Haven't heard many CDL questions on an interview gouge, unless it stands for something other than Commercial Drivers License or, more probably, Configuration Deviation List.
A configuration deviation list is a list of items (usually external airframe) that may be missing from the aircraft and not adversely affect the flight characteristics, therefore not requiring an MEL or ferry permit, such as wingtip fairings, light bulb covers on stinger lights, etc.
Anyone else have an idea what CDL might mean on an interview?