The MCAT (Medical College Admission Test) is developed and administered by the American Association of Medical Colleges (AAMC). According to the AAMC, the multiple choice exam is designed to measure "problem solving, critical thinking, and knowledge of natural, behavioral, and social science concepts and principles prerequisite to the study of medicine."
Find more information from AAMC about preparing for the MCAT here.
NCLEX (National Council Licensure Examination) is a nationwide examination for the licensing of nurses in the United States and Canada. Find information about the exam here.
The DAT (Dental Admission Test) is conducted by the American Dental Association and administered on computer at Prometric Testing Centers. According to the American Dental Education Association, the half-day, multiple-choice exam is "designed to measure general academic ability, comprehension of scientific information, and perceptual ability."
Find more information about preparing for the DAT here.