C++ Common Interview Questions

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  1. What is C++?
  2. What are the differences between C and C++?
  3. What is object-oriented programming (OOP) and how is it implemented in C++?
  4. What are the basic data types in C++?
  5. What is a pointer in C++?
  6. What is the difference between a pointer and a reference in C++?
  7. What is a constructor and a destructor in C++?
  8. What is the difference between a shallow copy and a deep copy in C++?
  9. What is inheritance in C++ and how is it implemented?
  10. What is polymorphism in C++ and how is it implemented?
  11. What is an abstract class in C++?
  12. What is a virtual function in C++ and how is it used?
  13. What is an STL in C++?
  14. What are containers, iterators, and algorithms in STL?
  15. What is the difference between a vector and an array in C++?
  16. What is a template in C++?
  17. What is the difference between a class template and a function template in C++?
  18. What is operator overloading in C++ and how is it implemented?
  19. What is exception handling in C++ and how is it used?
  20. What is a memory leak in C++ and how is it avoided?
  21. What is the difference between a shallow copy and a deep copy in C++?
  22. What is the difference between a virtual function and a pure virtual function in C++?
  23. How does the virtual destructor work in C++?
  24. What is the diamond problem in C++ and how is it resolved?
  25. What is the difference between a class and a struct in C++?
  26. What is an iterator in C++ and how is it used?
  27. What is a lambda function in C++?
  28. What is a smart pointer in C++ and how is it used?
  29. What is the difference between a shared_ptr and a unique_ptr in C++?
  30. What is the difference between a constant pointer and a pointer to a constant in C++?
  31. What is the difference between a const reference and a reference to a const in C++?
  32. What is the difference between a function overloading and a function overriding in C++?
  33. What is the difference between a namespace and a class in C++?
  34. What is the difference between stack and heap memory allocation in C++?
  35. What is the difference between static and dynamic binding in C++?
  36. What is a pure function in C++?
  37. What is a recursive function in C++?
  38. What is the difference between a template class and a template function in C++?
  39. What is the difference between a friend class and a friend function in C++?
  40. What is the difference between pass-by-value and pass-by-reference in C++?
  41. What is a const object in C++ and how is it used?
  42. What is an inline function in C++?
  43. What is the difference between a header file and a source file in C++?
  44. What is a volatile variable in C++?
  45. What is a mutable keyword in C++?
  46. What is a default constructor and how is it used in C++?
  47. What is the most efficient way to read a large text file in C++?
  48. How can you check if a number is a power of 2 in C++?
  49. What is a bitset in C++ and how is it used?
  50. How can you detect and handle stack overflow in C++?

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