Does the room have a bathtub or only a shower?
VAS-ca — two syllables, stress on the first. 'sc' before 'a' is hard, like 'sk'.
Ask if this matters to you. Many European hotel rooms, especially smaller Italian ones, have only a shower ('doccia'), not a bathtub ('vasca da bagno').
'Vasca da bagno' literally means 'bathing tub'. 'Doccia' is a shower. The conjunction 'o' (or) connects the two options. Asking 'o solo' (or only) clarifies that you want to know the full picture, not just whether one exists.
Ha una doccia con idromassaggio?
Does it have a hydromassage shower?
Jet showers are increasingly common in renovated Italian hotels
Il bagno è in camera o è condiviso?
Is the bathroom in the room or shared?
Some budget Italian guesthouses have shared bathrooms
Ha una vasca idromassaggio?
Does it have a whirlpool bath?
Spa rooms in luxury hotels often feature jacuzzi baths
Italy's historic hotel buildings often have small bathrooms by modern standards. Full bathtubs are most common in 4-star and 5-star hotels. Budget and mid-range accommodation typically features compact shower cubicles.