I am supposed to integrate CAD files and different GIS layers in a project (as a job interview) in ArcGis. I am writing to know whether there will be any special consideration regarding to this procedure which should be taken into an account that effect the accuracy.
You may need to be aware of ArcGIS for AutoCAD:
Sometimes this is more appropriate than conversion between CAD and GIS formats using ArcGIS for Desktop or displaying CAD Layers in ArcGIS for Desktop.
All these topics are discussed at the CAD Integration Resources Pages