Quiz for writing more idiomatic JS code

JSIdiomsQuiz.js

// 1. how would you refactor this function signature? what is problematic about it?
const someFunc = (A, B, C, D = 3, E, F, G = 'default') => { ... }

// 2. see below
myString = "Some string."
b = myString[myString.length - 1] // -> b = myString.slice(-1)