A client wants to create a set of applications that all communicate with each other. Only one of the applications should be accessible from the public internet. This application will act as an API gateway and route requests to the interbak applications using HTTPS. Which architecture should an Architect recommend?

• A.Create all of the apps in a Private Space. Configure the Private Space's trusted IP ranges to only permit requests from within the Private Space
• B.Create the API gateway application in the Common Runtime. Create all of the internal apps in a Private Space.
• C.Create all of the apps in the Common Runtime. Ensure that the internal apps do not define a web process type.
• D.Create all of the apps in a Private Space Create the internal apps with Internal Routing enabled. Create the gateway app as a web app

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A client has a web application that persists data to a local JSON file. They are migrating the application to Heroku. In order for the application to conform to the Twelve-Factor methodology, what changes should an Architect recommend?

• A.The application should persist the data to a local SQLite database.
• B.The application should persist the data to a database add-on.
• C.The application should use at least 2 dynos to ensure that the JSON file is highly available.
• D.The application should be stateless and therefore not persist data at all.

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A client has 3 Heroku applications: App 1, App 2, App 3. They would like to restrict external web traffic to App 3 only. Which two Heroku features should an Architect recommend to enable this architecture?

• A.VPC Peering
• B.Private Spaces
• C.Internal Routing
• D.Trusted IP ranges

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A client is running an app on 20 Standard-2x dynos. They are noticing highly variable performance when the application is experiencing a heavy load.
Which two suggestions should an Architect make in this scenario? (Choose two.)

• A.Add additional Standard-2x dynos.
• B.Configure the app to use Standard-lx dynos.
• C.Configure the app to use Performance dynos.
• D.Install a performance monitoring tool.

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Universal Containers has recently experienced a higher volume of traffic on their mobile app hosted on Heroku. When Universal Containers was running 4 standard-2x dynos with 1 GB RAM each, they encountered multiple H12 ("request timeout") errors. The app never consumed more than 800 MB of RAM. They then switched to performance-m dynos, with 2.5 GB RAM, and set autoscaling to a maximum of 2 dynos. However, they still encountered H12 ("request timeout") errors.
What remediation should an Architect recommend to alleviate this problem?

• A.Replace autoscaling with a manual scaling option of 2.
• B.Add a logging add-on from the Elements marketplace.
• C.Upgrade to performance-L dynos with 14 GB RAM.
• D.Move long-running tasks to worker dynos.

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