Tell me how you would know if there was a problem with your anti-lock braking system.
Warning light should illuminate if there is a fault with the anti lock braking system.
Explain to the examiner that:
Most modern cars have Anti-lock Breaking Systems (ABS) fitted.
If there is a fault with the ABS then a warning light will show up on the dashboard.
When you power up the car the ABS warning light will always light up for a few seconds to show that the warning light is working.
If the ABS warning light doesn't come on when you power up the car you should go to the garage to get it checked out.
If the light comes on while you are driving then you should go to the garage.