Topic :: Destructor
1.explicit call for destructor 2.calling function inside a constructor. 3.base *b-new derived delete b; 4.delete p what it will delete. 5.size of base class and derived class int i,in base class and int j in derived. 6.int i-20 int main() { int i =5; printf("%d".::i); { int i =10; printf("%d".::i); } } 7.object slicing 8.new 9.function overloading(return type). 10.class base() { virtuval fun() { ----- } } class derivied:public base() { fun() { ----- } } int main() { derived d; } 11.how static function will call in C++? 12.default structures are in C++? 13.constructors should be in public . 14.virtuval constructor not exist. 15.multilevel inhritence. destructor order.
1 3813If TDQs are selfdestructive then why they are used? AND Why TSQs are preferred over TDQs?
IBM,
5 10562Why are the destructors for base class and derived class called in reverse order when the program exits
HCL,
1793
Does .net supports destructors concept?
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 are constructors and destructors?
what mean void creat_object?in public class in this code class A{ public: int x; A(){ cout << endl<< "Constructor A";} ~A(){ cout << endl<< "Destructor A, x is\t"<< x;} }; void create_object(); void main() { A a; a.x=10; { A c; c.x=20; } create_object(); } void create_object() { A b; b.x=30; }
Always declare destructors to be virtual"?????? why this is so needed?????
Why is it so that we can have virtual constructors but we cannot have virtual destructors?
what is the difference between C and C++? what is the difference between scanf and gets? what is mean by extern what is the use of it? what will happen if i say delete this> Difference between C structure and C++ structure? What is the difference between overloading and overridding? Explain the need for "virtual Destructor" Can we have "virtual Constructors"? What is the different types of polymorphism> What is virtual functions? How to implement virtual function in "C"? What are the different types of storage classes?
There are two base class B1,B2 and there is one class D which is derived from both classes, Explain the flow of calling constructors and destructors when an object of derived class is instantiated.
Why are the destructors for base class and derived class called in reverse order when the program exits
Destructors CANNOT be implemented in which one of the following?
write a C++ program for booking using constructor and destructor.
What happens if an exception is throws from an object's destructor?
what is a destructor?
What are virtual destructors?
What is the purpose of a constructor? Destructor?
