Trung tâm khảo thí trực tuyến-Online Test Center-

Tin Học || Căn Bản Văn Phòng Hệ Thống - Mạng Phần Mềm Ứng Dụng Kỹ thuật số Lập trình SQL

Trắc nghiệm Ngôn Ngữ Lập Trình C++ - Bài 58

1-	What will be the output of the following program? #include<iostream.h> #include<string.h> class BixString { char x[50]; char y[50]; char z[50]; public: BixString() { } BixString(char* xx) { strcpy(x, xx); strcpy(y, xx); } BixString(char xx, char yy = " C++", char *zz = " Programming!") { strcpy(z, xx); strcat(z, yy); strcat(z, zz); } void Display(void) { cout<< z << endl; } }; int main() { BixString objStr("Learn", " Java"); objStr.Display(); return 0; }
	A -	Java Programming!
	B -	C++ Programming!
	C -	Learn C++ Programming!
	D -	Learn Java Programming!
2-	What will be the output of the following program? #include<iostream.h> class BaseCounter { protected: long int count; public: void CountIt(int x, int y = 10, int z = 20) { count = 0; cout<< x << " " << y << " " << z << endl; } BaseCounter() { count = 0; } BaseCounter(int x) { count = x ; } }; class DerivedCounter: public BaseCounter { public: DerivedCounter() { } DerivedCounter(int x): BaseCounter(x) { } }; int main() { DerivedCounter objDC(30); objDC.CountIt(40, 50); return 0; }
	A -	30 10 20
	B -	Garbage 10 20
	C -	40 50 20
	D -	20 40 50
3-	What will be the output of the following program? #include<iostream.h> class Number { int Num; public: Number(int x = 0) { Num = x; } void Display(void) { cout<< Num; } void Modify(); }; void Number::Modify() { int Dec; Dec = Num % 13; Num = Num / 13; if(Num > 0 ) Modify() ; if(Dec == 10) cout<< "A" ; else if(Dec == 11) cout<< "B" ; else if(Dec == 12) cout<< "C" ; else if(Dec == 13) cout<< "D" ; else cout<< Dec ; } int main() { Number objNum(130); objNum.Modify(); return 0; }
	A -	130
	B -	A0
	C -	B0
	D -	90
4-	What will be the output of the following program? #include<iostream.h> class Base { int x, y; public: Base() { x = y = 0; } Base(int xx) { x = xx; } Base(int p, int q = 10) { x = p + q; y = q; } void Display(void) { cout<< x << " " << y << endl; } }objDefault(1, 1); class Derived: public Base { Base obj; public: Derived(int xx, int yy): Base(xx, xx + 1) { } Derived(Base objB = objDefault) { } }; int main() { Derived objD(5, 3); Derived *ptrD = new Derived(objD); ptrD->Display(); delete ptrD; return 0; }
	A -	8 3
	B -	11 6
	C -	11 10
	D -	The program will not compile successfully.
5-	What is correct about the following program? #include<iostream.h> class Base { int x, y, z; public: Base() { x = y = z = 0; } Base(int xx, int yy = 'A', int zz = 'B') { x = xx; y = x + yy; z = x + y; } void Display(void) { cout<< x << " " << y << " " << z << endl; } }; class Derived : public Base { int x, y; public: Derived(int xx = 65, int yy = 66) : Base(xx, yy) { y = xx; x = yy; } void Display(void) { cout<< x << " " << y << " "; Display(); } }; int main() { Derived objD; objD.Display(); return 0; }
	A -	The program will run successfully giving the output 66 65.
	B -	The program will run successfully giving the output 66 65 65 131 196.
	C -	The program will run successfully giving the output 65 66.
	D -	The program will produce the output 66 65 infinite numb
6-	Which of the following statement is correct about the program given below? #include<iostream.h> static int Result; class India { public: void Change(int x = 10, int y = 20, int z = 30) { cout<< x + y + z; } void Display(int x = 40, float y = 50.00) { Result = x % x; cout<< Result; } }; class Bix { int x, y; public: void Change(int x, int y = 50) { cout<< x + y; } }; class IndiaBix: public India, public Bix { public: void Display(int x = 10, int xx = 100, int xxx = 1000) { Result = x + xx % x * x; cout<< Result ; } }; int main() { IndiaBix objBix; objBix.India::Display(10, 20.00); return 0; }
	A -	The program will print the output 0.
	B -	The program will print the output 10.
	C -	The program will print the output 30.
	D -	The program will print the output 40.
7-	Which of the following statement is correct about the program given below? #include<iostream.h> class IndiaBix { int x; float y; public: void BixFunction(int = 0, float = 0.00f, char = 'A'); void BixFunction(float, int = 10.00, char = 'Z'); void BixFunction(char, char, char); }; int main() { IndiaBix objBix; objBix.BixFunction(10 * 1.0, int(56.0)); return 0; } void IndiaBix::BixFunction(int xx, float yy, char zz) { x = xx + int(yy); cout<< "x = " << x << endl; } void IndiaBix::BixFunction(float xx, int yy, char zz) { x = zz + zz; y = xx + yy; cout<< " x = " << x << endl; } void IndiaBix::BixFunction(char xx, char yy, char zz) { x = xx + yy + zz; y = float(xx * 2); cout<< " x = " << x << endl; }
	A -	The program will print the output x = 65.
	B -	The program will print the output x = 66.
	C -	The program will print the output x = 130.
	D -	The program will print the output x = 180.
8-	Which of the following statement is correct about the program given below? #include<iostream.h> static double gDouble; static float gFloat; static double gChar; static double gSum = 0; class BaseOne { public: void Display(double x = 0.0, float y = 0.0, char z = 'A') { gDouble = x; gFloat = y; gChar = int(z); gSum = gDouble + gFloat + gChar; cout << gSum; } }; class BaseTwo { public: void Display(int x = 1, float y = 0.0, char z = 'A') { gDouble = x; gFloat = y; gChar = int(z); gSum = gDouble + gFloat + gChar; cout << gSum; } }; class Derived : public BaseOne, BaseTwo { void Show() { cout << gSum; } }; int main() { Derived objDev; objDev.BaseTwo::Display(10, 20, 'Z'); return 0; }
	A -	The program will print the output 0.
	B -	The program will print the output 120.
	C -	The program will report run-time error.
	D -	The program will report compile-time error.
9-	What will be the output of the following program? #include<iostream.h> class Base { public: int S, A, M; Base(int x, int y) { S = y - y; A = x + x; M = x * x; } Base(int, int y = 'A', int z = 'B') { S = y; A = y + 1 - 1; M = z - 1; } void Display(void) { cout<< S << " " << A << " " << M << endl; } }; class Derived : public Base { int x, y, z; public: Derived(int xx = 65, int yy = 66, int zz = 67): Base(x) { x = xx; y = yy; z = zz; } void Display(int n) { if(n) Base::Display(); else cout<< x << " " << y << " " << z << endl; } }; int main() { Derived objDev; objDev.Display(-1); return 0; }
	A -	65 65 65
	B -	65 66 67
	C -	A A A
	D -	A B C
10-	What will be the output of the following program? #include<iostream.h> class Base { public: char S, A, M; Base(char x, char y) { S = y - y; A = x + x; M = x * x; } Base(char, char y = 'A', char z = 'B') { S = y; A = y + 1 - 1; M = z - 1; } void Display(void) { cout<< S << " " << A << " " << M << endl; } }; class Derived : public Base { char x, y, z; public: Derived(char xx = 65, char yy = 66, char zz = 65): Base(x) { x = xx; y = yy; z = zz; } void Display(int n) { if(n) Base::Display(); else cout<< x << " " << y << " " << z << endl; } }; int main() { Derived objDev; objDev.Display(0-1); return 0; }
	A -	A A A
	B -	A B A
	C -	A B C
	D -	Garbage Garbage Garbage

[Người đăng: Thành Lãm - ST]