Final answer:
An abstract parent class can have non-abstract children in object-oriented programming.
Step-by-step explanation:
Yes, an abstract parent class can have non-abstract children. In object-oriented programming, an abstract class is one that cannot be instantiated and is typically used as a blueprint for other classes to inherit from. The child classes can be non-abstract and provide concrete implementations of the abstract methods defined in the parent class.
For example, let's say we have an abstract class called 'Shape' with an abstract method called 'calculateArea()'. We can then have non-abstract classes like 'Rectangle' and 'Circle' that extend the 'Shape' class and provide their own implementations of the 'calculateArea()' method.