Advanced C++ Interview Question To Hire Experienced Candidates

Advanced C++ Interview Question To Hire Experienced Candidates

PulkitApril 16th, 20214 min read

C++ is as important and relevant today as it was when it was first introduced in the mid-1980s, as a general-purpose computer language. As a result, a thorough understanding of C++ is needed for several positions.

Due to features like the pointer, it is the main language on Unix platforms, allowing programmers to build code that they can monitor.

If you are tasked with hiring a C++ Developer and don't know what to ask, don’t worry, you’re in the right place.

Concepts To Consider While Evaluating C++ Programmers

With that being said, C++ is regarded as one of the most difficult programming languages to master. As a result, when recruiting C++ developers, ensure they can do the following:

  • Ought to be familiar with operating systems such as Linux and Unix
  • important concepts such as Databases, SQL, and NoSQL
  • An understanding of JavaScript and XML
  • The agile software development methodology should be familiar to the applicant
  • Ability to use website development tools to create new programs
  • RDBMS databases are something the applicant should be well-versed with
  • An extensive understanding of testing tools, modern SCM, and methodologies is necessary
Other Things To Do While Preparing

Actively enquire if they are familiar with the above-mentioned languages and concepts. Apart from this, there are certain things you should do as well.

You should make sure you come with a list of C++ interview questions and answers that are relevant to the job description, beforehand. This way you are clear as to what to look for in a candidate.

Furthermore, using AI or different software for hiring is not a bad idea at all. With the help of online C++ code editors and live coding interview tools, hiring has become relatively efficient.

As per 2019 HR statistics by, it was seen that 6% of the brands use AI to improve the recruiting process and 24% of the brands stated that they are likely to invest in AI or recruitment software in the coming years.

These numbers should be good enough to make you understand the importance of hiring software. You can use code editors to test the skill level of the applicant and just that several other live interview tools to help you assess the candidate.

As mentioned earlier, preparing a list of C++ interview questions is important, which is why we are giving you a list of important questions to ask:

Advanced C++ Interview Questions You Must Ask To Hire Experienced Candidates
  1. Take a look at the following C++ program:

    using namespace std;
    int main()
     int numbers[5], sum = 0;
     cout << "Enter 5 numbers: ";
     for (int i = 0; i < 5; ++i)
        cin >> numbers[i];
        sum += numbers[i];
     cout << "Sum = " << sum << endl;
     return 0;

    What will be the output?
  2. What's the distinction between references and pointers?
  3. Give an example of virtual functions.
  4. What is the purpose of this pointer?
  5. Is it possible to "delete this"?
  6. What is the difference between VTABLE and VPTR? How does the compiler deal with the two?
  7. There are some significant differences between Java and C++.
  8. What exactly are control specifiers in C++?
  9. C++'s most important functionality
  10. Define the Copy Constructor used in C++ along with its general function prototype. Also, explain the various scenarios in which it is called.
  11. What are inline functions?
  12. Explain: Delete vs Free / Malloc() vs New
  13. What is the concept of inheritance?
  14. What exactly is a static member?
  15. What is a copy constructor?
  16. Explain: operator overloading vs function overloading?
  17. What is the function and friend class in C++?
  18. What does a destructor refer to?
  19. Is it possible to overload a destructor?
  20. Differentiate between the keyword class and strut?
  21. Explain abstract class in C++
  22. Is it possible to have a string primitive data type in C++?
  23. Is it possible to access specifiers to achieve data hiding in C++?
  24. Describe the functions of the scope resolution operator?
  25. Explain the function of the keyword “AUTO”
  26. Take a look at the following two code examples for printing a vector.

    Sample Code 1:
    vector vec;
    /* ... .. ... */
    for (auto itr = vec.begin(); itr != vec.end(); itr++) {

    Sample Code 2:
    vector vec;
    /* ... .. ... */
    for (auto itr = vec.begin(); itr != vec.end(); ++itr) {

    Is there any advantage of using one over the other?
  27. Explain the ‘diamond problem’ that happens with multiple inheritances in C++?
  28. What is the block scope variable?
  29. Compare C++ and JAVA script
  30. What is a reference variable?

These are some questions that will help you take an interview. All you have to do is make sure you familiarize yourself with the answer or you can even keep the printout of the answers next to you, but for the better part of it, make sure you grasp the concept even if not the whole subject.

Apart from taking technical interviews, the other main problem HRs face is finding candidates, which is why you should make use of live interview tools to help you find candidates to interview. Furthermore, technical assessment for C++ are boon, especially if you don’t know to program.

Developer assessment platforms like Codility, Intervue, and many others will help you take an interview and also help you in determining if the candidate is the right fit or not.

Summing Up

By now you should have a better idea of how to prepare yourself for interviewing candidates with expertise. Also, make sure you keep an eye out for other non-technical qualities that make them a good fit. With that being said, all you have to do is prepare yourself and start interviewing candidates.

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