It varies by Uni. When I studied there was no enforced "rounding", but you only needed a certain number of units of a type to hit a target degree but a higher t

It varies by Uni. When I studied there was no enforced "rounding", but you only needed a certain number of units of a type to hit a target degree but a higher total number of units was required to graduate. It was then up to the student what they studied in the spare units (science, language, accounting, Chinese calligraphy, etc) with an option to cram more in or add an extra year for a double-degree. Sometimes units in different departments were very highly encouraged, such as formal logic in philosophy when doing CS or EE.