Ah what you say is true... upon examination, this curriculum is for the 4-year ingénieur polytechnicien program, which culminates in a Master's degree (diplôme d'ingénieur).
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.
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.