Question

When a method in an instance is called, how does C# find the correct method within the class hierarchy?

a It searches first in Object and then works down to the class of the instance.
b It searches first in the class of the instance, and then works up to Object.
c It searches first at the bottom of the hierarchy (the subclasses) and works its way up to the top (Object).
d It searches first at the top of the hierarchy (Object) and works its way down to the bottom (the subclasses).

Answer 1

C# finds the correct method within the class hierarchy by searching from the class of the instance up to Object.

Step-by-step explanation:

When a method in an instance is called, C# finds the correct method within the class hierarchy by searching first in the class of the instance, and then works up to Object.

This is known as inheritance, where a subclass inherits properties and methods from its superclass. When a method is called on an object, C# checks if the method is defined in the class of that object.

If it is not found, it continues searching in the superclass, and continues up the hierarchy until the method is found or until it reaches the topmost superclass, which is Object.

For example, let's say we have a class hierarchy where class B inherits from class A, and class A inherits from Object. If a method is called on an instance of class B, C# will first check if the method is present in class B. If it is not found, it will then check in class A. If it is still not found, it will check in Object.