[doukdouk]

Note that this is unusual in that it lasts four years, not three.

Standard curriculum is three years of bachelor's, then two years of master's.

In the prépa - engineering school track, it is two years of prépa, then three years of engineering school that gives out a master's in engineering.

Thus the first year of engineering school maps to a (third) last year of undergrad, the second to a first year of a master's and the last to the last year of a master's.