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

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.

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.

What is the procedure on hardware that converts the ascii value to binary? : .NET Architecture

0 Answers  

---

What is .net mobile forms? : Microsoft dot net mobile

0 Answers  

---

Explain the purpose of cache? How is it used? : .NET Architecture

0 Answers  

---

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,

---

1. How to restrict a class from allowing to create only one object. I.e., one should be allowed to create only one object of the class type.

1 Answers   247Customer, FinEngine, TCS,

---

---

what is meant by language interoperability and language integration?

1 Answers   Six Sigma,

---

What is different about namespace declaration when comparing that to package declaration in java?

0 Answers  

---

what is the use of SQL command builder class in C#.net? Explain how can we execute a stored procedure using C#.Net? What is the difference between .DLL and .EXE?

2 Answers  

---

which would be the best to use inproc,outproc or sql server

2 Answers   Ness Technologies,

---

What is static Constructor?

4 Answers   iGate,

---

What is the use of web.config?

0 Answers  

---

hi, kindly send WWF(.net 3.5) pdf notes to my id. thanx in advance, chays

0 Answers  

---