what is abstract class ?
when is used in real time ?
give a exp
Answer Posted / ramakrishna yechuri
An Abstract class ia class which consists at least one
abstract method(in complete method).
Advantage is the user can implement the method body as per
his require ment.
ex: connect(){} ,I implement to conncect to oracle
database,u implement to conncet to sybase,my friend
implement this method to connect to oracle db. same connect
method acting in different forms (polymorphisim).
Note: Always Interfaces is better than Abstract class,becoz
Programming to Interface is better than programming to
classes.
To avoid dependency Injection problems.(spring).
Is This Answer Correct ? | 14 Yes | 4 No |
Post New Answer View All Answers
What is abstract class in oop?
Question In a class, there is a reference or pointer of an object of another class embedded, and the memory is either allocated or assigned to the new object created for this class. In the constructor, parameters are passed to initialize the data members and the embedded object reference to get inialized. What measures or design change should be advised for proper destruction and avioding memory leaks, getting pointers dangling for the embedded object memory allocation? Please suggest. Question Submitted By :: Sunil Kumar I also faced this Question!! Rank Answer Posted By Re: In a class, there is a reference or pointer of an object of another class embedded, and the memory is either allocated or assigned to the new object created for this class. In the constructor, parameters are passed to initialize the data members and the embedded object reference to get inialized. What measures or design change should be advised for proper destruction and avioding memory leaks, getting pointers dangling for the embedded object memory allocation? Please suggest. Answer # 1 use copy constructors 0 Shanthila There is something to be taken care in destructor, in copy constructor, suppose the memory is assigned to the embedded member object pointer with the parameter passed value, but if some other objects of different class also are pointing to this memory, then if some one deletes the object then this class member pointer object will become dangling, or if the object is not deleted properly then there will be memory leak. Please suggest the design change required to handle or avoid this situation
What does oop mean in snapchat?
What is cohesion in oop?
Is abstract thinking intelligence?
Templates mean
What are the features of oop?
write a code for this:trailer recordId contains a value other than 99, then the file must error with the reason ‘Invalid RECORD_ID’(User Defined Exception).
What is encapsulation process?
How do you explain polymorphism?
What is static modifier?
Write a program to implement OOPS concepts such as inheritance, polymorphism, friend function, operator overloading?
What is object in oop?
Why is abstraction needed?
Which language is not a true object oriented programming language?