Answer Posted / koti

Marker Interface:
Marker interface may be containing
methods,may not be containing methods.

Whenever any interface having a special behavior that type
of interfaces are called as marker interfaces (or) indicator
interface (or) tagged interface.

If interfaces not containing the methods, implementation
provided by the JVM.the given interfaces are not containing
the methods.
Ex: 1.java.lang.Serializable
2.java.lang.Cloneable
3.java.rmi.Remote
4.java.util.EventHandling
5.java.util.RandomAccess.

If interfaces containing methods then JVM not providing the
implementation ,expecting the implementation from the
programmer.

Ex: 1.java.lang.Runnable having the Run().
2.java.io.Externalizable having two methods those are
(a) writeExternal()
(b) readExternal()

In this Externalizable super class is Serializable.

Serializable not containing the methods but Externalizable
containing the methods.How can we say marker interface not
containing methods.

when super class serialized sub class also serialized.Where
as sub class is serialized super class members are serialized.

clone:
clone is duplicate collection of objects.

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