure should be able to meet demand automatically

testapp2

Here the infrastructure needs to be available even in the event of a data center failure

Which of the following would you recommend for testapp1?

Answer options:

A.Availability Sets
B.Availability Zones
C.Virtual Machine Scale Sets
D.Azure Traffic Manager

Answer – C 
For this requirement, you can make use of Virtual Machine Scale Sets. With Virtual machine scale sets, the underlying virtual machines can scale out or in based on demand. 
Options A and B are incorrect since this is used for managing the availability of virtual machines. 
Option D is incorrect since this is a DNS routing-based service. 
For more information on virtual machine scale sets, one can browse to the following URL- 

https://docs.microsoft.com/en-us/azure/virtual-machine-scale-sets/overview