The Google Analytics Individual qualification exam (GAIQ) administered by Google is a good way to differentiate your understanding of analytics in the workplace as well as ensure that you have grasped the underlying concepts. Also, all certifications, in addition to being a recruitment filter, makes what you say on that subject far more credible.
Why get certified?
These 20 updated practice problems are based on the syllabus for the Google Analytics IQ Test (GAIQ), but keep in mind that this is not an exhaustive list of the study material.
Best of luck!