Question 1

What is C3 linearization in Solidity?

Accepted Answer

C3 linearization is an algorithm that computes a deterministic method resolution order (MRO) for contracts with multiple inheritance. It ensures each parent contract appears exactly once in a consistent order, resolving ambiguities like the diamond problem.

Question 2

How does Solidity handle the diamond inheritance problem?

Accepted Answer

Solidity uses C3 linearization to create a single, unambiguous order for function lookup. When two parent contracts inherit from the same base, the algorithm ensures the base appears only once in the MRO. The child must explicitly override conflicting functions.

Question 3

In what order do constructors execute in Solidity inheritance?

Accepted Answer

Constructors execute in the reverse of the C3 linearization order — from the most base contract to the most derived. This ensures all parent state is properly initialized before child constructor logic runs.

Inheritance Visualizer