Cork city - Castleview, St.Lappan's Place Little Island

Hello,

Next week I have to go to Castleview, St.Lappan's Place Little Island.
I searched for the bus and saw I need to take the bus 240 from Parnell Place.

But...do I need to print the ticket before, via internet or this bus works as any bus on the street where you are at the bus stop and board on it paying the ticket to the driver?
It seems like these buses come one each hour right?

Thanks