When a child class inherits from only one parent class, it is called?

When a child class inherits from only one parent class, it is called Single Inheritance.

Here are the steps to explain this concept:

Step 1: Inheritance is a fundamental concept in Object-Oriented Programming (OOP) where one class acquires the properties (like methods and fields) of another class.

Step 2: The class which inherits the properties of another class is known as a Child Class, Sub Class, or Derived Class.

Step 3: The class whose properties are inherited is known as a Parent Class, Super Class, or Base Class.

Step 4: When a child class inherits from only one parent class, it is known as Single Inheritance.

Step 5: This is the simplest form of inheritance in OOP. It allows a derived class to inherit the properties and behavior of a single parent class. This enables code reusability and also allows the child class to add its own methods and fields.