Inheritance and Object Methods Summary

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Questions and Answers

Which concept ensures that the base class's integrity is maintained in object-oriented programming?

  • Inheritance (correct)
  • Polymorphism
  • Encapsulation
  • Abstraction

In object-oriented programming, which class do all classes inherit from directly or indirectly?

  • Object (correct)
  • Root
  • Main
  • Base

Which concept allows a class to acquire methods from another class either directly or through a chain of inheritance?

  • Inheritance (correct)
  • Aggregation
  • Composition
  • Overloading

In the context of object-oriented programming, what is the purpose of Figure-12 mentioned in the text?

<p>Summarizing methods inherited by all classes (A)</p> Signup and view all the answers

What type of relationship is established between two classes when one class inherits from another?

<p>Parent-Child (A)</p> Signup and view all the answers

What is the main benefit of using inheritance in object-oriented programming?

<p>Promotes software reusability (C)</p> Signup and view all the answers

Which access modifier is typically used to give derived classes access to base-class members?

<p>Protected (C)</p> Signup and view all the answers

What is the purpose of using 'base' in derived classes in C#?

<p>To access base-class members (B)</p> Signup and view all the answers

Which relationship does inheritance represent in object-oriented programming?

<p>Is-a relationship (B)</p> Signup and view all the answers

In object-oriented programming, what does a derived class do in relation to a base class?

<p>Add its own fields and methods to specialize (D)</p> Signup and view all the answers

How are objects treated in relation to their inheritance hierarchy?

<p>Derived-class objects are treated as objects of their base class (B)</p> Signup and view all the answers

Which keyword declares that a derived-class method overrides a virtual or abstract base-class method?

<p>override (C)</p> Signup and view all the answers

What happens when a method is overridden with a more restrictive access modifier?

<p>It breaks the is-a relationship (B)</p> Signup and view all the answers

Which class represents an employee that receives a base salary in addition to a commission?

<p>BasePlusCommissionEmployee (D)</p> Signup and view all the answers

What can copying and pasting code from one class to another lead to?

<p>Errors and duplicated code (A)</p> Signup and view all the answers

Why must a derived-class constructor call its base-class constructor?

<p>To ensure proper initialization of inherited instance variables (D)</p> Signup and view all the answers

What does the virtual keyword allow in a base-class method?

<p>Enables overriding in derived classes (A)</p> Signup and view all the answers

Inheritance enables a derived class to access which type of members of its base class?

<p>Protected members via public properties (C)</p> Signup and view all the answers

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