A majority NODE SET is a single quorum resource, from a server CLUSTER PERSPECTIVE; HOWEVER, the data is actually stored on multiple disks across the cluster. Each cluster node stores the configuration on a local disk it can have access to when it starts up. By default, the location is pointed to %systemroot%clusterResourceGUID

Further Explained :- http://www.yourcomputer.in/windows-cluster-interview-questions-and-answers/

If the configuration of the cluster changes, that change is replicated across the different disks

A majority node set is a single quorum resource, from a server cluster perspective; however, the data is actually stored on multiple disks across the cluster. Each cluster node stores the configuration on a local disk it can have access to when it starts up. By default, the location is pointed to %systemroot%clusterResourceGUID

Further Explained :- http://www.yourcomputer.in/windows-cluster-interview-questions-and-answers/

If the configuration of the cluster changes, that change is replicated across the different disks