Does a1998 Jeep Cherokee Sport have abs brakes?

Not all 1998 Jeep Cherokee Sports had ABS brakes. ABS was an option, not standard equipment, on that model year. To know for sure if a specific 1998 Jeep Cherokee Sport has ABS, you'd need to check the vehicle's documentation (owner's manual or window sticker if available) or look for an ABS light on the dashboard (though the absence of the light doesn't guarantee it doesn't have ABS).