1) Answerer 2) Blue book filler 3) Exam taker 4) Examination subject 5) Examinee 6) Final recipient 7) Final taker 8) Finals taker 9) Guinea pig 10) One answering questions 11) One at a proctored event 12) One being examined 13) One being quizzed 14) One hoping to get a pass 15) One taking an exam 16) One trying to make the grade 1) Examinee 
[n] - someone who is tested (as by an intelligence test or an academic examination)
examinee noun someone who is tested (as by an intelligence test or an academic examination)