C++ Quizzes

What is the correct syntax to output My first C++ program?

How do you create a variable with a decimal value of 4.6 in C++?

(one or more answers)

Select the appropriate data type for this value: true

What is the output for a?

#include <iostream>
using namespace std;

int main() {
    int a = 10;
    double d = 2.5;

    a = d;
    cout << a;

    return 0;
}

What is the output for a?

#include <iostream>
using namespace std;

int main() {
    short int a = 33000;

    cout << a;

    return 0;
}

Which operator can be used to increment a value?

What is the output for result?

#include <iostream>
using namespace std;

int main() {
    int a = 4;
    int b = 7;
    int c = 9;
    int result;

    result = ++a + --c * b;

    cout << result;

    return 0;
}

What is the output for result?

#include <iostream>
using namespace std;

int main() {
    int a = 6;
    int b = 2;
    int result;

    result = --a * b++;

    cout << result;

    return 0;
}

Which operator can be used to check two values for inequality?

What is the output for result?

#include <iostream>
using namespace std;

int main()
{
    int a = 100;
    int b = 40;
    int c = 7;
    int result;

    result = a % b % c;

    cout << result;

    return 0;
}

What is the output for result?

#include <iostream>
using namespace std;

int main() {
    int a = 5;
    int b = 7;
    int c = 5;
    int result;

    a += c;
    b += c;

    result = (a + b) % 4;

    cout << result;

    return 0;
}

What is the output for isSet?

#include <iostream>
using namespace std;

int main() {
    int x = 3;
    int y = 6;
    int z = 4;
    bool isSet = true;

    if (x < z && y >= z && x > z || isSet == true) {
        isSet = false;
    }

    cout << isSet;

    return 0;
}

What is the output for isSet?

#include <iostream>
using namespace std;

int main() {
    int a = 50, b = 10, c = 20;
    if (c < b < a) {
        cout << "True";
    } else {
        cout << "False";
    }

    return 0;
}

What is the output for x?

#include <iostream>
using namespace std;

int main() {
    int x, a = 11, b = 12;
    x = a | b;

    cout << x;

    return 0;
}

What is the output for y?

#include <iostream>
using namespace std;

int main() {
    int x, y, a = 10, b = 14, c = 2;

    y = a ^ c;

    cout << y;

    return 0;
}

What is the output for y?

#include <iostream>
using namespace std;

void fun(int val) {
    if (val > 16) {
        return;
    }

    cout << val;
    fun(val + 2);
}

int main() {
    fun(6);

    return 0;
}

Which is the correct way to write a comment in C++?

(one or more answers)

Which is the correct way to write a multi line comment in C++?

What is the output?

#include <iostream>
using namespace std;

int main() {
    int a = 5, b = 6;

    if (a >= b) {
        cout << a;
    } else {
        cout << b;
    }

    return 0;
}

What is the output for c?

#include <iostream>
using namespace std;

int main() {
    int a = 2, b = 5, c = 0;

    while (c < 10) {
        if (a < b) {
            a++;
            c = c + 3;
        } else {
            c = c + 2;
        }
    }

    cout << c;

    return 0;
}

What is the output?

#include <iostream>
using namespace std;

int main() {
    int a = 0;
    double b = 0.0;

    bool output = a == b ? true : false;
    
    cout << output;

    return 0;
}

Which is the correct way to print a double quote (") in C++?

Which is the correct way to print a vertical tab in C++?

What is the output for a?

#include <iostream>
using namespace std;

int main() {
    int a = 4, b = 12;

    while (b > a) {
        a++;
        if (a % 5 == 1) {
            break;
        }
    }

    cout << a;

    return 0;
}

What is the output?

#include <iostream>
using namespace std;

int main() {
    string s1 = "hello world";
    string s2 = "hello World";
    bool comp = !s1.compare(s2);
    cout << comp;

    return 0;
}

What is the output?

#include <iostream>
using namespace std;

int main() {
    int x = 6, y = 9, temp;

    temp = x;
    y++;
    temp--;
    x = y;
    y = temp;

    cout << x << ", " << y;

    return 0;
}

Multiple inheritance is not supported in C++?

What is the output for x (how many loop passes)?

#include <iostream>
using namespace std;

int main() {
    double a = 15, b = 6;
    int x = 0;

    while (a > b) {
        a--;
        b = b + 3;
        x++;
    }

    cout << x;

    return 0;
}

What is the output?

#include <iostream>
using namespace std;

int add(int a, int b) {
    int result;
    result = a + b;
    return result;
}

int main() {
    cout << add(5, 3);

    return 0;
}

What is the output?

#include <iostream>
using namespace std;

int add(int a, int b) {
    int result;
    result = a + b;
    return result;
}

int main() {
    cout << add(5.5, 3.3);

    return 0;
}

What is the output?

#include <iostream>
using namespace std;

int add(int x = 12) {
    return x + 1;
}

int main() {
    cout << add(5);

    return 0;
}

What is the output for currentNumber?

#include <iostream>
using namespace std;

int main() {
    int numbers[] = {5, 6, 12, 9, 5, 18, 10, 5, 3, 19, 14};
    int i = 0, currentNumber;

    currentNumber = numbers[0];

    for (i = 1; i < 10; i++) {
        if (currentNumber < numbers[i]) {
            currentNumber = numbers[i];
        }
    }

    cout << currentNumber;
    return 0;
}

What is the output?

#include <iostream>
using namespace std;

int main() {
    int myArray[3][2];

    myArray[1][0] = 4;
    myArray[1][1] = 5;
    myArray[0][0] = 9;
    myArray[0][1] = 2;
    myArray[2][0] = 1;
    myArray[2][1] = 8;

    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 2; j++) {
            cout << myArray[i][j];
        }
    }
    return 0;
}

What is the output?

#include <iostream>
using namespace std;

class Animal {
    public: 
        Animal() {
            cout << "This is an Animal" << endl;
        }
};

class Dog: public Animal {
    public:
        Dog() {
            cout << "This is a Dog" << endl;
        }
};

int main() {
    Animal obj;
    return 0;
}

What is the output?

#include <iostream>
using namespace std;

class Animal {
    public: 
        Animal() {
            cout << "This is an Animal" << endl;
        }
};

class Dog: public Animal {
    public:
        Dog() {
            cout << "This is a Dog" << endl;
        }
};

int main() {
    Dog obj;
    return 0;
}

What is the output?

#include <iostream>
using namespace std;

class Animal {
    public: 
        Animal() {
            cout << "This is an Animal" << endl;
        }
};

class Dog {
    public:
        Dog() {
            cout << "This is a Dog" << endl;
        }
};

class Cat: public Animal, public Dog {
    public:
        Cat() {
            cout << "This is a Cat" << endl;
        }
};

int main() {
    Dog obj;
    return 0;
}

What is the output?

#include <iostream>
using namespace std;

class Animal {
    public: 
        Animal() {
            cout << "This is an Animal" << endl;
        }
};

class Dog {
    public:
        Dog() {
            cout << "This is a Dog" << endl;
        }
};

class Cat: public Animal, public Dog {
    public:
        Cat() {
            cout << "This is a Cat" << endl;
        }
};

int main() {
    Cat obj;
    return 0;
}

What is the output?

#include <iostream>
using namespace std;

class Animal {
    public: 
        Animal() {
            cout << "This is an Animal ";
        }
};

class Dog: public Animal {
    public:
        Dog() {
            cout << "This is a Dog ";
        }
};

class Cat: public Dog {
    public:
        Cat() {
            cout << "This is a Cat ";
        }
};

int main() {
    Cat obj;
    return 0;
}

What is the output?

#include <iostream>
using namespace std;

class Animal {
    public: 
        Animal() {
            cout << "This is an Animal ";
        }
};

class Dog: public Animal {
    public:
        Dog() {
            cout << "This is a Dog ";
        }
};

class Cat: public Dog {
    public:
        Cat() {
            cout << "This is a Cat ";
        }
};

int main() {
    Dog obj;
    return 0;
}

What is the output?

#include <iostream>
using namespace std;

class Animal {
    public: 
        Animal() {
            cout << "This is an Animal ";
        }
};

class Dog: public Animal {
    public:
        Dog() {
            cout << "This is a Dog ";
        }
};

class Cat: public Animal {
    public:
        Cat() {
            cout << "This is a Cat ";
        }
};

int main() {
    Cat obj;
    return 0;
}

What is the output?

#include <iostream>
using namespace std;

void sum(int a, int b) {
	cout << a + b << " ";
}

void sum(int a, int b, int c) {
	cout << a + b + c << " ";
}

void sum(double a, double b) {
	cout << a + b << " ";
}

int main() {
	sum(6, 7);
	sum(5, 2, 32);
	sum(9.4, 4.6);
    
	return 0;
}

What is the output?

#include <iostream>
using namespace std;

void sum(int a, int b, int c) {
	cout << a + b + c << " ";
}

void sum(double a, double b) {
	cout << a + b << " ";
}

int main() {
	sum(6, 7);
	sum(9, 4, 3);
    
	return 0;
}

What is the output?

#include <iostream>
using namespace std;

void sum(int a, int b, int c) {
	cout << a + b + c << " ";
}

void sum(double a, double b) {
	cout << a + b << " ";
}

int main() {
	sum(6, 7);
	sum(6.2, 4.5, 2.3);
    
	return 0;
}

What is the output?

#include <iostream>
using namespace std;

class A {
public:
    virtual void print() {
        cout << "class a output" << endl;
    }
};

class B : public A {
public:
    void print() {
        cout << "class b output" << endl;
    }
};

class C : public A {
public:
    void print() {
        cout << "class c output" << endl; } }; int main(void) { A *a; C c; a = &c; a->print();

    return 0;
}

What is the output?

#include <iostream>
using namespace std;

class A {
public:
    virtual void print() {
        cout << "class a output" << endl;
    }
};

class B : public A {
public:
    void print() {
        cout << "class b output" << endl;
    }
};

class C : public A {
public:
    void print() {
        cout << "class c output" << endl; } }; int main(void) { A *a; B *b; a = b; a->print();

    return 0;
}

What is the output?

#include <iostream>
using namespace std;

class A {
public:
    void print() {
        cout << "overridden method" << endl;
    }
};

class B : public A {
public:
    void print() {
        cout << "overriding method" << endl;
    }
};

int main(void) {
    B b = B();
    
    b.print();

    return 0;
}

What is the output?

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    double min, max;
    int a = 4, b = 6;

    min = fmin(a, b);
    max = fmax(a, b);

    cout << min << ", " << max << endl;

    return 0;
}

What is the output?

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    double ma, dim;
    int a = 4, b = 6, c = 3;

    // x*y+z without losing precision
    ma = fma(a, b, c);
    // positive difference of two floating point values
    dim = fdim(b, c);

    cout << ma << ", " << dim << endl;

    return 0;
}

What is the output for rounding?

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    double value = 2.51245;

    // Round to nearest
    double rounding = round(value);

    cout << rounding << endl;

    return 0;
}

What is the output for rounding?

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    double value = 2.41245;

    // Round to nearest
    double rounding = floor(value);

    cout << rounding << endl;

    return 0;
}

What is the output for rounding?

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    double value = 2.41245;

    // Round to nearest
    double rounding = ceil(value);

    cout << rounding << endl;

    return 0;
}

What is the output for rounding?

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    double value = 2.41245;

    // Round to nearest
    double rounding = trunc(value);

    cout << rounding << endl;

    return 0;
}

What is the output?

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    cout << pow(3, 3) << endl;

    return 0;
}

What is the output?

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    cout << sqrt(81) << endl;

    return 0;
}

What is the output?

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    cout << cbrt(216) << endl;

    return 0;
}

C++ supports primarily static, but also dynamic type checking!

C++ is a weakly-typed system!

C++ is a type-safe language!

C++ supports both manifest and inferred typing!

What is the output for sum?

#include <iostream>
using namespace std;

int main() {
    int sum = 0;

    for (int i = 0, j = 2; i < 6 & j < 10; i = j - i, j++) {
        sum += j;
    }

    cout << sum;

    return 0;
}

What is the output?

#include <iostream>
using namespace std;

int fun(int a, int b) {
    if (a == 0) {
        return b;
    } else {
        return a + fun(a - 1, b);
    }
}

int main() {
    cout << fun(1, 2);

    return 0;
}

What is the output?

#include <iostream>
using namespace std;

class Test {
    private:
        void privPrint() {
            cout << "A, ";
        }
    public:
        void pubPrint() {
            cout << "B, ";
        }
    protected:
        void protPrint() {
            cout << "C" << endl;
        }
};

int main() {
    Test t1;

    t1.privPrint();
    t1.pubPrint();
    t1.protPrint();

    return 0;
}

What is the output?

#include <iostream>
using namespace std;

class Test {
    private:
        void privPrint() {
            cout << "A, ";
        }
    public:
        void pubPrint() {
            cout << "B, ";
        }
    protected:
        void protPrint() {
            cout << "C" << endl;
        }
};

int main() {
    Test t1;

    t1.pubPrint();
    t1.protPrint();

    return 0;
}

What is the output?

#include <iostream>
using namespace std;

class Test {
    private:
        void privPrint() {
            cout << "A";
        }
    public:
        void pubPrint() {
            cout << "B";
        }
    protected:
        void protPrint() {
            cout << "C" << endl;
        }
};

int main() {
    Test t1;

    t1.pubPrint();

    return 0;
}