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(a)(i)Briefly explain how multiple inheritance is accomplished in
Java.[1 mark ]
(ii)State what definitions are implicit about variables in an interface.[1
mark ]
(iii)State what definitions are implicit about methods in a interface.[1
mark ]
(b)(i)The generic type Drink has some specific properties associated
with it.In
particular,a Drink has a volume anda QuantityOfFlavouring The
QuantityOfFlavouring is dependent upon which type of drink is under
consideration.Define a class Drink which contains the integer returning
method QuantityOfFlavouring which is to be implemented in all derived
classes,and the integer member volume which is not to be overridden
by any
derived classes.[3 marks ]
(ii)A Tea is a particular type ofdrink.To make a perfect cup of tea,1
gramme of
tea is needed per 100 milliliters of water.Using the base class Drink
derive a
class Tea which contains an implementation of the derived method
QuantityOfFlavouring such that it will divide the volume by 100,to
give the
precise quantity of tea needed for a perfect cup.As this property
is consistent
for all teas,this method should not be modifiable for any subsequent
derived
classes.[3 marks ]
(iii)Define an interface class,called Medicine which contains a method
called
ActiveIngredient which returns a String which will contain the name
ofthe
active ingredient in any derived classes.[2 marks ]
(iv)A Herbal Tea is a particular type of tea which also has some medicinal
properties,and therefore is a derivation of both a Tea and a Medicine
Implement a class,called HerbalTea which is a derivation ofthe base
class Tea
and the interface Medicine Your class should provide an implementation
of
the abstract function ActiveIngredients such that it sets the value
of the
private String member MyActiveIngredient to herb [4marks ]
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