Introduction to C++ - Quiz

Which statement best describes C++?

Who created C++ and where was it first developed?

Which C++ feature is MOST associated with code reuse and modular design?

Which standard introduced the first official ISO C++ standard?

Compared to C, which capability is a key addition in C++?

Which choice is the BEST reason to use an IDE when learning C++?

In a minimal C++ program, what is the purpose of the function named main?

Which phase of the build pipeline resolves external function calls into final addresses?

Which real-world application commonly uses C++ for its performance and low-level control?

Which modern C++ feature helps manage memory automatically and safely?

Include the correct header to use std::cout

Complete the line to declare main with the correct return type

Use the C++ compiler to build hello.cpp into an executable named hello

What is the output of this code?

1#include <iostream>
2using namespace std;
3
4class Animal {
5public:
6    void speak() {
7        cout << "Animal speaks" << endl;
8    }
9};
10
11class Dog : public Animal {
12public:
13    void speak() {
14        cout << "Dog barks" << endl;
15    }
16};
17
18int main() {
19    Dog d;
20    d.speak();
21    return 0;
22}

What does this program print?

1#include <iostream>
2
3int main() {
4    int *p = new int(42);
5    std::cout << *p << std::endl;
6    delete p;
7    return 0;
8}

What is the output of this C++ vs C style example?

1#include <iostream>
2
3void greet_c() {
4    std::cout << "Hello from C style" << std::endl;
5}
6
7class Greeter {
8public:
9    void greet_cpp() {
10        std::cout << "Hello from C++ style" << std::endl;
11    }
12};
13
14int main() {
15    greet_c();
16    Greeter g;
17    g.greet_cpp();
18    return 0;
19}

What is the output after compiling with optimizations disabled?

1#include <iostream>
2
3int add(int a, int b) {
4    return a + b;
5}
6
7int main() {
8    int x = 3;
9    int y = 4;
10    std::cout << add(x, y) << std::endl;
11    return 0;
12}

What does this program print about the compilation process?

1#include <iostream>
2
3void step(const char* msg) {
4    std::cout << msg << std::endl;
5}
6
7int main() {
8    step("1. Preprocessing");
9    step("2. Compilation");
10    step("3. Assembly");
11    step("4. Linking");
12    return 0;
13}

Find the bug related to memory management in this C-style code

Click on the line(s) that contain the bug.

#include <cstdlib>

int main() {

    int *data = (int*)std::malloc(5 * sizeof(int));

    for (int i = 0; i < 5; ++i) {

        data[i] = i;

    }

    // process data

    return 0;

}

Find the bug in this first C++ program using std::cout

Click on the line(s) that contain the bug.

#include <iostream>

int main() {

    cout << "Hello" << std::endl;

    return 0;

}

Click the line that causes a potential leak when an early return happens

Click on the line to select.

void init_system(bool fail) {

    int* buffer = new int[100];

    // initialize buffer

    if (fail) return; // early exit

    delete[] buffer;

}

Click the line where the C++ program actually starts executing

Click on the line to select.

#include <iostream>

void helper() {

    std::cout << "Helper" << std::endl;

}

int main() {

    helper();

    std::cout << "Main" << std::endl;

    return 0;

}

Complete the Hello World program

Fill in the C++ class and object usage

Complete the use of std::vector from the STL

Fill in the RAII-style smart pointer example

Match the compilation stage with its main responsibility

Click an item on the left, then click its match on the right. Click a matched item to unmatch.

Match each tool with its typical role in a C++ environment

Click an item on the left, then click its match on the right. Click a matched item to unmatch.

Order the steps to compile and run a simple C++ program from the command line

Drag and drop to reorder, or use the arrows.

Order these actions when setting up a C++ environment with VS Code and GCC

Drag and drop to reorder, or use the arrows.