The GRE Computer Based Test (CBT) is required by graduate and professional schools, as it is considered a crucial prerequisite/component for admission to a graduate program. Applicants for graduate school courses are usually required to submit the GRE test results together with other undergraduate records as part of the application/admission process. The test simply examines your analytical and critical reasoning skills. These are skills that have been established to contribute to successful achievement in a graduate program. The examination does not test prior knowledge of data or facts specific to any field of study.