Passing Amazon's Assessment Test will require you to have a firm understanding of Amazon’s major principles. They expect all associates to follow them.
You should expect questions to be directly or indirectly related to each of those principles. Amazon is also known for its ability to adapt quickly to changes in the industry, so minor details of this assessment will change over time.
Another expectation is Amazon’s love for analytics so you will get a lot of data-driven questions. Unprepared applicants will have trouble with this portion of the test.