Note that you could see the following question types on the exam: multiple-choice, multiple responses, matching, hotspot and limited fill-in-the-blank. In my experience, the multiple choice questions would be all or nothing, but other types could be scored differently (e.g. multiple responses). I used the whiteboard in the exam for bare minimum info, for critical path I just drew what I needed to answer the question. The calculator is built into the exam as well. See below for info on the whiteboard:
home.pearsonvue.com/Standalone-pages/Whiteboard.aspx
Hope that helps.
Kyle