MCQ Exam Test

Q1

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

Q2

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; }

Q3

How to declare the complex number?

Q4

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; }

Q5

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

Q6

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; }

Q7

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

Q8

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; }

Q9

Which container in c++ will take large objects?

Q10

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; }

Q11

Which is the correct example of a binary operator?

Q12

Which is the correct example of a unary operator?

Q13

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

Q14

Which of the following operator can be overloaded?

Q15

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

Q16

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; }

Q17

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; }

Q18

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; }

Q19

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

Q20

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; }

Q21

#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; }

Q22

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; }

Q23

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; }

Q24

Which concepts does the Pre Increment use?

Q25

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

cpp - Part 40

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

How to declare the complex number?

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

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

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; }

Which container in c++ will take large objects?

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; }

Which is the correct example of a binary operator?

Which is the correct example of a unary operator?

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

Which of the following operator can be overloaded?

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 ("example."); str.front() = 'E'; cout << str << endl; return 0; }

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; }

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> #include <cstring> using namespace std; int main(int argc, char const *argv[]) { string s("a"); cout<<s; return 0; }

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; }

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; }

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?