Ethereum-Solidity Quiz Q1: What is fuzzing?

Fuzzing is an automated testing technique for smart contracts that generates a pre-set number of randomized/unexpected inputs that are thrown to the system with the end goal of exposing security vulnerabilities by triggering unexpected/invalid behavior.

Two types of fuzzing:

1. Stateless fuzzing:

   • state resets between function calls
   • a single function takes randomized input params
   • used for individual functions

2. Stateful fuzzing

   • state is maintained across multiple function calls
   • multiple random function calls with randomized input params
   • used for invariant testing