Interested to Buy Any Domain ? << Click Here >> for more details...
Difference between abstract class and interface
- 100 Answers
- 298101 Views
- Accenture, Altruist, Baba Group, CitiGroup, Fiserv, HCL, IBM, iGate, Infosys, Jean Martin, Karthik Industries, Microsoft, OnDLine, TCS, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / sumit gupta
the basic logical difference is you create abstract class when there is a relation between two classes that will inherit the abstract class and you create interface for the classes which are not related to each other but do have some common functionality.
below link describes it quite nicely.
http://devworkexperience.com/2011/09/interfaces-vs-abstract-classes/
| Is This Answer Correct ? | 1 Yes | 1 No |
Answer / killer
An abstract class is a special kind of class It allow other
classes to inherit but cannot be instantiated. It Inherit
only one abstract class.
An interface is similar to Abstract class, it cannot use
override keyword in inheritance class. It inherits several
interfaces.
| Is This Answer Correct ? | 1 Yes | 1 No |
Answer / arunachalam.m
To inherit the more than one interface class.... But in
abstract onle one abstract class can be inherit them....
| Is This Answer Correct ? | 1 Yes | 1 No |
Answer / ravi anand pathak
1)-Abstract class required two key word for declaring
abstract class.
Interface required interface keyword for declaring the
interface.
2)-Within abstract class we can declare concrite and
abstract both type of method.
Interface support only abstract method.
3)-Variable declared within abstract class are normal.
All variables are emplicitly final,public static within
interface.
4)-We required abstract keyword to declared abstract
keyword.
All methods areemplicitlypublic and abstract.
5)-We use extends kyeword to inheriate any abstract class.
We use implements kyeword to use interfaces.
6)-Only one abstract class can extends at a time(single
inheritence).
We can use multipleinterface in a class at asame time(just
like multiple overriding).
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / penchalaramaiah
An Abstract class have an implementation but an interface should not any implementation and it contains only definition
and interface contains by default abstract methods but an abstract class contains subclassess
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / braham dutt
Abstract classes can have implementations for some of its
members (Methods), but the inteface class can't have
implementation for any of its members.
Abstract classes are faster than interfaces.
Interface comes in Inheritance chain while Abstract not.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / ramana
abstract class is about to have defined and undefined methods.but in case of interfaces ,only method declarations are avaliable.abstract class can't support multiple inheritance but interfaces can support.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / abi
In Abstract class we can do implementation for its methods
but in interface we can not do implemantations for any of
ti's methods
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / malar
In Abstract class:We cant create the instance for abstract
class..
In Interface:It allow to create the instance through
implementing classes...
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / ramani krunal
1. interface contains methods that must be abstract;
abstract class may contain concrete methods.
2. interface contains variables that must be static and
final; abstract class may contain non-final and final variables.
3. members in an interface are public by default,
abstract class may contain non-public members.
4. interface is used to "implements"; whereas abstract
class is used to "extends".
5. interface can be used to achieve multiple inheritance;
abstract class can be used as a single inheritance.
6. interface can "extends" another interface, abstract
class can "extends" another class and "implements" multiple
interfaces.
7. interface is absolutely abstract; abstract class can
be invoked if a main() exists.
8. interface is more flexible than abstract class because
one class can only "extends" one super class, but
"implements" multiple interfaces.
9. If given a choice, use interface instead of abstract
class.
| Is This Answer Correct ? | 0 Yes | 1 No |
It was told that .Net 2.0 Framework has got it's in built webserver. Does it mean that it doesn't need IIS? What is the significance of Front Page Server Extensions in creating or hosting a Web Application in .net?
1 Answers 247Customer, Concentrix, Wipro,
What i sthe meaning of .(dot) in .Net?
Let's say I have an existing application written using Visual Studio 6 (VB 6, InterDev 6) and this application utilizes Windows 2000 COM+ transaction services. How would you approach migrating this application to .NET ?
.net platform independent or dependent?
how to make and display a form without title bar?
The maximum report processing jobs limit configured by your system administrator has been reached.How I can Solve this problem when i using crystal report to load from my application.
What are the types of application software?
what are constructors and destructors?
Explain Intermediate Language?
How to call the dll at runtime in .Net?
Explain about .net garbage collector?
What is the use of web.config?
Dot Net Framework 
