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Trắc nghiệm Ngôn Ngữ Lập Trình C++ - Bài 54

1-	Which of the following statement is correct about the program given below? #include<iostream.h> int i, j; class IndiaBix { public: IndiaBix(int x = 0, int y = 0) { i = x; j = x; Display(); } void Display() { cout<< j <<" "; } }; int main() { IndiaBix objBix(10, 20); int &s = i; int &z = j; i++; cout<< s-- << " " << ++z; return 0; }
	A -	The program will print the output 0 11 21.
	B -	The program will print the output 10 11 11.
	C -	The program will print the output 10 11 21.
	D -	The program will print the output 10 11 12.
2-	Which of the following statement is correct about the program given below? #include<iostream.h> int x, y; class BixTest { public: BixTest(int xx = 0, int yy = 0) { x = xx; y = yy; Display(); } void Display() { cout<< x << " " << y << " "; } }; int main() { BixTest objBT(10, 20); int &rx = x; int &ry = y; ry = x; rx = y; cout<< rx--; return 0; }
	A -	The program will print the output 0 0 10.
	B -	The program will print the output 10 20 10.
	C -	The program will print the output 10 20 9.
	D -	It will result in a compile time error.
3-	Which of the following statement is correct about the program given below? #include<iostream.h> class IndiaBix { int a, b, c; public: void SetValue(int x, int y ,int z) { a = x; b = y; c = z; } void Display() { cout<< a << " " << b << " " << c; } }; int main() { IndiaBix objBix; int x = 2; int &y = x; y = 5; objBix.SetValue(x, ++y, x + y); objBix.Display(); return 0; }
	A -	The program will print the output 5 6 10.
	B -	The program will print the output 6 6 12.
	C -	The program will print the output 6 6 10.
	D -	It will result in a compile time error.
4-	What will be the output of the program given below? #include<iostream.h> class BixBase { int x; public: BixBase(int xx = 0) { x = xx; } void Display() { cout<< x ; } }; class BixDerived : public BixBase { int y; public: BixDerived(int yy = 0) { y = yy; } void Display() { cout<< y ; } }; int main() { BixBase objBase(10); BixBase &objRef = objBase; BixDerived objDev(20); objRef = objDev; objDev.Display(); return 0; }
	A -	10
	B -	20
	C -	Garbage-value
	D -	It will result in a compile-time/run-time error.
5-	What will be the output of the following program? #include<iostream.h> long BixFunction(int x, int y = 5, float z = 5) { return(++x * ++y + (int)++z); } int main() { cout<< BixFunction(20, 10); return 0; }
	A -	237
	B -	240
	C -	35
	D -	The program will report error on compilation.
6-	What will be the output of the following program? #include<iostream.h> int BixFunction(int a, int b = 3, int c = 3) { cout<< ++a * ++b * --c ; return 0; } int main() { BixFunction(5, 0, 0); return 0; }
	A -	8
	B -	6
	C -	-6
	D -	-8
7-	What will be the output of the following program? #include<iostream.h> void MyFunction(int a, int b = 40) { cout<< " a = "<< a << " b = " << b << endl; } int main() { MyFunction(20, 30); return 0; }
	A -	a = 20 b = 40
	B -	a = 20 b = 30
	C -	a = 20 b = Garbage
	D -	a = Garbage b = 40
8-	Which of the following statement is correct about the program given below? #include<iostream.h> static int b = 0; void DisplayData(int x, int y = &b) { cout<< x << " " << y; } int main() { int a = 10, b = 20 ; DisplayData(&a, &b); return 0; }
	A -	The program will print the output 10 20.
	B -	The program will print the output 10 0.
	C -	The program will print the output 10 garbage.
	D -	The program will report compile time error.
9-	What will be the output of the following program? #include<iostream.h> typedef void(FunPtr)(int); int Look(int = 10, int = 20); void Note(int); int main() { FunPtr ptr = Note; (ptr)(30); return 0; } int Look(int x, int y) { return(x + y % 20); } void Note(int x) { cout<< Look(x) << endl; }
	A -	20
	B -	30
	C -	40
	D -	Compilation fails.
10-	Which of the following statement is correct about the program given below? #include<iostream.h> class IndiaBix { int x, y; public: IndiaBix(int xx = 0, int yy = 0) { x = xx; y = yy; } void Display() { cout<< x << " " << y; } IndiaBix operator +(IndiaBix z) { IndiaBix objTemp; objTemp.x = x / z.x; objTemp.y = y / z.y; return objTemp; } }; int main() { IndiaBix objBix1(90, 80); IndiaBix objBix2(10, 20); IndiaBix objSum; IndiaBix &objRef = objSum; objRef = objBix1 + objBix2; objRef.Display(); return 0; }
	A -	It will result in a runtime error.
	B -	It will result in a compile time error.
	C -	The program will print the output 9 4.
	D -	The program will print the output 100 100.

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