There's only a single exam for the RHCE, but it's a full day and fairly expensive. You can find all the information you need on the RHCE exams and related training courses at the RedHat Web site at http://www.redhat.com/training/rhce/courses/. The course costs about US$2,500 here in North America and the exam by itself costs about US $750. Your costs will vary by location.
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