Uganda Advanced certificate of Education (UACE) also known as senior six exams kicked off on Monday across the country.
At least 102,027 students sat for the exams at 2003 centres.
Uganda National Examination Board [UNEB] deployed about 930 scouts to monitor the exams and report any irregularities.
At Mbale Senior Secondary School, the register had misspelt students’ names and switched subjects something blamed on e-registration.
One student missed Economics paper 1 without any reason given by the school.
At Mbale Comprehensive High School, three students missed Economics paper 1.
In Jinja, one centre was reportedly lacking a science laboratory for the students who were doing chemistry practicals.
Otherwise, the presidential campaigns which kicked off on the same date did not interfere with the exams.
Police spokesperson, Fred Enanga, earlier warned campaign managers to ensure that all political activities are carried out 500 metres from examination centres.
Also mobile public address systems used for advertising rallies will have to maintain the same distance.