80 interview questions on C++ for developers (2026)

Hard

6 votes544 runs0 comment

Which statement concerning constructors is false ?

Back-end developer

constructors

attributes

Samuelat Mar 28, 2022

Hard

5 votes319 runs0 comment

Write a C++ class with a constructor that takes two arguments.

Back-end developer

constructor

inheritance

Samuelat Mar 28, 2022

Hard

4 votes529 runs

1 comment

Write a C++ function that returns the sum of two integers.

Back-end developer

pointers

references

Abha Agrawaat Dec 3, 2021

Medium

3 votes518 runs0 comment

C++: what is the output of the following code? `std::cout << &obj << std::endl;`

Back-end developer

references

pointers

Abha Agrawaat Dec 3, 2021

Expert

3 votes434 runs0 comment

Write a C++ program that uses static variables.

Back-end developer

static

constructor

destructor

Samuelat Mar 28, 2022

Easy

3 votes412 runs0 comment

Which type should you use to represent a data list with a length that can change ?

Back-end developer

array

vector

Samuelat Mar 28, 2022

Expert

2 votes547 runs2 comments

What is the value of p1 and q1 in the following code? ```c++ int i = 0; int p = &i; int const p1 = &i; int const q1 = &p; ```

Back-end developer

pointers

references

Abha Agrawaat Mar 5, 2024

Hard

2 votes540 runs

1 comment

What is the difference between a friend and a friend function in C++?

Back-end developer

friend

class

Abha Agrawaat Dec 3, 2021

Medium

2 votes525 runs0 comment

What is the output of the following C++ code? #include <iostream> using namespace std; int main() { int a = 10, b = 20, c = 30; cout << a + b + c; return 0; }

Back-end developer

pointers

arrays

Abha Agrawaat Dec 3, 2021

Medium

2 votes497 runs0 comment

What is the output of the following C++ code?

Back-end developer

pointers

arrays

Abha Agrawaat Dec 3, 2021

Medium

2 votes478 runs

1 comment

Write a C++ program that creates an array of 10 Person objects.

Back-end developer

array

constructor

Abha Agrawaat Apr 7, 2023

Medium

2 votes457 runs1 comment

The operator + has been defined for Complexe objects thanks to an intern overloading.

Back-end developer

operators

overloading

Samuelat Mar 5, 2024

Easy

2 votes448 runs0 comment

What is the default visibility of class members in C++?

Back-end developer

classes

visibility

Samuelat Mar 28, 2022

Hard

2 votes421 runs0 comment

In C++, it is possible to give a default value to a parameter of a function and two functions can have the same name if their signatures are different but not only different on the return type.

Back-end developer

functions

parameters

return type

Samuelat Mar 28, 2022

Easy

2 votes401 runs0 comment

Write a C++ program to add two complex numbers.

Back-end developer

operators

classes

Samuelat Mar 28, 2022

Easy

2 votes400 runs0 comment

Write a C++ program that displays a memory address.

Back-end developer

memory

pointers

Samuelat Mar 28, 2022

Easy

2 votes391 runs0 comment

Print the message 'n = 10' in C++

Back-end developer

cout

iostream

Samuelat Mar 28, 2022

Hard

1 vote564 runs0 comment

What are templates in C++?

Back-end developer

templates

templates-c++

Abha Agrawaat Dec 3, 2021

Hard

1 vote547 runs0 comment

Which of the following sets of code will cause a compile time error?

Back-end developer

c++

compile time error

Abha Agrawaat Dec 3, 2021

Hard

1 vote543 runs1 comment

What is the result of the following code? #define CONSTANT 10; int main() { return CONSTANT; }

Back-end developer

preprocessor

header

constants

Abha Agrawaat Nov 8, 2023

80 interview questions on C++for developers (2026)

Test your technical skills before an interview of C++ with 80 corrected questions. Beginner, Intermediate or Expert level.

Which statement concerning constructors is false ?

Write a C++ class with a constructor that takes two arguments.

Write a C++ function that returns the sum of two integers.

C++: what is the output of the following code? `std::cout << &obj << std::endl;`

Write a C++ program that uses static variables.

Which type should you use to represent a data list with a length that can change ?

What is the value of p1 and q1 in the following code? ```c++ int i = 0; int p = &i; int const p1 = &i; int const q1 = &p; ```

What is the difference between a friend and a friend function in C++?

What is the output of the following C++ code? #include <iostream> using namespace std; int main() { int a = 10, b = 20, c = 30; cout << a + b + c; return 0; }

What is the output of the following C++ code?

Write a C++ program that creates an array of 10 Person objects.

The operator + has been defined for Complexe objects thanks to an intern overloading.

What is the default visibility of class members in C++?

In C++, it is possible to give a default value to a parameter of a function and two functions can have the same name if their signatures are different but not only different on the return type.

Write a C++ program to add two complex numbers.

Write a C++ program that displays a memory address.

Print the message 'n = 10' in C++

What are templates in C++?

Which of the following sets of code will cause a compile time error?

What is the result of the following code? #define CONSTANT 10; int main() { return CONSTANT; }

80 interview questions on C++for developers (2026)

Test your technical skills before an interview of C++ with 80 corrected questions. Beginner, Intermediate or Expert level.

Which statement concerning constructors is false ?

Write a C++ class with a constructor that takes two arguments.

Write a C++ function that returns the sum of two integers.

C++: what is the output of the following code? `std::cout << &obj << std::endl;`

Write a C++ program that uses static variables.

Which type should you use to represent a data list with a length that can change ?

What is the value of p1 and q1 in the following code? ```c++ int i = 0; int *p = &i; int *const p1 = &i; int *const q1 = &*p; ```

What is the difference between a friend and a friend function in C++?

What is the output of the following C++ code? #include <iostream> using namespace std; int main() { int a = 10, b = 20, c = 30; cout << a + b + c; return 0; }

What is the output of the following C++ code?

Write a C++ program that creates an array of 10 Person objects.

The operator + has been defined for Complexe objects thanks to an intern overloading.

What is the default visibility of class members in C++?

In C++, it is possible to give a default value to a parameter of a function and two functions can have the same name if their signatures are different but not only different on the return type.

Write a C++ program to add two complex numbers.

Write a C++ program that displays a memory address.

Print the message 'n = 10' in C++

What are templates in C++?

Which of the following sets of code will cause a compile time error?

What is the result of the following code? #define CONSTANT 10; int main() { return CONSTANT; }

What is the value of p1 and q1 in the following code? ```c++ int i = 0; int p = &i; int const p1 = &i; int const q1 = &p; ```