Chapter 15: Problem 20

When both a base class and a derived class have constructors, the base class's constructor is called _______ (first/last).

Short Answer

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Question: In object-oriented programming, when an object of a derived class is instantiated, the constructor of the base class is called ________. Answer: first

Step by step solution

Understand Inheritance in Object-Oriented Programming

Inheritance is a key concept in object-oriented programming, allowing you to create a new class, called the derived class, that inherits properties and methods from an existing class, called the base class. When an object of the derived class is instantiated, it becomes necessary to call the constructors of both the base and derived classes to ensure proper object initialization.

Constructor Calling Sequence

Whenever an object of the derived class is created, the constructors are called in a specific sequence. If both the base class and the derived class have constructors, it is essential to know which constructor is called first to ensure proper initialization of the object.

Identify the Order of Constructor Calls

In object-oriented programming, when an object of the derived class is created, the base class's constructor is called first, followed by the constructor of the derived class. This ensures that the base class properties are initialized before any additional properties or methods specific to the derived class are initialized.

Answering the Exercise

According to the steps discussed above, when both a base class and a derived class have constructors, the base class's constructor is called first. Therefore, the blank in the exercise should be filled with the word "first".

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When both a base class and a derived class have constructors, the base class's constructor is called _______ (first/last).

Short Answer

Step by step solution

Understand Inheritance in Object-Oriented Programming

Constructor Calling Sequence

Identify the Order of Constructor Calls

Answering the Exercise

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