The way central and state governments influence each other:
Federalism is the arrangement of government wherein sway is intrinsically isolated between a focal overseeing authority and constituent political units. It depends on vote based guidelines and organizations in which the ability to oversee is shared among national and state governments, making an alliance.
Double federalism is a political course of action where power is separated among national and state governments in plainly characterized terms, with state governments practicing those forces concurred to them without obstruction from the national government.
Double federalism is characterized rather than helpful federalism, in which national and state governments team up on strategy. Double and helpful federalism are otherwise called 'layer-cake' and 'marble cake federalism, separately, because of the unmistakable layers of layer cake and the more jumbled appearance of marble cake.