MCQ Exam Test

Q1

Which of the following operator can be overloaded?

Q2

What will be the output of the following C++ code? #include <iostream> using namespace std; int main () { int a, b; a = 10; b = 4; a = b; b = 7; cout << "a:"; cout << a; cout << " b:"; cout << b; return 0; }

Q3

Which operator a pointer object of a class uses to access its data members and member functions?

Q4

What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; int main () { std::string str ("Example."); str.back() = '!'; std::cout << str << endl; return 0; }

Q5

The data members and functions of a class in C++ are by default . . . . . . . .

Q6

What will be the output of the following C++ code? #include <iostream> using namespace std; class sample { private: int* i; int j; public: sample (int j); ~sample (); int& operator [] (int n); }; int& sample::operator [] (int n) { return i[n]; } sample::sample (int j) { i = new int [j]; j = j; } sample::~sample () { delete [] i; } int main () { sample m (5); m [0] = 25; m [1] = 20; m [2] = 15; m [3] = 10; m [4] = 5; for (int n = 0; n < 5; ++ n) cout << m [n]; return 0; }

Q7

What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; class A { static int a; public: A() { cout<<"Object of A is created\n"; } void show() { a++; cout<<"a: "<<a<<endl; } }; class B { public: }; int main(int argc, char const *argv[]) { A a1, a2; A a3 = a1 + a2; return 0; }

Q8

What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; int main () { string str = "HelloWorld!"; cout<<str.capacity(); cout<<str.size(); return 0; }

Q9

Which is the correct example of a binary operator?

Q10

How many arguments will the subscript operator will take for overloading?

Q11

#include <iostream> using namespace std; class three_d { int x, y, z; public: three_d() { x = y = z = 0; } three_d(int i, int j, int k) { x = i; y = j; z = k; } three_d operator()(three_d obj); three_d operator()(int a, int b, int c); friend ostream &operator<<(ostream &strm, three_d op); }; three_d three_d::operator()(three_d obj) { three_d temp; temp.x = (x + obj.x) / 2; temp.y = (y + obj.y) / 2; temp.z = (z + obj.z) / 2; return temp; } three_d three_d::operator()(int a, int b, int c) { three_d temp; temp.x = x + a; temp.y = y + b; temp.z = z + c; return temp; } ostream &operator<<(ostream &strm, three_d op) { strm << op.x << ", " << op.y << ", " << op.z << endl; return strm; } int main() { three_d objA(1, 2, 3), objB(10, 10, 10), objC; objC = objA(objB(100, 200, 300)); cout << objC; return 0; }

Q12

Which concepts does the Pre Increment use?

Q13

Which of the following operator can be used to overload when that function is declared as friend function?

Q14

How to store the large objects in c++ if it extends its allocated memory?

Q15

What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; int main(int argc, char const *argv[]) { char s1[6] = "Hello"; char s2[6] = "World"; char s3[12] = s1 + " " + s2; cout<<s3; return 0; }

Q16

What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; int main () { string str ("example."); str.front() = 'E'; cout << str << endl; return 0; }

Q17

Which is the correct example of a unary operator?

Q18

How to declare the complex number?

Q19

Which container in c++ will take large objects?

Q20

How many types of models are available to create the user-defined data type?

Q21

What will be the output of the following C++ code? #include <iostream> #include <string> #include <cstring> using namespace std; int main(int argc, char const *argv[]) { string s("a"); cout<<s; return 0; }

Q22

Given the following C++ code. How would you define the < operator for Box class so that when boxes b1 and b2 are compared in if block the program gives correct result? #include <iostream> #include <string> using namespace std; class Box { int capacity; public: Box(){} Box(double capacity){ this->capacity = capacity; } }; int main(int argc, char const *argv[]) { Box b1(10); Box b2 = Box(14); if(b1 < b2){ cout<<"Box 2 has large capacity."; } else{ cout<<"Box 1 has large capacity."; } return 0; }

Q23

What will be the output of the following C++ code? #include <iostream> using namespace std; class sample { public: sample(int i) : m_i(i) { } public: int operator()(int i = 0) const { return m_i + i; } operator int () const { return m_i; } private: int m_i; friend int g(const sample&); }; int f(char c) { return c; } int main() { sample f(2); cout << f(2); return 0; }

Q24

In case of non-static member functions how many maximum object arguments a binary operator overloaded function can take?

Q25

What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; int main () { string str ("microsoft"); string::reverse_iterator r; for (r = str.rbegin() ; r < str.rend(); r++ ) cout << *r; return 0; }

cpp - Part 40

Which of the following operator can be overloaded?

What will be the output of the following C++ code? #include <iostream> using namespace std; int main () { int a, b; a = 10; b = 4; a = b; b = 7; cout << "a:"; cout << a; cout << " b:"; cout << b; return 0; }

Which operator a pointer object of a class uses to access its data members and member functions?

What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; int main () { std::string str ("Example."); str.back() = '!'; std::cout << str << endl; return 0; }

The data members and functions of a class in C++ are by default . . . . . . . .

What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; int main () { string str = "HelloWorld!"; cout<<str.capacity(); cout<<str.size(); return 0; }

Which is the correct example of a binary operator?

How many arguments will the subscript operator will take for overloading?

Which concepts does the Pre Increment use?

Which of the following operator can be used to overload when that function is declared as friend function?

How to store the large objects in c++ if it extends its allocated memory?

What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; int main(int argc, char const *argv[]) { char s1[6] = "Hello"; char s2[6] = "World"; char s3[12] = s1 + " " + s2; cout<<s3; return 0; }

What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; int main () { string str ("example."); str.front() = 'E'; cout << str << endl; return 0; }

Which is the correct example of a unary operator?

How to declare the complex number?

Which container in c++ will take large objects?

How many types of models are available to create the user-defined data type?

What will be the output of the following C++ code? #include <iostream> #include <string> #include <cstring> using namespace std; int main(int argc, char const *argv[]) { string s("a"); cout<<s; return 0; }

In case of non-static member functions how many maximum object arguments a binary operator overloaded function can take?

What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; int main () { string str ("microsoft"); string::reverse_iterator r; for (r = str.rbegin() ; r < str.rend(); r++ ) cout << *r; return 0; }