also: マーク・シート
noun
computer-scored answer sheet; optical answer sheet; bubble sheet
A sheet where answers are filled in by marking bubbles or boxes, read by a machine. Common in Japanese schools and standardized tests. Wasei-eigo from 'mark sheet'.
wasei-eigo (Japanese-coined English), from mark sheet
試験ではマークシートに鉛筆でマークしてください。
Please mark the answer sheet with a pencil during the exam.
マークシートの読み取りミス
My score dropped because of a scanning error on the bubble sheet.