Answer / sreedhar

marker interface is there no content of that,Marker
interfaces are Serializable, Clonable, SingleThreadModel,
Event listener. Marker Interfaces are implemented by the
classes or their super classes in order to add some
functionality.

Answer / ranjan

A Interface that have no member is known as marker or Tagged
interface.They are used to providde some essential
information to JVM sothat jvm may perform some useful operation.

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