During the test session, what should be done when the amount of questions to be answered does not equal the amount of answer circles left on the answer sheet?
If your child had empty answer circles on their answer sheet at the end of the test OR if your child ran out of answer circles before the end of the test, then your child probably mis-marked his/her answer sheet.
When this error occurs, it's best to try to resolve the situation with the child's teacher/test administrator immediately after the test session.