Topic :: Destructor





Destructor Interview Questions
Questions Answers Views Company eMail

Can destructors have access modifiers?

618

Can I call a virtual method from a constructor/destructor?

538

Can you pass parameters to destructors?

598

Can a class have more than 1 destructor?

580

Can you explicitly call a destructor on a local variable?

646

Describe the process of creation and destruction of a derived class object?

716

Explain how would you handle a situation where you cannot call the destructor of a local explicitly?

600

Can we declare a base-class destructor as virtual?

637

Define the process of handling in case of destructor failure?

641

Write about the use of the virtual destructor?

670

What is the sequence of destruction of local objects?

608

How to revert the most recent ‘destructive’ operation, changing the set of matched elements to its previous state using ?

519

Define how destructors are defined in java?

652

How destructors are defined in java?

709

When is the destructor called?

665




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Un-Answered Questions { Destructor }

Does .net supports destructors concept?

1694


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

1719


what are constructors and destructors?

1785


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; }

2131


Always declare destructors to be virtual"?????? why this is so needed?????

1566






Why is it so that we can have virtual constructors but we cannot have virtual destructors?

3989


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?

1771


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.

1533


Why are the destructors for base class and derived class called in reverse order when the program exits

1793


Destructors CANNOT be implemented in which one of the following?

5532


write a C++ program for booking using constructor and destructor.

2106


What happens if an exception is throws from an object's destructor?

650


what is a destructor?

666


What are virtual destructors?

579


What is the purpose of a constructor? Destructor?

768