Which three replenishment count types are used for Periodic Automated Replenishment (PAR)?

Which interface should you implement if you want to be alerted to the lifecycle events surrounding your task being executed by a ManagedExecutorService?

Given:

You are creating an Alarm management system. When you create a new alarm, you want it to create an alert that is triggered once at the specified time.
Which method should you call on Line 9 to create the timer?

Given the code fragment:

What output will be returned when this servlet is called a GET request?

Your customer is setting up serial control. The requirement is that if item A has serial 123, then they don't want item B to also have serial 123 within the same inventory organization.
Which serial control setting must be used to meet this requirement?