Programming in C++ Interview Questions

S.No Question
1. What is a class in C++? Explain the concept of encapsulation.
2. What is an object in C++? How is it different from a class?
3. Explain the difference between a member variable and a member function in a class.
4. What is a constructor in C++? How is it different from a regular member function?
5. What is a destructor in C++? When is it called?
6. How do you create an instance of a class in C++?
7. Explain the concept of access specifiers (public, private, protected) in C++.
8. What is the difference between a default constructor and a parameterized constructor?
9. How do you perform input and output operations in C++?
10. Explain the difference between the extraction (>>) and insertion (<<) operators.
11. How do you read and write data from/to a file in C++?
12. What is a copy constructor in C++? When is it called?
13. Explain the concept of the default constructor and its role in object initialization.
14. What is the difference between constructor overloading and function overloading in C++?
15. What is a static variable in C++? How is it different from a regular member variable?
16. Explain the concept of static function in a class.
17. What is the purpose of the static keyword in C++?
18. What is function overloading in C++? Provide an example.
19. Can you overload the assignment operator (=) in C++? Explain why or why not.
20. Explain the concept of operator overloading in C++.
21. What is inheritance in C++? Why is it useful?
22. Explain the difference between single inheritance and multiple inheritance in C++.
23. How do you prevent a class from being inherited in C++?
24. What is the purpose of the virtual keyword in C++ inheritance?
25. Explain the concept of an abstract class in C++.
26. What is polymorphism in C++? Explain with an example.
27. How do you achieve runtime polymorphism in C++?
28. What is the difference between static binding and dynamic binding in C++?
29. Explain the concept of virtual functions and function overriding in C++.
30. What is function overriding in C++? Provide an example.
31. Explain the concept of a base class and a derived class in C++.
32. Does C++ have a super keyword like Java? Explain.
33. What is a friend function in C++? How do you declare and use it?
34. What is the difference between a friend function and a member function in a class?
35. What is operator overloading in C++? Provide examples.
36. Can you overload the logical operators (&& and ||) in C++? Explain why or why not.
37. What is a virtual function in C++? How do you declare and use it?
38. What is the purpose of the virtual keyword in front of a member function?
39. How do you read from a file in C++? Provide examples.
40. How do you write to a file in C++? Provide examples.
41. What are the file opening modes in C++?
42. What are templates in C++? How do you define and use them?
43. Explain the difference between function templates and class templates in C++.
44. Can you specialize a function template in C++? Explain why or why not.

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