1. What is object-oriented programming ? Junior A. the ability of one interface or name to take many forms depending on the object or arguments B. a field whose own copy belongs to each object created from a class C. the guideline 'do not repeat yourself', avoiding duplicated logic by factoring it into one place D. a paradigm organizing software around objects that bundle data and the behavior acting on it
2. Which term means: "a paradigm organizing software around objects that bundle data and the behavior acting on it"? Junior A. instance variable B. inheritance C. object-oriented programming D. message passing
3. Which statement is correct? Junior A. object-oriented programming — the ability of one interface or name to take many forms depending on the object or arguments B. object-oriented programming — bundling data and methods in one unit and restricting direct external access to the internal state C. object-oriented programming — a class is the abstract template, while an object is a concrete instance occupying memory at runtime D. object-oriented programming — a paradigm organizing software around objects that bundle data and the behavior acting on it
4. What is class ? Junior A. the ability of one interface or name to take many forms depending on the object or arguments B. a paradigm organizing software around objects that bundle data and the behavior acting on it C. a blueprint defining the attributes and methods that its objects will have D. a class is the abstract template, while an object is a concrete instance occupying memory at runtime
5. Which term means: "a blueprint defining the attributes and methods that its objects will have"? Junior A. polymorphism B. message passing C. object-oriented programming D. class
6. Which statement is correct? Junior A. class — the ability of one interface or name to take many forms depending on the object or arguments B. class — a blueprint defining the attributes and methods that its objects will have C. class — abstraction hides complexity at the design level, while encapsulation hides data by bundling and access control D. class — bundling data and methods in one unit and restricting direct external access to the internal state
7. What is object ? Junior A. a blueprint defining the attributes and methods that its objects will have B. exposing only essential features of an entity while hiding its complex implementation details C. a concrete instance of a class holding its own state in memory D. bundling data and methods in one unit and restricting direct external access to the internal state
8. Which term means: "a concrete instance of a class holding its own state in memory"? Junior A. abstraction B. DRY principle C. object D. abstraction vs encapsulation
9. Which statement is correct? Junior A. object — a field whose own copy belongs to each object created from a class B. object — a paradigm organizing software around objects that bundle data and the behavior acting on it C. object — a class is the abstract template, while an object is a concrete instance occupying memory at runtime D. object — a concrete instance of a class holding its own state in memory
10. What is encapsulation ? Junior A. bundling data and methods in one unit and restricting direct external access to the internal state B. objects interacting by invoking each other's methods rather than accessing fields directly C. a paradigm organizing software around objects that bundle data and the behavior acting on it D. a mechanism where a derived class acquires the attributes and behavior of a base class
11. Which term means: "bundling data and methods in one unit and restricting direct external access to the internal state"? Junior A. encapsulation B. inheritance C. DRY principle D. message passing
12. Which statement is correct? Junior A. encapsulation — exposing only essential features of an entity while hiding its complex implementation details B. encapsulation — the guideline 'do not repeat yourself', avoiding duplicated logic by factoring it into one place C. encapsulation — a concrete instance of a class holding its own state in memory D. encapsulation — bundling data and methods in one unit and restricting direct external access to the internal state
13. What is abstraction ? Junior A. exposing only essential features of an entity while hiding its complex implementation details B. a paradigm organizing software around objects that bundle data and the behavior acting on it C. the ability of one interface or name to take many forms depending on the object or arguments D. bundling data and methods in one unit and restricting direct external access to the internal state
14. Which term means: "exposing only essential features of an entity while hiding its complex implementation details"? Junior A. polymorphism B. class vs object C. abstraction D. instance variable
15. Which statement is correct? Junior A. abstraction — exposing only essential features of an entity while hiding its complex implementation details B. abstraction — a concrete instance of a class holding its own state in memory C. abstraction — a mechanism where a derived class acquires the attributes and behavior of a base class D. abstraction — bundling data and methods in one unit and restricting direct external access to the internal state
16. What is inheritance ? Junior A. a mechanism where a derived class acquires the attributes and behavior of a base class B. a blueprint defining the attributes and methods that its objects will have C. a concrete instance of a class holding its own state in memory D. the guideline 'do not repeat yourself', avoiding duplicated logic by factoring it into one place
17. Which term means: "a mechanism where a derived class acquires the attributes and behavior of a base class"? Junior A. instance variable B. message passing C. DRY principle D. inheritance
18. Which statement is correct? Junior A. inheritance — exposing only essential features of an entity while hiding its complex implementation details B. inheritance — a mechanism where a derived class acquires the attributes and behavior of a base class C. inheritance — bundling data and methods in one unit and restricting direct external access to the internal state D. inheritance — a concrete instance of a class holding its own state in memory
19. What is polymorphism ? Junior A. the guideline 'do not repeat yourself', avoiding duplicated logic by factoring it into one place B. the ability of one interface or name to take many forms depending on the object or arguments C. abstraction hides complexity at the design level, while encapsulation hides data by bundling and access control D. a field whose own copy belongs to each object created from a class
20. Which term means: "the ability of one interface or name to take many forms depending on the object or arguments"? Junior A. instance variable B. DRY principle C. abstraction D. polymorphism
21. Which statement is correct? Junior A. polymorphism — bundling data and methods in one unit and restricting direct external access to the internal state B. polymorphism — the ability of one interface or name to take many forms depending on the object or arguments C. polymorphism — a blueprint defining the attributes and methods that its objects will have D. polymorphism — a field whose own copy belongs to each object created from a class
22. What is abstraction vs encapsulation ? Mid A. a paradigm organizing software around objects that bundle data and the behavior acting on it B. a class is the abstract template, while an object is a concrete instance occupying memory at runtime C. objects interacting by invoking each other's methods rather than accessing fields directly D. abstraction hides complexity at the design level, while encapsulation hides data by bundling and access control
23. Which term means: "abstraction hides complexity at the design level, while encapsulation hides data by bundling and access control"? Mid A. object B. abstraction vs encapsulation C. class vs object D. class
24. Which statement is correct? Mid A. abstraction vs encapsulation — abstraction hides complexity at the design level, while encapsulation hides data by bundling and access control B. abstraction vs encapsulation — objects interacting by invoking each other's methods rather than accessing fields directly C. abstraction vs encapsulation — a mechanism where a derived class acquires the attributes and behavior of a base class D. abstraction vs encapsulation — the ability of one interface or name to take many forms depending on the object or arguments
25. What is class vs object ? Mid A. the ability of one interface or name to take many forms depending on the object or arguments B. a class is the abstract template, while an object is a concrete instance occupying memory at runtime C. a paradigm organizing software around objects that bundle data and the behavior acting on it D. a mechanism where a derived class acquires the attributes and behavior of a base class
26. Which term means: "a class is the abstract template, while an object is a concrete instance occupying memory at runtime"? Mid A. abstraction B. class vs object C. object-oriented programming D. inheritance
27. Which statement is correct? Mid A. class vs object — a field whose own copy belongs to each object created from a class B. class vs object — the guideline 'do not repeat yourself', avoiding duplicated logic by factoring it into one place C. class vs object — the ability of one interface or name to take many forms depending on the object or arguments D. class vs object — a class is the abstract template, while an object is a concrete instance occupying memory at runtime
28. What is message passing ? Mid A. a blueprint defining the attributes and methods that its objects will have B. the guideline 'do not repeat yourself', avoiding duplicated logic by factoring it into one place C. a mechanism where a derived class acquires the attributes and behavior of a base class D. objects interacting by invoking each other's methods rather than accessing fields directly
29. Which term means: "objects interacting by invoking each other's methods rather than accessing fields directly"? Mid A. class vs object B. class C. message passing D. object
30. Which statement is correct? Mid A. message passing — the ability of one interface or name to take many forms depending on the object or arguments B. message passing — a paradigm organizing software around objects that bundle data and the behavior acting on it C. message passing — objects interacting by invoking each other's methods rather than accessing fields directly D. message passing — exposing only essential features of an entity while hiding its complex implementation details Showing 30 of 36 OOP · Principles questions — the full set, with answers, explanations and an AI tutor on every question, is inside.