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Trắc nghiệm Ngôn Ngữ Lập Trình C++ - Bài 51

1-	What will be the output of the following program? #include<iostream.h> class IndiaBix { static int count; public: static void First(void) { count = 10; } static void Second(int x) { count = count + x; } static void Display(void) { cout<< count << endl; } }; int IndiaBix::count = 0; int main() { IndiaBix :: First(); IndiaBix :: Second(5); IndiaBix :: Display(); return 0; }
	A -	5 C
	B -	10
	C -	15
	D -	The program will report compile time error.
2-	What will be the output of the following program? #include<iostream.h> class BixBase { public: float x; }; class BixDerived : public BixBase { public: char ch; void Process() { ch = (int)((x=12.0)/3.0); } void Display() { cout<< (int)ch; } }; int main() { class BixDerived *objDev = new BixDerived; objDev->Process(); objDev->Display(); return 0; }
	A -	The program will print the output 4.
	B -	The program will print the ASCII value of 4.
	C -	The program will print the output 0.
	D -	The program will print the output garbage.
3-	Which of the following statement is correct about the program given below? #include<iostream.h> #include<process.h> class IndiaBix { static int x; public: IndiaBix() { if(x == 1) exit(0); else x++; } void Display() { cout<< x << " "; } }; int IndiaBix::x = 0; int main() { IndiaBix objBix1; objBix1.Display(); IndiaBix objBix2; objBix2.Display(); return 0; }
	A -	The program will print the output 1 2.
	B -	The program will print the output 0 1.
	C -	The program will print the output 1 1.
	D -	The program will print the output 1.
4-	Which of the following statement is correct about the program given below? #include<iostream.h> class BixBase { int x, y; public: BixBase(int xx = 10, int yy = 10) { x = xx; y = yy; } void Show() { cout<< x * y << endl; } }; class BixDerived { private: BixBase objBase; public: BixDerived(int xx, int yy) : objBase(xx, yy) { objBase.Show(); } }; int main() { BixDerived objDev(10, 20); return 0; }
	A -	The program will print the output 100.
	B -	The program will print the output 200.
	C -	The program will print the output Garbage-value.
	D -	The program will report compile time error.
5-	Which of the following statement is correct about the program given below? #include<iostream.h> class BixBase { int x, y; public: BixBase(int xx = 10, int yy = 10) { x = xx; y = yy; } void Show() { cout<< x * y << endl; } }; class BixDerived : public BixBase { private: BixBase objBase; public: BixDerived(int xx, int yy) : BixBase(xx, yy) { objBase.Show(); } }; int main() { BixDerived objDev(10, 20); return 0; }
	A -	The program will print the output 100.
	B -	The program will print the output 200.
	C -	The program will print the output Garbage-value.
	D -	The program will report compile time error.
6-	What will be the output of the following program? #include<iostream.h> class A { public: void BixFunction(void) { cout<< "Class A" << endl; } }; class B: public A { public: void BixFunction(void) { cout<< "Class B" << endl; } }; class C : public B { public: void BixFunction(void) { cout<< "Class C" << endl; } }; int main() { A *ptr; B objB; ptr = &objB; ptr = new C(); ptr->BixFunction(); return 0; }
	A -	Class A.
	B -	Class B.
	C -	Class C.
	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 BixBase { int x, y; public: BixBase(int xx = 10, int yy = 10) { x = xx; y = yy; } void Show() { cout<< x * y << endl; } }; class BixDerived : public BixBase { private: BixBase objBase; public: BixDerived(int xx, int yy) : BixBase(xx, yy), objBase(yy, yy) { objBase.Show(); } }; int main() { BixDerived objDev(10, 20); return 0; }
	A -	The program will print the output 100.
	B -	The program will print the output 200.
	C -	The program will print the output 400.
	D -	The program will print the output Garbage-value.
8-	What will be the output of the following program? #include<iostream.h> class Point { int x, y; public: Point(int xx = 10, int yy = 20) { x = xx; y = yy; } Point operator + (Point objPoint) { Point objTmp; objTmp.x = objPoint.x + this->x; objTmp.y = objPoint.y + this->y; return objTmp; } void Display(void) { cout<< x << " " << y; } }; int main() { Point objP1; Point objP2(1, 2); Point objP3 = objP1 + objP2; objP3.Display(); return 0; }
	A -	1 2
	B -	10 20
	C -	11 22
	D -	Garbage Garbage
9-	What will be the output of the following program? #include<iostream.h> #include<string.h> class IndiaBix { char str[50]; char tmp[50]; public: IndiaBix(char s) { strcpy(str, s); } int BixFunction() { int i = 0, j = 0; while((str + i)) { if((str + i++) == ' ') (tmp + j++) = (str + i); } (tmp + j) = 0; return strlen(tmp); } }; int main() { char txt[] = "Welcome to IndiaBix.com!"; IndiaBix objBix(txt); cout<< objBix.BixFunction(); return 0; }
	A -	1
	B -	3
	C -	24
	D -	25
10-	Which of the following statement is correct about the program given below? #include<iostream.h> class Bix { int x; public: Bix(); ~Bix(); void Show() const; }; Bix::Bix() { x = 25; } void Bix::Show() const { cout<< x; } int main() { Bix objB; objB.Show(); return 0; }
	A -	The program will print the output 5.
	B -	The program will report compile time error.
	C -	The program will print the output 25.
	D -	The program will print the output Garbage-value.

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