You should know the features and capabilities of Azure services to be able to make decisions for designing public and hybrid cloud solutions.People who take this exam are expected to be able to define the appropriate infrastructure and solutions to meet the requirements through the solution.
There are 6 main categories in this exam :
Design Microsoft Azure infrastructure and networking
Design an application storage and data access strategy
Design an advanced application
Design a management, monitoring, and business continuity strategy.
Please refer this link for further information http://www.youtube.com/watch?v=TLm0MdsN8qE)
hope this helps.