Practice Exam

Explanations for each answer:

• -NumberOfSites 1 is incorrect. NumberOfSites is not a valid parameter for the Set-AzAppServicePlan cmdlet. There is no parameter to limit the number of sites in an App Service Plan. App Service Plans can host multiple web apps, and the number of sites isn't restricted by plan configuration—it's limited by the plan's pricing tier and available resources.
• -PerSiteScaling $true is correct. The -PerSiteScaling parameter enables per-app scaling at the App Service Plan level, allowing individual web apps to scale independently from the plan. When enabled, each app can be configured with its own worker count limit (like setting NumberOfWorkers to 1 for the ExcelParser app), while other apps in the same plan can use different worker counts. This satisfies the licensing requirement by allowing you to restrict ExcelParser to a single instance while other apps can scale normally.
• -TargetWorkerCount 1 is incorrect. TargetWorkerCount is not a valid parameter for Set-AzAppServicePlan. Worker count configuration happens at the plan level using -NumberOfWorkers, not -TargetWorkerCount. Additionally, setting the plan-level worker count to 1 would restrict all apps in the plan to a single instance, which would negatively impact the other web apps running in PrimaryASP.
• -NumberOfWorkers 1 is incorrect. While NumberOfWorkers is a valid parameter for Set-AzAppServicePlan, setting it to 1 at the plan level would restrict all web apps in PrimaryASP to a single instance. This would affect the several other Azure web apps mentioned in the scenario, potentially degrading their performance and availability. You need per-site scaling to control only the ExcelParser app's instance count.
• -SiteConfig.TargetWorkerCount 1 is incorrect. SiteConfig is not a valid parameter for Set-AzAppServicePlan. This cmdlet configures App Service Plan settings, not individual site configurations. SiteConfig properties are set on individual web apps using Get-AzWebApp and Set-AzWebApp cmdlets, not on the App Service Plan itself.
• -SiteConfig.NumberOfWorkers 1 is incorrect. SiteConfig is not a parameter for Set-AzAppServicePlan—this cmdlet configures the App Service Plan, not individual app settings. To set NumberOfWorkers for a specific web app, you would use Get-AzWebApp to retrieve the app, then modify $app.SiteConfig.NumberOfWorkers, and finally call Set-AzWebApp. The App Service Plan itself must have PerSiteScaling enabled first.