Encapsulation MCQ

Test your knowledge with important Encapsulation MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Encapsulation MCQs at Bissoy

• Which of the following is false about protected class members?
  ক

  They begin with one underscore

  খ

  They can be accessed by subclasses

  গ

  They can be accessed by name mangling method

  ঘ

  They can be accessed within a class
• The purpose of name mangling is to avoid unintentional access of private class members.
  ক

  True

  খ

  False
• Private members of a class cannot be accessed.
  ক

  True

  খ

  False
• Methods of a class that provide access to private members of the class are called as ______ and ______
  ক

  getters/setters

  খ

  __repr__/__str__

  গ

  user-defined functions/in-built functions

  ঘ

  __init__/__del__
• Which of the following is the most suitable definition for encapsulation?
  ক

  Ability of a class to derive members of another class as a part of its own definition

  খ

  Means of bundling instance variables and methods in order to restrict access to certain class members

  গ

  Focuses on variables and passing of variables to functions

  ঘ

  Allows for implementation of elegant software that is well designed and easily modified
• Which of these is not a fundamental features of OOP?
  ক

  Encapsulation

  খ

  Inheritance

  গ

  Instantiation

  ঘ

  Polymorphism
• Using encapsulation data security is ___________
  ক

  Not ensured

  খ

  Ensured to some extent

  গ

  Purely ensured

  ঘ

  Very low
• Encapsulation is the way to add functions in a user defined structure.
  ক

  True

  খ

  False
• Which among the following can be a concept against encapsulation rules?
  ক

  Using function pointers

  খ

  Using char* string pointer to be passed to non-member function

  গ

  Using object array

  ঘ

  Using any kind of pointer/array address in passing to another function
• Which among the following would destroy the encapsulation mechanism if it was allowed in programming?
  ক

  Using access declaration for private members of base class

  খ

  Using access declaration for public members of base class

  গ

  Using access declaration for local variable of main() function

  ঘ

  Using access declaration for global variables
• Which among the following violates the principle of encapsulation almost always?
  ক

  Local variables

  খ

  Global variables

  গ

  Public variables

  ঘ

  Array variables
• How can Encapsulation be achieved?
  ক

  Using Access Specifiers

  খ

  Using only private members

  গ

  Using inheritance

  ঘ

  Using Abstraction
• Which among the following should be encapsulated?
  ক

  The data which is prone to change is near future

  খ

  The data prone to change in long terms

  গ

  The data which is intended to be changed

  ঘ

  The data which belongs to some other class
• Encapsulation helps in writing ___________ classes in java.
  ক

  Mutable

  খ

  Abstract

  গ

  Wrapper

  ঘ

  Immutable
• While using encapsulation, which among the following is possible?
  ক

  Code modification can be additional overhead

  খ

  Data member’s data type can be changed without changing any other code

  গ

  Data member’s type can’t be changed, or whole code have to be changed

  ঘ

  Member functions can be used to change the data type of data members
• Which among the following best describes encapsulation?
  ক

  It is a way of combining various data members into a single unit

  খ

  It is a way of combining various member functions into a single unit

  গ

  It is a way of combining various data members and member functions into a single unit which can operate on any data

  ঘ

  It is a way of combining various data members and member functions that operate on those data members into a single unit