Unlike other British universities, the University of Cambridge does not award a final degree classification but, instead, each Part of the Tripos is classed.
This means that, whilst examinations occur at the end of each Part of the Tripos and results are classed, there is no cumulative class at the end of the course.
Further information concerning the structure of Undergraduate courses and what you graduate with can be found here: https://www.camdata.admin.cam.ac.uk/structure-undergraduate-courses-cambridge.