11# ⚫ OOP in Tech Interviews 2024: 39 Must-Know Questions & Answers
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3- ** Object-Oriented Programming** is recognized for enabling structured and scalable code in tech .
3+ ** Object-Oriented Programming** is a paradigm centered on "objects" with data (attributes) and code (methods). Key principles include encapsulation, inheritance, polymorphism, and abstraction. In interviews, OOP questions assess candidate's understanding of design patterns, class relationships, and software organization .
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5- Check out our carefully selected list of ** basic** and ** advanced** OOP questions to be well-prepared for your tech interviews in 2024.
5+ Check out our carefully selected list of ** basic** and ** advanced** OOP questions and answers to be well-prepared for your tech interviews in 2024.
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7- ![ OOP Decorative Image] ( https://firebasestorage .googleapis.com/v0/b/ dev-stack-app.appspot.com/o/ blogImg%2FoopBlogImg .png?alt=media&token=6162bebd-1639-4378-a4ce-bc2f13e4ffe6&_gl=1*ijb4zt*_ga*OTYzMjY5NTkwLjE2ODg8NDM8Njg.*_ga_CW55HF8NVT*MTY5ODMxNjI0Ny4xODEuMS4xNjk8MzE6OTY0LjM6LjAuMA.. )
7+ ![ OOP Decorative Image] ( https://storage .googleapis.com/dev-stack-app.appspot.com/blogImg/oop .png?GoogleAccessId=firebase-adminsdk-bgeaf%40dev-stack-app.iam.gserviceaccount.com&Expires=1698607493&Signature=ExEb8N3yQFspmVVp1s%2B%2B1SHslcl42LY6iCFgn4DlAs0%2FB%2BCxsddH7pJC9qe5NZ2JuZsl7o42XjMWoA2J6TJaP%2B7WX6BC2stfWiQtxvQdW0ZAhoKG5%2FiMAM6ccIFG8akw0891WJotbEY1%2FQDjl9vbcu933d4Nusbbbi%2FZLEolhGgY%2F8JWbxDNONMhK5cuzabq2JV0JRtjPU6dtutP3L7lU4l1ZnlCH3lUUTzw1WNjG2CfzzHofg0coopaV15qrFx7dCswKLm%2BgF6YtuaOgxKYLScVLXChAlhhMbbdUhYnk5ErYuUzbixQzf1ZbswFzdS%2FGMH1irf5kWk%2FbuicJr6%2BPA%3D%3D )
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99👉🏼 You can also find all answers here: [ Devinterview.io - OOP] ( https://devinterview.io/dev/oop-interview-questions )
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@@ -149,7 +149,6 @@ In the example:
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153152## 🔹 2. What is the difference between _ Procedural_ and _ Object-Oriented_ programming?
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155154### Answer
@@ -240,7 +239,6 @@ public class Main {
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244242## 🔹 3. What is a _ Class_ ?
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246244### Answer
@@ -308,7 +306,6 @@ for _ in range(15):
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312309## 🔹 4. What is an _ Object_ ?
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314311### Answer
@@ -345,7 +342,6 @@ myDog = Dog("Buddy", "Golden Retriever")
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349345## 🔹 5. Explain the _ Hierarchical Relationship_ between classes.
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351347### Answer
@@ -402,7 +398,6 @@ class Penguin(Bird):
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406401## 🔹 6. What is the difference between a _ Method_ and a _ Function_ in the context of _ OOP_ ?
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408403### Answer
@@ -433,7 +428,6 @@ While all methods are functions in a broader sense, not all functions are method
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437431## 🔹 7. What is _ Inheritance_ ? Name some _ Types of Inheritance_ .
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439433### Answer
@@ -533,7 +527,6 @@ class J extends H { } // Class J also inherits from class H
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537530## 🔹 8. Compare _ Inheritance_ vs. _ Mixin_ vs. _ Composition_ .
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539532### Answer
@@ -567,7 +560,6 @@ Many modern OOP design guidelines, like the **composition over inheritance princ
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571563## 🔹 9. Can you inherit _ Private Members_ of a _ Class_ ?
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573565### Answer
@@ -578,7 +570,6 @@ In most OOP languages these members are **not accessible** outside their declari
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582573## 🔹 10. Can a _ Class_ inherit the _ Constructor_ of its _ Base Class_ ?
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584575### Answer
@@ -600,235 +591,235 @@ While traditionally **constructors are not inherited** by derived classes, some
600591- ** Kotlin** : Constructors aren't inherited, but derived classes need to invoke the base class constructor using the ` super ` keyword.
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606594## 🔹 11. How to prevent a _ Class_ to be _ Inherited_ further?
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608596### Answer
609597
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614602## 🔹 12. What is _ Encapsulation_ ?
615603
616604### Answer
617605
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622610## 🔹 13. What is _ Polymorphism_ ? Explain _ Overriding_ and _ Overloading_ .
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624612### Answer
625613
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630618## 🔹 14. Name some ways to _ Overload_ a _ Method_ .
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632620### Answer
633621
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638626## 🔹 15. What is an _ Abstraction_ ? Name some _ Abstraction Techniques_ .
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640628### Answer
641629
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646634## 🔹 16. What is an _ Abstract Class_ ?
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648636### Answer
649637
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654642## 🔹 17. What is an _ Interface_ ?
655643
656644### Answer
657645
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662650## 🔹 18. When to use _ Interface_ vs. _ Base Class_ ?
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664652### Answer
665653
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670658## 🔹 19. Why can't _ Static Methods_ in _ C#_ implement an _ Interface_ ?
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672660### Answer
673661
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678666## 🔹 20. Can a _ Non-static_ method be overridden as _ Static_ ?
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680668### Answer
681669
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686674## 🔹 21. Can you set _ Accessibility Modifiers_ for methods within an _ Interface_ ?
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688676### Answer
689677
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694682## 🔹 22. Explain the concepts of _ Constructor_ and _ Destructor_ .
695683
696684### Answer
697685
698- 👉🏼 Check out all 39 answers here: [ Devinterview.io - OOP] ( https://devinterview.io/dev /oop-interview-questions )
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702690## 🔹 23. What is a _ Static Constructor_ ?
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704692### Answer
705693
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710698## 🔹 24. Why might a _ Destructor_ in a _ C#_ class not execute?
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712700### Answer
713701
714- 👉🏼 Check out all 39 answers here: [ Devinterview.io - OOP] ( https://devinterview.io/dev /oop-interview-questions )
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718706## 🔹 25. What is the difference between a _ Class_ and a _ Structure_ ?
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720708### Answer
721709
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726714## 🔹 26. What is the difference between _ Virtual method_ and _ Abstract method_ ?
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728716### Answer
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734722## 🔹 27. What is the purpose of a _ Virtual keyword_ ?
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736724### Answer
737725
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726+ 👉🏼 Check out all 39 answers here: [ Devinterview.io - OOP] ( https://devinterview.io/data /oop-interview-questions )
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742730## 🔹 28. What is _ Cohesion_ in OOP?
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744732### Answer
745733
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750738## 🔹 29. What is _ Coupling_ in OOP?
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752740### Answer
753741
754- 👉🏼 Check out all 39 answers here: [ Devinterview.io - OOP] ( https://devinterview.io/dev /oop-interview-questions )
742+ 👉🏼 Check out all 39 answers here: [ Devinterview.io - OOP] ( https://devinterview.io/data /oop-interview-questions )
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758746## 🔹 30. What is the difference between _ Cohesion_ and _ Coupling_ ?
759747
760748### Answer
761749
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750+ 👉🏼 Check out all 39 answers here: [ Devinterview.io - OOP] ( https://devinterview.io/data /oop-interview-questions )
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766754## 🔹 31. How do _ Association_ , _ Aggregation_ , and _ Composition_ differ in OOP?
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768756### Answer
769757
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774762## 🔹 32. What is _ Liskov Substitution Principle_ (LSP)? Provide some examples of _ Violation_ and _ Adherence_ .
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776764### Answer
777765
778- 👉🏼 Check out all 39 answers here: [ Devinterview.io - OOP] ( https://devinterview.io/dev /oop-interview-questions )
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782770## 🔹 33. Whait is _ Repository Pattern_ ? Name some of it's benefits.
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784772### Answer
785773
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790778## 🔹 34. How _ Monads_ can be useful in _ OOP_ ?
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792780### Answer
793781
794- 👉🏼 Check out all 39 answers here: [ Devinterview.io - OOP] ( https://devinterview.io/dev /oop-interview-questions )
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798786## 🔹 35. What is a _ Unit Of Work_ ?
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800788### Answer
801789
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806794## 🔹 36. Does _ .NET_ support _ Multiple Inheritance_ ?
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808796### Answer
809797
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814802## 🔹 37. Why use _ Getters_ and _ Setters_ for simple operations instead of _ Public Fields_ ?
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816804### Answer
817805
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822810## 🔹 38. What is _ Circular Reference_ ? How to solve it?
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824812### Answer
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830818## 🔹 39. Is it possible to declare a _ Private Class_ within a _ Namespace_ ?
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832820### Answer
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