Answer / srihari

Interfaces are used to create prototype of classes. Interfaces would be using high-level access specifiers(public).

Abstraction is a mechanism in Java to expose the essential features of the class. Different levels of abstraction is achieved through Access specifiers.

Answer / nt.jayan

Interface contains final variable and method signatures
only. All of this method and variable are should be public.
In Technically interface like Pure Abstract class.

Abstract class contains both abstract method also may having
some method defination. When we want to use some of the
functionality in abstract we use Abstract class.

Also, By using Interface we achieve multiple inheritence
using Implements. When we use Abstract class we can extends
only.

Answer / manasa

Abstract means 4 which we cant give a concrete definition
for ex wtz d def for animal v cant give so v say animal as
abstract.
Interface came into existence to facilitate multiple
inheritance
Eg for abstract: animal is a abstract class and it contains
both abstract n non-abstract methods
But remember a non abstract class cannot contain abstract
methods
Suppose consider area as method and it is different for
diff shapes like circle,rectangle,square.... here area vil
b calculated for all d shapes bt their implementation is
diff n instead of callin dat area method again n again v
vil declare it once
Now lets move on to interface
for eg if we give a compliment to girl dat she sings like
lata mangeshkar n here both dat girl n lata are connected
together by a sing method n these both r two unrelated
things and in this case we use interface.....
thank u guys have a nice tym.....

Answer / ipdarsini

Interface is the 1st Level.here methods does not contain
any executable code.just it contains only declerations.here
in interface level we does not know anything.
Abstract class is a class which contains methods which may
contains exceutable code or not.this is the 2 nd level.here
in abstarct class level we know some thing.
for ex take a maruthi car.......
in interface level.
we doesn't know about egine company........some parts.....
we know .....but its not sure...
in abstract class level
for ex take a maruthi 800 car......
we knows the comapany of that car.
here we know about some thing bcz here they mentioned
maruthi 800....

thats the difference.....

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