AI solution for JavaScript Quiz on BFE.dev
38. Hoisting IV

The code will output "undefined" for func1() and will throw a "ReferenceError" for func2() because the variable foo is not defined before it is used in the function block due to the use of let. This is due to the variable being block scoped in func2(). In func1(), the variable foo is declared with the keyword var, which is function scoped, but it is hoisted to the top of the function block, so its value is undefined when it is logged before its assignment.