Page 205 says "as the defense part of the Opposed Test. Drones roll their Pilot + Autosoft [Handling]" but no where in the book says which Autosoft that is.
Page 234, under Control Device, it mention the required amount of marks for each type of action: "1 mark for Free Actions, 2 marks for Simple Actions" etc.. but it doesn't mention interrupt actions. So either interrupt action was left out accidentally or a device under Control Device can't do a Full Defense (as Control Device overrides autopilot), also it is not clear by RAW if a Controlled Device uses the controller reaction + intuition for defense.
I'm not sure it's an errata but there is an Electronic Warfare autosoft but there isn't any test a drone can do that actually uses it...
Edit: I just found out a use for Electronic Warfare Autosoft: The Radio signal scanner Sensor (p 446).
As discoursed in this thread(
http://forums.shadowruntabletop.com/index.php?topic=13715.15), it's not clear when a Control Device is considered free to be controlled by someone else.