Salesforce JavaScript Developer Practice Exam

What will the output of console.log when the let declaration is re-assigned?

1. The current value of the variable

2. Undefined

3. ReferenceError

4. The last assigned value only

The correct answer is: The current value of the variable

The correct interpretation of what happens when a variable declared with `let` is reassigned in JavaScript is that the output of `console.log()` will indeed show the current value of that variable after the reassignment. When you declare a variable with `let`, it is block-scoped and can be reassigned. If you log that variable after changing its value, `console.log()` will output whatever the latest value of the variable is. For instance, if you initially assign a variable with `let`, change it to a different value later in the code, and then log it, you will see the new value. The other options present situations that would not occur when simply reassigning a variable declared with `let`. For example, logging `undefined` would only happen if you tried to access a variable that hasn’t been assigned any value, rather than after a reassignment. A `ReferenceError` would arise if you tried to access a variable that is not declared at all. Finally, saying "the last assigned value only" suggests that it could only show one specific value, while in reality, it can reflect any value assigned before it is logged.