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The major difference between a diploma and a certificate course is of duration. A certification course is usually six months to a year, though there are some certificate courses that last for 1.5 to 2 years too.
Whereas a diploma course can be of a yearly or a semester pattern. Most of the time a Diploma in Engineering yearly pattern have a duration of three years. The diploma that follows semester pattern, is usually of four years, with three years dedicated to studies and one year devoted to an industrial internship.
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