use of marker interface

[venkatallu]

what is the use of marker interface?
why serializable interface is marker interface?

[Nicholas Jordan]

A marker interface is a do-nothing, but allows strong typing so that code groups can match and mix with greater precision.

Example, you would not want jelly rolls and coffee methods when trying to do quantum chromodynamics.

Proabably not, some people would. We read about those people in the newspapers.