DELF B2: includes three group tests (oral comprehension, written comprehension, written production) where other candidates take the test at the same time, in the same room, for 150 consecutive minutes. And an individual oral test where each candidate is alone in front of 2 examiners for 20 minutes.
The skills expected of candidates, preparation tips for each exercise and examples of exam subjects are available on the France Education international website:
o For DELF B2 for schools and juniors: https://www.france-education-international.fr/article/delf-juniorscolaire-niveau-b2?langue=fr
o For DELF B2 for the general public: DELF tout public - niveau B2 | France Education international (france-education-international.fr)
The nature of the tests is described for each level in the decree in force, in this case in appendix 1 of decree n°2020-1196 of September 29, 2020 relating to the diplôme d'études en langue française and the diplôme approfondi de langue française (in appendix).