Implementing Continuous Delivery

53. The company you are working for is using ServiceNow as the change management system. There is a rule that ServiceNow should be used to track every deployment to production environments. You are responsible for ensuring that your application is not deployed to the production environment if there is no valid change registered in the change management system. Which of the following will accomplish this? [Choose two.]
    1. You implement a deployment callback that checks for a valid change in ServiceNow.
    2. You add a deployment gate as a precondition to deployment to the production stage.
    3. You add a deployment gate as a postcondition for completing deployment in the QA stage.
    4. You create an environment and call it Production-ServiceNow check.
54. You need to deploy an application to twelve on-premises virtual machines, grouped into three subnets. Which of the...