AI solution for JavaScript Quiz on BFE.dev
27. Hoisting I

The code will output the following:

1
undefined
undefined
Uncaught ReferenceError: Cannot access 'd' before initialization

Explanation:

• The value of a (which is 1) will be outputted by the first console.log().
• The variable b has not been assigned a value yet so its value is undefined. Hence, the second console.log() will output undefined.
• The third console.log() will output undefined as well because c is declared with var which is hoisted to the top of its scope but has not been assigned a value yet.
• When d is declared with let, it is not hoisted to the top of the scope like var does. Therefore, the fourth console.log() will throw an error because d is accessed before it is initialized.