The derived class inherits
all members and member functions of a base class
. The derived class can have more functionality with respect to the Base class and can easily access the Base class. A Derived class is also called a child class or subclass.
What can be inherited by a derived class from a base class Mcq?
Explanation: A class inheriting a base class defines
single level inheritance
. Inheriting an already derived class makes it multilevel inheritance. And if base class is inherited by 2 other classes, it is multiple inheritance.
Which of the following can derived class inherit?
Which of the following can derived class inherit? Explanation:
Both data members and member functions are inherited
by derived class in C++.
Are derived class does not inherit from the base class?
When you define a class to derive from another class, the derived class implicitly gains all the members of the base class, except for its
constructors and finalizers
. … These members include a constructor, because constructors aren't inherited.
Which of the following are derived from the base class?
2. Which among the following is inherited by a derived class from base class? Explanation: The
class inheriting another class
, inherits all the data members and member functions that are not private. This is done to ensure the security features with maximum flexibility.
How many classes can be derived from the base class using hierarchical inheritance?
4. How many classes must be there to implement hierarchical inheritance? Explanation:
At least 3 classes must be
there. Two derived classes and one base class.
Which members can be accessed in derived class from the base class?
A derived class can access
all the non-private members of its base class
. Thus base-class members that should not be accessible to the member functions of derived classes should be declared private in the base class. Constructors, destructors and copy constructors of the base class.
When a derived class has two or more base classes?
If a class is derived from two or more base classes then it is called
multiple inheritance
.
What does derived class does not inherit?
Following are the properties which a derived class doesn't inherit from its parent class : 1) The base class's constructors and destructor. 2) The base class's friend functions. 3)
Overloaded operators of the base class.
Can we inherit child class from 2 base classes?
In
Multiple inheritance
, one class can have more than one superclass and inherit features from all its parent classes. As shown in the below diagram, class C inherits the features of class A and B. But C# does not support multiple class inheritance.
What happens when a derived class inherits a base class privately?
Answer: With private inheritance,
public and protected member of the base class become private members of the derived class
. That means the methods of the base class do not become the public interface of the derived object. However, they can be used inside the member functions of the derived class.
What happens if the base and derived class?
What happens if the base and derived class contains definition of a function with same prototype? Compiler reports an error on compilation.
Only base class function will get called irrespective of object
. … Base class object will call base class function and derived class object will call derived class function.
Is used to design the base class?
Which class is used to design the base class? Explanation:
Abstract class
is used to design base class because functions of abstract class can be overridden in derived class hence derived class from same base class can have common method with different implementation, hence forcing encapsulation.
Which class destructor is invoked first if class B is derived from class A?
Constructor and Destructor Execution in Inheritance:
When a derived object is destroyed,
its destructor
is called first, followed by the base class' destructor, if it exists (i.e. constructor functions are executed in their order of derivation. Destructor functions are executed in reverse order of derivation).
When two or more classes inherit a single class it is known as?
When two or more classes inherits a single class, it is known as
hierarchical inheritance
. In the example given below, Dog and Cat classes inherits the Animal class, so there is hierarchical inheritance.
Is it compulsory for all the classes in multilevel inheritance?
All the classes must have all the members declared private to implement multilevel inheritance
. Explanation: There is no mandatory rule to make the members private for multilevel inheritance. Moreover, if all the classes have only the private members then there won't be any member to get inherited.
