what is a virtual class?
Answer Posted / raj
In multiple inheritance when a class D is derived by two
base classes B and C and both base class is also inherite
by same class A then then class D will get duplicate copy
of uppper most base class A.In this case class A will
declare as virtual class
Is This Answer Correct ? | 41 Yes | 5 No |
Post New Answer View All Answers
What is encapsulation in oop?
Why is destructor used?
What do you mean by variable?
What is abstraction with example?
Can we create object of interface?
What is the difference between abstraction and polymorphism?
How Do you Code Composition and Aggregation in C++ ?
Can an interface inherit a class?
What is difference between multiple inheritance and multilevel inheritance?
What is property in oops?
How oops is better than procedural?
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 is the 3 types of system development life cycle
What is polymorphism and why is it important?
Is enum a class?