C++ Interview Questions

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1. What is C++?
2. Differentiate declaration and definition?
3. Explain what is a class in C++?
4. How can you specify a class in C++?
5. What is the difference between realloc() and free()?
6. Define an inline function?
7. What is the difference between an ARRAY and a LIST?
8. What is a template?
9. What are the features of C++ different from C?
10. What are tokens in C++?
11. Define Constructors?
12. Define destructors?
13. Differentiate between Object and Instance?
14. What do you mean by reference variable in C++?
15. What are the basic elements of a function in C++?
16. Explain what is Loop function? What are different types of Loops?
17. Explain C++ exceptional handling?
18. Mention what are the types of Member Functions?
19. Explain what is multi-threading in C++?
20. Explain upcasting in C++?
21. Explain what is pre-processor in C++?
22. What is namespace std?
23. What is the difference between prefix and postfix versions of operator ++()?
24. What is public, protected and private?
25. What are the basic components of a class?
26. What do you mean by ‘void’ return type?
27. State the dissimilarity between delete and delete[]?
28. What is a Storage Class? Mention the Storage Classes in C++.
29. What do you mean by persistent and non-persistent objects?
30. What are the Comments in C++?
31. How do you define/declare constants in C++?
32. What is the difference between equal to (==) and Assignment Operator (=)?
33. What is a Reference Variable in C++?
34. What are the Extraction and Insertion operators in C++? Explain with examples.
35. Explain Pass by value and Pass by reference?
36. What is a Static Variable?
37. What is Structure?
38. What is Namespace?
39. Enlist the difference between Method Overloading and Method Overriding in C++?
40. List the various OOPs concepts in C++?
41. Define data abstraction in C++?
42. Define encapsulation?
43. Explain the main difference between a class and an object?
44. Define inheritance?
45. Define abstract class in C++?
46. Name the data type which can be used to store wide characters in C++.
47. Explain Inheritance in C++?
48. Give the full form of STL in C++?
49. When should we use multiple inheritance?
50. Give the difference between structures and class?

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ABOUT THE AUTHOR

Rashmi Bhardwaj

Founder of AAR TECHNOSOLUTIONS, Rashmi is an evangelist for IT and technology. With more than 12 years in the IT ecosystem, she has been supporting multi domain functions across IT & consultancy services, in addition to Technical content making.

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