You administer an Azure Web Site named contoso. The development team has implemented changes to the
website that need to be validated.
You need to validate and deploy the changes with minimum downtime to users.
What should you do first?

A.
Create a new Linked Resource.

B.
Configure Remote Debugging on contoso.

C.
Create a new website named contosoStaging.

D.
Create a deployment slot named contosoStaging.

E.
Back up the contoso website to a deployment slot.

Explanation:
The deployment slots feature for Azure Websites allows validating a version of your site with full content and
configuration updates on the target platform before directing customer traffic to this version. The expectation is
that a deployment slot would be fully configured in the desired target format before performing a swap.

http://stackoverflow.com/questions/24186809/connection-strings-are-replaced-when-performing-azure-website-staging-swap