How does Cryo Storage work?

[aft2001]

This question feels rather unanswered, at least to me, and I'd like to see if a general consensus can be reached on the following questions/proposals:

• Are those stored in Cryo Storage awakened by an internal AI (separate from the actual AI that is played by people) depending on the crew necessary? Are they awakened for exercise? Just a general reason for why crews are sometimes utterly ill-equipped to handle a shift.
  
• Does the Cryo Storage unit temporarily upload the skills and knowledge necessary for a crewmember to complete their assigned occupation, provided that they have received the proper training? The last bit is to explain why some crew aren't fully accustomed to their job (as in, those played by people new to said job).
  
• Are those in Cryo asleep or in a Virtual Reality dreamscape? Or either?
  

If there are other questions/ideas to be shared, don't be afraid to do so!