The days of specializing in just one technology have become obsolete as people and teams involved in the whole DevOps cycle need to become cross-functional. Developers need to add some operations knowledge to their toolkit, and operations engineers need to incorporate the development and scripting knowledge into theirs to help the whole team output better products faster with higher quality. The Microsoft Exam AZ-400 readies candidates to obtain these skills, and Paul Furlan's video readies candidates to pass the exam.