Answer Posted / shiv chidambar

size of empty class is 1 byte.
because to indicate class existance in memory 1 byte is
allocated to indicate that class is present.

if the class is empty then there should some kind of
mechanism to indicate or to show this class is present.
if memory (1 byte) not alloacted such a empty class then how
we know that class is present but in programme that class is
written? so for that 1 byte allocated to indicate class
existance.
this happens only for emty classes(Consider example of
tagging interface in java which is empty class).

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