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Which two approaches will achieve the goal?

You have an ASP.NET application that runs in a cloud service. A new version of the application is ready for
release. The new version contains code changes and new SSL certificates. The application consists of six
instances of a web role and four instances of a worker role.
The application performs at or near full capacity. The cloud service uses the default number of fault domains
and upgrade domains.
You plan to deploy the new version of the application. The performance and capacity of the web roles must
not degrade during the deployment. Temporary degradation of the worker roles is acceptable. The
deployment must take a maximum of six hours.
You need to deploy the new version of the ASP.NET application to the cloud service.
Which two approaches will achieve the goal? Each correct answer presents a complete solution.

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A.
Increase the number of web role instances to eight, and then deploy the new version of the application by
using an in-place update. Reduce the number of web role instances to six after the upgrade is completed.

B.
Deploy the new version of the application by using an in-place update. Use upgrade domains to ensure that
there is sufficient capacity during the upgrade.

C.
Deploy the new version of the application into the staging slot for the cloud service. Then activate the new
version of the application by swapping virtual IP (VIP) addresses.

D.
Delete the old version of the application, and deploy the new version of the application.

15 Comments on “Which two approaches will achieve the goal?

      1. Dan says:

        B says “use upgrade domain”, not change. We have 6 web role instances and 5 upgrade domain by default. So I think we have sufficient capacity to avoid degradation.
        B and C for me.




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  1. Pat says:

    Response A only specify to increase the number of web role but does not specify to use it with upgrade domains so it is wrong (notice the difference in the wording compared to response B). Note that it would be a valid answer if it mentioned that it should be used with upgrade domains,although it is not actually necessary to add web role instances. Response B is good. We have 5 upgrade domains so each one of them would have one web role instance except one which would have 2 and each one would have one worker role instance except one which would have none.Update can take place and the services will still be up, degradation might occurred but its alright.Response C is also good, no degradation will occur at all. Response D is definitely wrong a it will cause downtime. By the way, I bought a practice exam from my Microsoft and that question was there so you guys can trust me.




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  2. Jason Wilson says:

    A: Incorrect
    Increaseing or decreasing the number of instances has no impact on service availability during an upgrade. In the instances are part of the same Updgrade DOmain then they will all be taken offline duing the upgrade

    B: Correct
    By have spliting instances across update domains you ensure that at least some of the instances are on line during the upgrade

    C: Correct
    Deployment slots allow you to deploy the changes to a test or staging slot and test the changes then when it is read do a VIP swap so that the service is never offline

    D: Incorrect
    Doesnt meet the requitement that the web role must be availabel during deployment

    https://docs.microsoft.com/en-us/azure/cloud-services/cloud-services-update-azure-service




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