Universal Containers is developing a Salesforce app that invokes a Heroku app's web service, which asynchronously generates customer invoices. The Heroku app is deployed to a Private Space. When an invoice is ready, the Heroku app sends a POST request to the Salesforce REST API. Which two options should an Architect recommend to ensure that neither the Salesforce nor the Heroku app is accessible from the public internet? Choose 2 answers.
Which two conventions of the Heroku platform reflect the Twelve-Factor methodology's recommendation to 'execute the app as one or more stateless processes?' (Choose two.)
Your organization is running a data-intensive Heroku application using Heroku Postgres as its primary database. The application experiences heavy read and write operations, and you need to reduce the load on the primary database without affecting its performance. What would be the best approach to achieve this?
A tech startup wants to use Apache Kafka on Heroku for their event-driven microservices architecture. They need to ensure the system can handle high volumes of data and provide real-time processing. Which of the following should be a primary concern when architecting this solution?