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AI solution for JavaScript Quiz on BFE.dev
32. Hoisting IIII

The code outputs:

function
number
number
string
number

Explanation:

  1. The variable a is declared with a value of 1, but then a function with the same name is also declared. In JavaScript, functions take precedence over variables with the same name, so typeof a returns "function".

  2. The variable b is declared, and then a function with the same name is also declared. However, the function is then assigned a value of 1. Therefore, typeof b returns "number".

  3. The variable c is declared as a function and then later assigned a value of 1. Therefore, typeof c returns "number".

  4. The variable d is declared with a value of 1. Then, a self-invoking anonymous function is defined that changes the value of d to '2' and also declares a function with the same name. However, since the function is defined within the scope of the anonymous function and d is changed to a string before the function is called, typeof d returns "string".

  5. The variable e is declared with a value of 1. Then, a constant function f is defined with the same name as the variable e. However, since f is a function expression and not a function declaration, it does not affect the scope of e. Therefore, typeof e returns "number".