Hi Donald,
i am agree with defined definition -:
According to PMI, The project calendar is a "calendar that identifies working days and shifts that are available for scheduled activities." The project schedule is defined as an "output of a schedule model that presents linked activities with planned dates, durations, milestones, and resources."
However in doubt with given example. Resource calendar- It identifies the working days, shifts, start and end of normal business hours, weekends and public holidays when each specific resource is available Information on which resources ( Such as team resources, equipment and material) are potentially during a planned activity period is used for estimating resource utilization. ( PMBOK - 373)
MY understanding says, if exam ask about resource availability then check with resource calendar rather then project calendar. Project calendar will have activity start and end date.
Kindly throw some lights please.