C++ Language Test 4

Which operator in C++ is used to determine the size of a data type or variable?

Which of the following is the compound assignment operator in C++?

What is the correct way to declare a pointer to a pointer of an integer?

Which of the following is NOT true about the switch statement in C++?

What does the break statement do in a C++ loop?

What will happen when this program runs?

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

int main() {
    ofstream file("log.txt", ios::app);
    file << "New Entry\n";
    file.close();
    return 0;
}

Which function declaration is valid with default arguments?

How do you correctly declare a 2D array with 3 rows and 4 columns in C++?

Why do we use virtual functions in C++?

Which operator can be used to compare two strings in C++?

What will be the output of the following C++ code snippet?

#include <iostream>
using namespace std;
int main() {
    int a = 7, b = 2;
    double result = (double)a / b;
    cout << result;
    return 0;
}

What will be the output of the following C++ code snippet?

#include <iostream>
using namespace std;
int main() {
    int x = 6, y = 3;
    cout << (x & y);
    return 0;
}

What will the following program print?

#include <iostream>
using namespace std;

int main() {
    int val = 50;
    int *p = &val;
    int **pp = &p;
    cout << **pp;
    return 0;
}

What will be the output of the following C++ code snippet?

#include <iostream>
using namespace std;
int main() {
    int day = 3;
    switch(day) {
        case 1: cout << "Monday"; break;
        case 2: cout << "Tuesday"; break;
        case 3: cout << "Wednesday"; break;
        default: cout << "Invalid";
    }
    return 0;
}

What will be the output of the following C++ code snippet?

#include <iostream>
using namespace std;
int main() {
    for (int i = 1; i <= 5; i++) {
        if (i == 3) break;
        cout << i << " ";
    }
    return 0;
}

Which flag is used to open a file in binary mode?

What is the purpose of an inline function in C++?

What will be the output of the following code?

#include <iostream>
using namespace std;

int main() {
    int arr[2][2] = { {1, 2}, {3, 4} };
    cout << arr[1][0];
    return 0;
}

What will be the output of this program?

#include <iostream>
using namespace std;

class Base {
public:
    virtual void show() { cout << "Base"; }
};

class Derived : public Base {
public:
    void show() { cout << "Derived"; }
};

int main() {
    Base *b;
    Derived d;
    b = &d;
    b->show();
    return 0;
}

What will the output of the following code be?

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

int main() {
    string s = "Code";
    s.append("Lab");
    cout << s;
    return 0;
}