What is virtual destructors? Why they are used? - Virtual destructors are used for the same purpose as virtual functions. When you remove an object of subclass, which is referenced by a parent class pointer, only destructor of base class will get executed. But if the destructor is defined using virtual keyword, both the destructors [ of parent and sub class ] will get invoked.

CoolInterview.com - World's Largest Collection of Interview Questions & Answers, FAQs, queries, sample papers, exam papers, dumps, what, why, how, where, when questions

OneStopTesting.com - Testing EBooks, Tutorials, Articles, Jobs, Training Institutes etc.
OneStopGate.com - Gate EBooks, Tutorials, Articles, FAQs, Jobs, Training Institutes etc.
OneStopMBA.com - MBA EBooks, Tutorials, Articles, FAQs, Jobs, Training Institutes etc.
OneStopIAS.com - IAS EBooks, Tutorials, Articles, FAQs, Jobs, Training Institutes etc.
OneStopSAP.com - SAP EBooks, Tutorials, Articles, FAQs, Jobs, Training Institutes etc.
OneStopGRE.com - of GRE EBooks, Tutorials, Articles, FAQs, Jobs, Training Institutes etc.

Sponsored Links

Interview Questions

INTERVIEW QUESTIONS

PROGRAMMING LANGUAGES

C++

DETAILS

Question: What is virtual destructors? Why they are used?

Answer: Virtual destructors are used for the same purpose as virtual functions. When you remove an object of subclass, which is referenced by a parent class pointer, only destructor of base class will get executed. But if the destructor is defined using virtual keyword, both the destructors [ of parent and sub class ] will get invoked.

Category	C++ Interview Questions & Answers - Exam Mode / Learning Mode
Rating	(0.2) By 9180 users
Added on	5/3/2016
Views	70374
Rate it!

Question: What is virtual destructors? Why they are used?

Answer:

Virtual destructors are used for the same purpose as virtual functions. When you remove an object of subclass, which is referenced by a parent class pointer, only destructor of base class will get executed. But if the destructor is defined using virtual keyword, both the destructors [ of parent and sub class ] will get invoked. Source: CoolInterview.com

If you have the better answer, then send it to us. We will display your answer after the approval.

Rules to Post Answers in CoolInterview.com:-

There should not be any Spelling Mistakes.

There should not be any Gramatical Errors.

Answers must not contain any bad words.

Answers should not be the repeat of same answer, already approved.

Answer should be complete in itself.

	Related Questions	View Answer
	What do you mean by C++ access specifiers ?	View Answer
	What are the advantages of operator overloading?	View Answer
	What are the advantages of using cin and cout compared to scanf(...) and printf(...), respectively?	View Answer
	What are static members and static functions?	View Answer
	What are storage qualifiers in C++ ?	View Answer
	What is the use of default constructor?	View Answer
	What are tokens in C++?	View Answer
	Define destuctors ?	View Answer
	What is the difference between a template class and class template?	View Answer
	What are the differences between new and malloc ?	View Answer
	What is difference between template and macro ?	View Answer
	What do you mean by early binding?	View Answer
	How can we access protected and private members of a class?	View Answer
	what should the 64-bit integer type on new,64-bit machines be?	View Answer
	Applications of c++ object oriented programs?	View Answer
	What is a mutable member?	View Answer
	Define a constructor - What it is and how it might be called (2 methods).	View Answer
	Anything wrong with this code? T *p = 0; delete p;	View Answer
	Anything wrong with this code? T *p = new T[10]; delete p;	View Answer
	What is an orthogonal base class?	View Answer

Please Note: We keep on updating better answers to this site. In case you are looking for Jobs, Pls Click Here Vyoms.com - Best Freshers & Experienced Jobs Website.

View All C++ Interview Questions & Answers - Exam Mode / Learning Mode