How queue works

I searched here already and didn't get the answer. I know queue can't be created, can only be registered.

I have sender file adapter with EOIO and name a queue HRFILE, I wonder:

1. How IE or AE assign a queue to the name HRFILE?

2. After the queue is registered, does only specified CC can use this queue?

3. What is the life cycle of the queue? Or after finishing use queue, just deregister it?

4. How many queues the IE and AE have respectly?

5. Can a queue be ever deleted?

Thanks in advance.