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Trắc nghiệm Ngôn Ngữ Lập Trình C++ - Bài 49

1-	Which of the following statement is correct about the program given below? #include<iostream.h> class IndiaBix { int x; public: IndiaBix(short ss) { cout<< "Short" << endl; } IndiaBix(int xx) { cout<< "Int" << endl; } IndiaBix(char ch) { cout<< "Char" << endl; } ~IndiaBix() { cout<< "Final"; } }; int main() { IndiaBix *ptr = new IndiaBix('B'); return 0; }
	A -	The program will print the output Short .
	B -	The program will print the output Int .
	C -	The program will print the output Char .
	D -	The program will print the output Final .
2-	Which of the following statement is correct about the program given below? #include<iostream.h> class IndiaBix { int x; public: IndiaBix(short ss) { cout<< "Short" << endl; } IndiaBix(int xx) { cout<< "Int" << endl; } IndiaBix(float ff) { cout<< "Float" << endl; } ~IndiaBix() { cout<< "Final"; } }; int main() { IndiaBix *ptr = new IndiaBix('B'); return 0; }
	A -	The program will print the output Short .
	B -	The program will print the output Int .
	C -	The program will print the output Float .
	D -	The program will print the output Final .
3-	What will be the output of the following program? #include<iostream.h> class BixBase { public: BixBase() { cout<< "Base OK. "; } ~BixBase() { cout<< "Base DEL. "; } }; class BixDerived: public BixBase { public: BixDerived() { cout<< "Derived OK. "; } ~BixDerived() { cout<< "Derived DEL. "; } }; int main() { BixBase *basePtr = new BixDerived(); delete basePtr; return 0; }
	A -	Base OK. Derived OK.
	B -	Base OK. Derived OK. Base DEL.
	C -	Base OK. Derived OK. Derived DEL.
	D -	Base OK. Derived OK. Derived DEL. Base DEL.
4-	What will be the output of the following program? #include<iostream.h> class BixBase { public: BixBase() { cout<< "Base OK. "; } virtual ~BixBase() { cout<< "Base DEL. "; } }; class BixDerived: public BixBase { public: BixDerived() { cout<< "Derived OK. "; } ~BixDerived() { cout<< "Derived DEL. "; } }; int main() { BixBase *basePtr = new BixDerived(); delete basePtr; return 0; }
	A -	Base OK. Derived OK.
	B -	Base OK. Derived OK. Base DEL.
	C -	Base OK. Derived OK. Derived DEL.
	D -	Base OK. Derived OK. Derived DEL. Base DEL.
5-	What will be the output of the following program? #include<iostream.h> class BixBase { public: int x, y; BixBase(int xx = 0, int yy = 5) { x = ++xx; y = --yy; } void Display() { cout<< --y; } ~BixBase(){} }; class BixDerived : public BixBase { public: void Increment() { y++; } void Display() { cout<< --y; } }; int main() { BixDerived objBix; objBix.Increment(); objBix.Display(); return 0; }
	A -	3
	B -	4
	C -	5
	D -	Garbage-value
6-	What will be the out of the following program? #include<iostream.h> class BixBase { protected: int x, y; public: BixBase(int xx = 0, int yy = 0) { x = xx; y = yy; } void Show() { cout<< x * this->y << endl; } }; class BixDerived { private: BixBase objBase; public: BixDerived(int xx, int yy) : objBase(xx, yy) { objBase.Show(); } ~BixDerived() { } }; int main() { BixDerived objDev(10, 20); return 0; }
	A -	100
	B -	200
	C -	400
	D -	The program will report compile time error.
7-	Which of the following statement is correct about the program given below? #include<iostream.h> class IndiaBix { int x; public: IndiaBix() { x = 0; } IndiaBix(int xx) { x = xx; } IndiaBix(IndiaBix &objB) { x = objB.x; } void Display() { cout<< x << " "; } }; int main() { IndiaBix objA(25); IndiaBix objB(objA); IndiaBix objC = objA; objA.Display(); objB.Display(); objC.Display(); return 0; }
	A -	The program will print the output 25 25 25 .
	B -	The program will print the output 25 Garbage 25 .
	C -	The program will print the output Garbage 25 25 .
	D -	The program will report compile time error.
8-	Which of the following statement is correct about the program given below? #include<iostream.h> class IndiaBix { int x, y; public: IndiaBix() { x = 0; y = 0; } IndiaBix(int xx, int yy) { x = xx; y = yy; } IndiaBix(IndiaBix *objB) { x = objB->x; y = objB->y; } void Display() { cout<< x << " " << y; } }; int main() { IndiaBix objBix( new IndiaBix(20, 40) ); objBix.Display(); return 0; }
	A -	The program will print the output 0 0 .
	B -	The program will print the output 20 40 .
	C -	The program will print the output Garbage Garbage .
	D -	The program will report compile time error.
9-	What will be the out of the following program? #include<iostream.h> class BixBase { public: int x, y; public: BixBase(int xx = 0, int yy = 0) { x = xx; y = yy; } }; class BixDerived : public BixBase { private: BixBase objBase; public: BixDerived(int xx, int yy) : BixBase(xx), objBase(yy) { cout << this->x << " " << this->y << " " << objBase.x << " " << objBase.y << " "; } ~BixDerived() { } }; int main() { BixDerived objDev(11, 22); return 0; }
	A -	11 0 0 22
	B -	11 22 11 22
	C -	11 0 22 0
	D -	The program will report compile time error.
10-	What will be the out of the following program? #include<iostream.h> class BixBase { public: int x, y; public: BixBase(int xx = 0, int yy = 0) { x = xx; y = yy; } }; class BixDerived : public BixBase { private: BixBase objBase; public: BixDerived(int xx, int yy) : BixBase(xx), objBase(yy) { cout << x << " " << this->x << " " << BixBase::x << " " << this->objBase.x ; } ~BixDerived() { } }; int main() { BixDerived objDev(11, 22); return 0; }
	A -	11 11 0 22
	B -	11 11 11 0
	C -	11 11 11 22
	D -	The program will report compile time error.

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