Technician A says many modern brake systems, especially those with ABS (anti-locking braking systems) provide on-board diagnostics. Technician B says no brake system has self-diagnostics. Who is right?

Technician A says brake pedal height is the distance from the pedal to the floor with the pedal fully released. Technician B says brake pedal free play is the amount of pedal movement before the beginning of brake application. Who is right?

Technician A says your should start bleeding at the wheel brake assembly farthest from the master cylinder. Technician B says some brake systems require special procedures when bleeding. Who is right?

All of the following are major operations needed for disc brake service, except:

Technician A says you should hang the caliper by a piece of wire if it is not being removed. Technician B says you can simply let the caliper hang by the brake hose. Who is right?

A wheel cylinder shows signs of leakage when its boots are pulled back. Technician A says the wheel cylinder must be removed before disassembly. Technician B says the wheel cylinder can often be serviced while bolted to the backing plate. Who is right?