To invoke the virtual toString() function defined in GeometricObject from a Circle object c, use :A. ((GeometricObject*)c)->toString();B. c.super.toString()C. (GeometricObject*)c->toString();D. c->GeometricObject::toString()

vijay.badola

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• Dec 31st, 2009

If we take the following class definitions:class CGeometricObject{public:virtual void toString(){ printf("I am in base");}};class Circle : public GeometricObject{public:void toString(){...

sachin_mundhra

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• Dec 18th, 2009

C) (GeometricObject*)c->toString();

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How can a C++ developer use the placement new syntax to make new allocate an object of class SomeClass at a particular memory address stored in a pointer type variable named pmem?A. new SomeClass(pmem);B. new(pmem) SomeClass;C. new SomeClass pmem;D. new pmem SomeClass;E. new (pmem, SomeClass);

ajrobb

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• Sep 22nd, 2010

BWhere you use placement new, it is important to explicitly call the destructor for the object before re-using the memory.Fred * fred = new(pmem) Fred();...fred->~Fred();fred = 0;George * george(pmem) George();

akash_saxena

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• Dec 22nd, 2009

It is B. new(pmem) SomeClass;pmem points to the memory which shall be used.

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