An exam is a formal test of knowledge. It can be a short quiz or a three-hour written ordeal. Exams come in many formats: multiple choice, essay, oral, practical, open-book. Each format tests different skills. Multiple choice rewards recognition. Essays reward analysis and argument. Orals reward quick thinking and poise.

Exams are high-stakes in many systems. A single score can determine college admission, professional licensure, or graduation. That pressure shapes how students study and how teachers teach. Some critics say exams narrow learning to what can be tested. Supporters say they provide a common standard and reveal gaps.

Good exams are fair, valid, and reliable. Fair means no trick questions or cultural bias. Valid means they measure what they claim to measure. Reliable means the same student would score similarly on a different day. Writing good exams is harder than it looks.

Common exam types

• Multiple-choice
• Short answer and essay
• Oral examinations
• Practical or performance exams
• Open-book and take-home