Why C++ is widely used - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print a message about C++ usage.

C++

#include <iostream>

int main() {
    std::cout << "C++ is widely used because it is [1]." << std::endl;
    return 0;
}

Drag options to blanks, or click blank then click option'

Aobsolete

Bslow

Cfast

Dcomplicated

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'slow' or 'obsolete' which are incorrect descriptions.

C++ is known for its speed and efficiency, which makes it widely used.

2fill in blank

medium

Complete the code to declare a variable showing C++'s feature.

C++

#include <iostream>

int main() {
    bool isObjectOriented = [1];
    std::cout << "C++ supports object-oriented programming: " << isObjectOriented << std::endl;
    return 0;
}

Drag options to blanks, or click blank then click option'

Atrue

B0

C"yes"

DFalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using string "yes" instead of boolean true.

C++ supports object-oriented programming, so the boolean variable should be true.

3fill in blank

hard

Fix the error in the code to correctly define a function that returns C++'s main advantage.

C++

#include <string>

std::string mainAdvantage() {
    return [1];
}

Drag options to blanks, or click blank then click option'

A42

B"performance"

Cperformance

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Returning an unquoted word causing a compile error.

The function returns a string, so the return value must be a string literal in quotes.

4fill in blank

hard

Fill both blanks to create a map of C++ features and their descriptions.

C++

#include <iostream>
#include <map>
#include <string>

int main() {
    std::map<std::string, std::string> features = {
        {"[1]", "Supports low-level memory manipulation"},
        {"[2]", "Supports object-oriented programming"}
    };
    for (const auto& [key, value] : features) {
        std::cout << key << ": " << value << std::endl;
    }
    return 0;
}

Drag options to blanks, or click blank then click option'

APointers

BInheritance

CTemplates

DGarbage Collection

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'Garbage Collection' which C++ does not have by default.

Pointers allow low-level memory manipulation, and inheritance is a key object-oriented feature in C++.

5fill in blank

hard

Fill all three blanks to create a function that returns a feature description based on input.

C++

#include <string>

std::string featureDescription(const std::string& feature) {
    if (feature == "[1]") {
        return "Allows code reuse and polymorphism.";
    } else if (feature == "[2]") {
        return "Enables generic programming.";
    } else if (feature == "[3]") {
        return "Provides control over system resources.";
    } else {
        return "Unknown feature.";
    }
}

Drag options to blanks, or click blank then click option'

AInheritance

BTemplates

CPointers

DGarbage Collection

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing garbage collection with pointers or templates.

Inheritance allows polymorphism, templates enable generic programming, and pointers provide control over system resources.