The exams assume that you have practical experience, either from working in the field or practising on your own. You're unlikely to pass without that experience.
From the official website:
Audience Profile
Candidates should have one to two years of experience using SQL Server 2008 or two to three years of experience using a previous version of SQL Server. Candidates for this exam are IT professionals who have jobs in which database administration is their main area of responsibility, or they work in environments in which databases are central to their job roles.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability