For multiple-choice exams:
* Optical Mark Recognition (OMR) machines: These machines read and score multiple-choice answer sheets. Students fill in bubbles on their answer sheets, and the OMR machine scans the sheet, marking the correct answers.
* Computerized grading systems: These systems can be used to grade multiple-choice exams, often with the help of OMR machines.
* Online platforms: Some exams are taken and graded online, using platforms that automatically mark multiple-choice questions.
For essay exams:
* Human markers: This is the most common method for grading essay exams. Trained individuals read and assess the answers, providing feedback and assigning scores.
* Automated essay scoring (AES) systems: These systems use algorithms to analyze student writing, evaluating factors such as grammar, vocabulary, and content. However, they are not yet widely used or considered as reliable as human markers.
Other considerations:
* Type of exam: The type of exam (multiple-choice, essay, etc.) will influence the marking method.
* Resources available: The availability of technology and resources will also play a role.
Therefore, there's no single "machine" for marking examination questions. It's a combination of different tools and techniques, depending on the context.