7. Oop-Diff B/w Interfacse and abstract class.
- 3 Answers
- 3704 Views
- PCS, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / preetham
Abstract Class:
* It contains both abstract methods and normal methods
* We can not create an instance of abstract class
* we can inherit only one abstract class
Interface :
* It contains only abstract methods which has only signature does't have body
* We can not create an instance of interface.
* We can inherit multiple interfaces
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / swati
Abstract Class:-
In abstract class atleast one method is abstract compulsary.
You can define the method body for normal methods in
abstract class.
Interfaces:-
All methods are static abstract ,does't have body.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / pinki
Main difference is methods of a Java interface are
implicitly abstract and cannot have implementations. A Java
abstract class can have instance methods that implements a
default behavior.
Variables declared in a Java interface is by default
final. An abstract class may contain non-final variables.
Members of a Java interface are public by default. A
Java abstract class can have the usual flavors of class
members like private, protected, etc..
Java interface should be implemented using keyword
“implements”; A Java abstract class should be extended using
keyword “extends”.
An interface can extend another Java interface only, an
abstract class can extend another Java class and implement
multiple Java interfaces.
A Java class can implement multiple interfaces but it
can extend only one abstract class.
Interface is absolutely abstract and cannot be
instantiated; A Java abstract class also cannot be
instantiated, but can be invoked if a main() exists.
In comparison with java abstract classes, java
interfaces are slow as it requires extra indirection.
| Is This Answer Correct ? | 0 Yes | 0 No |
What is Com Callable wrapper?when it will created?
Explain the race around condition? : Dot net architecture
Define pipelining? : Dot net architecture
how to find the 2nd higgest salary in the column for example take table name is employee? And also find bottom 2nd lowest salary ?
11 Answers GeoTechnology, Wipro,
What's new in the .net 2.0 class library?
difference between page init an page load
If I'm developing an application that must accomodate multiple security levels though secure login and my ASP.NET web appplication is spanned across three web-servers (using round-robbin load balancing) what would be the best approach to maintain login-in state for the users?
what is the difference between value types and reference types?
Can you give an example of when it would be appropriate to use a web service as opposed to a non-serviced .NET component
How do I know when my thread pool work item has completed?
What is the purpose of Accordian in jquery? Where it can be used?
which class library is used to find unique key?
Dot Net Framework 
