Hiding complexity, showing only essential parts

Abstraction and Interfaces

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Question 1

How do pure virtual functions help achieve abstraction in C++?

A
Do not help in any way
B
Allow the class to show only the interface, not the implementation
C
Help in combining data and functions together
D
Abstraction is not applicable to classes

Question 2

.Which of the following best describes the concept of abstraction in object-oriented programming?

A

Restricting access to certain class members from outside the class
B

Representing essential features without including background details
C

Combining data and methods into a single unit
D

Allowing multiple classes to inherit from a single superclass

Question 3

What is the primary purpose of abstraction in OOP?

A
Treating objects of different classes uniformly
B
Simplifying complex systems by focusing on essential characteristics
C
Defining attributes and behaviors of objects
D
Protecting data using access modifiers

Question 4

Which of the following is NOT true about interfaces?

A
Can contain default methods
B
Can contain constructors
C
Can be implemented by multiple classes
D
Can contain static methods

Question 5

Which of the following best describes abstraction?

A
Hiding implementation details and showing only relevant information to the users.
B
Binding both data members and member functions into a single unit.
C
Accessing data members and member functions of one class by other
D
All of the above

Question 6

What would be the output of the following code snippet?

#include
Using namespace std;

class implementAbstraction{
private:
   int a,b;
   void set(int x,int y)
   {
        a=x;
        b=y;
    }
    void display()
    {
       cout<<”a=”<<a<<endl;
       cout<<”b=”<<b<<endl;
    }
  };
  int main()
  { 
    implementAbstraction obj;
    obj.set(10,20);
    obj.display();
    return 0;
   }

A
a = 10, b = 20
B
a = 20, b = 10
C
Compilation Error
D
Runtime Error

Question 7

Which of the following best supports abstraction in C++?

A
Pointers
B
Access specifiers and pure virtual functions
C
Constructors
D
Inheritance

Question 8

Which access specifier is commonly used to hide data in abstraction?

A
Public
B
Private
C
Protected
D
Any of these

Question 9

What is the major difference in abstraction and encapsulation?

A
Abstraction hides implementation encapsulation binds data and function together.
B
Abstraction uses private members and encapsulation uses public members.
C
Encapsulation hides logic and abstraction binds data.
D
There is no difference

Question 10

What is Abstraction?

A
Hiding complexity, showing only essential parts
B
Creating multiple objects
C
Inheriting properties
D
Encapsulating data

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C++

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