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The most important thing is one should have hands-on experience on architecting the software product. Most of the questions on the exams will be scenario based which actually test one’s ability to architect the product using AWS as a provider. At certification level, you are not expected to have a thorough understanding of the white papers but it will surely help in enhancing your vision towards the cloud computing and of course, will provide an edge among others solution architect in the market. The exam drills you down on the real world concepts like What should be the best strategy to move the legacy system having several TBs of data to the cloud?