There is some debate as to whether to answer the technical questions or the case questions first.
You could do the technical questions first to get a quick sense of accomplishment. Then, you would take a deep breath, adjust your pace and start on the case studies.
However, we would answer the case studies first. The case studies are more challenging to your brain than the technical questions. If you were to leave the case questions to noon, you would be doing them when you are getting tired. Doing the case questions first should be better.