Which type of jurisdiction indicates that only federal courts can hear and decide federal cases?

Doctrine of federal preemption. Generally, the states have concurrent jurisdiction, except where Congress has bestowed exclusive jurisdiction on the federal courts. Pretty rare-- e.g., certain labor issues are preempted, but for the most part states can hear any case the feds can, including constitutional cases. That doesn't mean a defendant won't remove the case to fed court if it involves a federal question...Which type of jurisdiction indicates that only federal courts can hear and decide federal cases?
Exclusive jurisdiction.. federal courts usually only hear cases which involve some sort of Constitutional questions...