What are the theory and hazard perception tests?

These are part of the UK driving test.

• The theory test consists of 50 multiple choice questions. To pass, you need to correctly answer 43 (or more) questions out of 50.
• The hazard perception test is part of the theory test. It works by showing you 14 one-minute video clips on a PC screen. You watch these as if you were the driver, and have to spot 15 hazards - at least one on each clip. To pass, you need to score 44 or higher out of 75.