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Basic OOPS Concepts MCQ

1. Which of the following statements is not correct with regard to Procedural Language?

Large programs are divided into functions

Data moves around openly from one function to another

Data is emphasized over procedure

It uses top-down program design approach

Answer

Correct Answer: Data is emphasized over procedure

Note: This Question is unanswered, help us to find answer for this one

2. Which of the following are object oriented programming language?

Eiffel

Java

Smalltalk

All of the above are object oriented programming language

Answer

Correct Answer: All of the above are object oriented programming language

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3. Which of the following is honored as the first Object Oriented Programming language having notion of objects, classes and inheritance in it?

Ada

Smalltalk

C++

Simula

Boo

Answer

Correct Answer: Simula

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4. In Public derivation using C++, which of the following are the ways to access base class members through derived class?

public --> protected

protected --> protected

public --> public

protected --> private

Answer

Correct Answer: protected --> protected

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5. Which of the following options are correct with regard to a static variable?

It can be initialized only once

It is privileged to get initialized first

Its value cannot be changed

It holds its value when accessed

Answer

Correct Answer: It is privileged to get initialized first

Note: This Question is unanswered, help us to find answer for this one

6. Which of the following statements is correct with regard to class based OOPS?

The concept of class is centered

It is the most popular technique of inheritance

It is better than object based model

All of the above

Answer

Correct Answer: All of the above

Note: This Question is unanswered, help us to find answer for this one

7. Which of the following is the starting point for program execution in C++?

User defined function

main function

First function defined in class

None of the above

Answer

Correct Answer: main function

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8. Inheritance is a process by which the objects of parent class acquire the properties of a child class.

True

False

Answer

Correct Answer: True

Note: This Question is unanswered, help us to find answer for this one

9. What is Abstraction?

An act of representing essential features without including details or working methodology

An act of representing essential features along with the details or working methodology

An act of acquiring properties of some other object

An ability to be present in more than one form

Answer

Correct Answer: An act of representing essential features without including details or working methodology

Note: This Question is unanswered, help us to find answer for this one

10. Which of the following cannot apply to constructors?

Name same as class name

Void return type

Can have parameters

Overloading

Answer

Correct Answer: Void return type

Note: This Question is unanswered, help us to find answer for this one

11. Which of the following describes the Function Overloading?

Same number of parameters, different parameter data type

Same types of parameters, different function name

Same function name, different order of parameters

Same name of parameters, different return type

Answer

Correct Answer: Same function name, different order of parameters

Note: This Question is unanswered, help us to find answer for this one

12. What is Encapsulation?

Wrapping functions into a single unit

Wrapping functions and data into a single unit

Making the whole data accessible to the outer world

Making the whole data and functions accessible to the outer world

Answer

Correct Answer: Wrapping functions and data into a single unit

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13. Which of the following statements correctly explains Operator Overloading?

An operator exhibits same behavior in different situations

An operator exhibits different behavior in different instances

An operator exhibits ambiguous behavior in different instances

An operator exhibits different behavior in same situations

Answer

Correct Answer: An operator exhibits ambiguous behavior in different instances

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14. Which of the following does not constitute the classes relationship?

is-a

part-of

has-a

has-parts

Answer

Correct Answer: has-parts

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15. Which of the following statements is not correct with regard to Operator Overloading?

It can be overloaded many times using distinct signatures

It can be called compile time polymorphism

It can be static or protected

It must have at least one user defined type

Answer

Correct Answer: It can be static or protected

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16. What is an Object in Object Oriented Programming?

A real entity having some state

A real entity having state and behavior

An entity having some state

An entity having state and behavior

Answer

Correct Answer: An entity having state and behavior

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17. The dynamic binding is the linking of a procedure call with the code to be executed at runtime.

True

False

Answer

Correct Answer: True

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18. Which of the following is a benefit derived from using OOPS?

Elimination of redundant code

Reusing the code

Ability to enhance and extend previously written code for new modules

Co-existence of multiple instances of objects

All of the above

Answer

Correct Answer: All of the above

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19. Which of the following help increase the code clarity?

Inheritance

Polymorphism

Abstraction

Encapsulation

Answer

Correct Answer: Abstraction

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20. Two functions are defined with the same name and same return type. The first one accepts string input parameter type and the second one accepts integer. This represents Abstraction.

True

False

Answer

Correct Answer: False

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21. Which of the following cannot be passed to a function?

Array

Class object

Reference variable

Header File

Answer

Correct Answer: Header File

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22. You have three classes named A, B, and C. The class B is derived from class A and class C is derived from B. Which of the following relations are correct for the given classes?

A is a B

B is a A

C is a B

B is a C

Answer

Correct Answer: B is a A

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23. What is Function Overriding?

Early binding

Late binding

Pre-Mature binding

None of the above

Answer

Correct Answer: Late binding

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24.
A shared/static method is associated with a Class.

True

False

Answer

Correct Answer: True

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25. What does the following classes (as shown in the given figure) represent?
A --> B --> C --> D

Multiple inheritance

Hybrid inheritance

Multi-level inheritance

Multi-class inheritance

Answer

Correct Answer: Multi-level inheritance

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26. Which of the following helps convert a Class into an Abstract?

Static keyword

Converting all member functions into 'const'

Converting a function into virtual

Converting a function into pure virtual

Answer

Correct Answer: Converting a function into pure virtual

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27. Which of the following statements are correct with regard to Polymorphism?

Polymorphism is a process by which a class can exist in multiple forms

Polymorphism is a process by which a class can exist in only two forms

Polymorphism is a process by which different instances of a class displays different behavior

Polymorphism is a process by which different instances of a class displays similar behavior

Answer

Correct Answer: Polymorphism is a process by which a class can exist in multiple forms

Note: This Question is unanswered, help us to find answer for this one

28. Which of the following types of Inheritance is not known?

Single

Multiple

Hierarchical

Ternary

Multilevel

Answer

Correct Answer: Ternary

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29. Object-based programming languages do not support Inheritance and dynamic binding.

True

False

Answer

Correct Answer: True

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30. Which of the following is not a procedural language?

FORTRAN

Small talk

Cobol

Answer

Correct Answer: Small talk

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31. Which of the following is not valid for an inline function?

It saves the overhead of calling function

It must contain only a few lines of code

It allows recursion

It should not contain static variables

Answer

Correct Answer: It allows recursion

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32. Which of the following is an "Intermediate Base Class" with regard to the given figure:
Class A --> Class B (Derived) --> Class C (Derived)

Class A

Class B

Class C

Class B and Class C

Answer

Correct Answer: Class B

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33. In Java, how many times can classes be nested within a class?

Any number of times

Answer

Correct Answer: Any number of times

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34. Function Overloading is based upon the number and/or type of arguments passed.

True

False

Answer

Correct Answer: True

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35. How much memory does a function use up within an object?

2 bytes

8 bytes

16 bytes

0 byte

Answer

Correct Answer: 0 byte

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36. Is it possible to call a main() inside another main() function in C++?

Yes

Answer

Correct Answer: Yes

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37. Which of the following statements are correct?

A class is an instance factory

A class is a template for creating an entity

A class is a set of all the instances of a pattern

None of the above

Answer

Correct Answer: A class is an instance factory

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38. What does Data Hiding refer to?

Insulating data from being accessed by the program

Insulating data from being accessed by the program directly

Insulating data from being accessed by the members directly

None of the above

Answer

Correct Answer: Insulating data from being accessed by the program directly

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39. Which of the following is not correct with regard to a virtual function in C++?

It can be a friend of any other class

It implements early binding

Prototype of function in base and derived class must be identical

It implements polymorphism

Answer

Correct Answer: It implements early binding

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40. Which of the following statements are correct with regard to Prototype based programming?

It is a means of achieving object-oriented behavior sharing.

In Prototyping, a similar object can be defined by referring to the original one as a template and then listing how the new object differs from the original one.

JavaScript is a common example of prototyping model.

None of the above

Answer

Correct Answer: It is a means of achieving object-oriented behavior sharing.

Note: This Question is unanswered, help us to find answer for this one

41. Why is composition considered a simpler method than inheritance?

Composition has complex namespace clashes.

It isn't considered a simpler method.

Composition lacks the namespace clash, and the complicated inheritance hierarchies.

It is filled with complicated inheritance hierarchies.

Answer

Correct Answer: Composition lacks the namespace clash, and the complicated inheritance hierarchies.

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42. What is the difference between interfaces and abstract classes?

interfaces cannot have properties whereas abstract classes can

interfaces can provide default implementation whereas abstract classes cannot provide implementations

abstract classes can provide default implementation whereas interfaces cannot provide implementations

interfaces cannot have methods whereas abstract classes can

Answer

Correct Answer: abstract classes can provide default implementation whereas interfaces cannot provide implementations

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43. What plays a critical role in testing for syntactic legality?

Syntactic congruency.

Logical assumptions.

Mathematical truths.

Termination proofs.

Answer

Correct Answer: Termination proofs.

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44. True or false? Private variables are visible outside of the class.

only to subclasses

True

only through methods

False

Answer

Correct Answer: only through methods

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45. If a system is systematically computing “metadata”, what would you use to define that system?

Programming metadata.

Accentuated grammars.

Attribute phonetics.

Attribute grammars.

Answer

Correct Answer: Attribute grammars.

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46. What class and extension best demonstrate a HAS-A Relationship?

Feline, Canine

Canine, Mammal

Feline, Animal

Feline, Lion

Answer

Correct Answer: Feline, Lion

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47. Virtual inheritance is:

where virtually nothing is inherited

the base class is replicated for each derived class

not an OOP term

where only one base class object is created

Answer

Correct Answer: where only one base class object is created

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48. Programming languages supporting the OOPS paradigm are typically contained within what two classes?

OOPS-based and object-based

System based and program-based.

Logic-based and inference-based.

Prototype-based, or class-based.

Answer

Correct Answer: Prototype-based, or class-based.

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49. A clone method is needed to:

make any copies of this object

to create a second copy of all contained subobjects

make any copies of the parent object

make any copies of children objects

Answer

Correct Answer: to create a second copy of all contained subobjects

Note: This Question is unanswered, help us to find answer for this one

50. What are classes used for?

Classes describe different features.

Classes are used to manage metadata.

Classes are used to define specific types.

Classes define objects.

Answer

Correct Answer: Classes are used to define specific types.

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51. When two methods have the same name, what are they considered, and what kind of binding do they have?

Overhauled, static.

Overloaded, static.

Overloaded, late.

Overloaded, dynamic.

Answer

Correct Answer: Overloaded, static.

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52. Semantically, what has happened if the result rendered is non-computational?

A program corruption.

Syntactically legal strings have occurred.

Syntactically illegal strings have occurred.

A system failure.

Answer

Correct Answer: Syntactically illegal strings have occurred.

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53. True or false? Static variables are visible outside of the class

True

False

depends

Answer

Correct Answer: depends

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54. An abstract class can:

Only contain abstract methods

Be subclassed

Be instantiated

Answer

Correct Answer: Be subclassed

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55. True or false? Abstract methods are only defined in the parent.

True

False

Answer

Correct Answer: False

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56. What is the most important trait of a polymorphism?

The difference in interface.

The total differences.

The common interface.

The multiple interfaces.

Answer

Correct Answer: The common interface.

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57. When a variable is defined within a class, what is it considered?

A class variable.

A varying variable.

An early variable.

An instance variable.

Answer

Correct Answer: An instance variable.

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58. A mutator method is also known as a:

updater

getter

setter

deleter

Answer

Correct Answer: setter

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59. Which of the following is included in the field of formal semantics?

The definition of semantic models.

The understanding of programming models.

The comprehension of relational models.

The definition of logistic models.

Answer

Correct Answer: The definition of semantic models.

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60. Lambda functions are allowed in class definitions

False

True

Answer

Correct Answer: False

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61. Which of the following could be considered a polymorphism?

The class, “clsCalculation” with two functions, both named “Add”.

Two classes named “clsCalculation” with the single function, “add”.

Two functions named “clsCalculation”.

Two classes named “add”.

Answer

Correct Answer: The class, “clsCalculation” with two functions, both named “Add”.

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62. True or false? A class can implement one or more interfaces.

False

True

Answer

Correct Answer: True

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63. What is a simple way to think of inheritance?

New properties written from scratch.

One object generating another object.

One object writing new properties for another.

One object acquiring the properties of another.

Answer

Correct Answer: One object acquiring the properties of another.

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64. Which of the following classes allows only one object of it to be created?

Singleton class

Abstract class

Friend class

Virtual class

Answer

Correct Answer: Singleton class

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65. If a user were to observe Java code from the outside world, what would they be able to access?

The public methods.

All of the code in the program.

The Java console.

The private methods.

Answer

Correct Answer: The public methods.

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66. True or false? Using traits gives single inheritance languages most of the power of multiple inheritance.

True

False

Answer

Correct Answer: True

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67. True or false? An interface is another name for a class.

True

False

Answer

Correct Answer: False

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68. Ref counts are:

magic methods on all classes

how wrestling referees determine a winner

an optimization for compilers

a way of managing object lifetimes

Answer

Correct Answer: a way of managing object lifetimes

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69. What is a primary motivation for using OOP?

To increase reusability and maintainability of code.

To increase speed of writing code.

To increase data coupling.

Because other programming paradigms have become obsolete.

Answer

Correct Answer: To increase reusability and maintainability of code.

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Basic OOPS Concepts MCQ

1. Which of the following statements is not correct with regard to Procedural Language?

2. Which of the following are object oriented programming language?

3. Which of the following is honored as the first Object Oriented Programming language having notion of objects, classes and inheritance in it?

4. In Public derivation using C++, which of the following are the ways to access base class members through derived class?

5. Which of the following options are correct with regard to a static variable?

6. Which of the following statements is correct with regard to class based OOPS?

7. Which of the following is the starting point for program execution in C++?

8. Inheritance is a process by which the objects of parent class acquire the properties of a child class.

9. What is Abstraction?

10. Which of the following cannot apply to constructors?

11. Which of the following describes the Function Overloading?

12. What is Encapsulation?

13. Which of the following statements correctly explains Operator Overloading?

14. Which of the following does not constitute the classes relationship?

15. Which of the following statements is not correct with regard to Operator Overloading?

16. What is an Object in Object Oriented Programming?

17. The dynamic binding is the linking of a procedure call with the code to be executed at runtime.

18. Which of the following is a benefit derived from using OOPS?

19. Which of the following help increase the code clarity?

20. Two functions are defined with the same name and same return type. The first one accepts string input parameter type and the second one accepts integer. This represents Abstraction.

21. Which of the following cannot be passed to a function?

22. You have three classes named A, B, and C. The class B is derived from class A and class C is derived from B. Which of the following relations are correct for the given classes?

23. What is Function Overriding?

24. A shared/static method is associated with a Class.

25. What does the following classes (as shown in the given figure) represent?A --> B --> C --> D

26. Which of the following helps convert a Class into an Abstract?

27. Which of the following statements are correct with regard to Polymorphism?

28. Which of the following types of Inheritance is not known?

29. Object-based programming languages do not support Inheritance and dynamic binding.

30. Which of the following is not a procedural language?

31. Which of the following is not valid for an inline function?

32. Which of the following is an "Intermediate Base Class" with regard to the given figure:Class A --> Class B (Derived) --> Class C (Derived)

33. In Java, how many times can classes be nested within a class?

34. Function Overloading is based upon the number and/or type of arguments passed.

35. How much memory does a function use up within an object?

36. Is it possible to call a main() inside another main() function in C++?

37. Which of the following statements are correct?

38. What does Data Hiding refer to?

39. Which of the following is not correct with regard to a virtual function in C++?

40. Which of the following statements are correct with regard to Prototype based programming?

41. Why is composition considered a simpler method than inheritance?

42. What is the difference between interfaces and abstract classes?

43. What plays a critical role in testing for syntactic legality?

44. True or false? Private variables are visible outside of the class.

45. If a system is systematically computing “metadata”, what would you use to define that system?

46. What class and extension best demonstrate a HAS-A Relationship?

47. Virtual inheritance is:

48. Programming languages supporting the OOPS paradigm are typically contained within what two classes?

49. A clone method is needed to:

50. What are classes used for?

51. When two methods have the same name, what are they considered, and what kind of binding do they have?

52. Semantically, what has happened if the result rendered is non-computational?

53. True or false? Static variables are visible outside of the class

54. An abstract class can:

55. True or false? Abstract methods are only defined in the parent.

56. What is the most important trait of a polymorphism?

57. When a variable is defined within a class, what is it considered?

58. A mutator method is also known as a:

59. Which of the following is included in the field of formal semantics?

60. Lambda functions are allowed in class definitions

61. Which of the following could be considered a polymorphism?

62. True or false? A class can implement one or more interfaces.

63. What is a simple way to think of inheritance?

64. Which of the following classes allows only one object of it to be created?

65. If a user were to observe Java code from the outside world, what would they be able to access?

66. True or false? Using traits gives single inheritance languages most of the power of multiple inheritance.

67. True or false? An interface is another name for a class.

68. Ref counts are:

69. What is a primary motivation for using OOP?

24.
A shared/static method is associated with a Class.

25. What does the following classes (as shown in the given figure) represent?
A --> B --> C --> D

32. Which of the following is an "Intermediate Base Class" with regard to the given figure:
Class A --> Class B (Derived) --> Class C (Derived)