AI solution for JavaScript Quiz on BFE.dev
133. toString

The code above will output the following results when each console.log statement is executed:

1. console.log(obj.toString === Object.toString) Output: false

Explanation: In this comparison, obj.toString is undefined because obj is an empty object. Object.toString is a reference to the Object constructor's toString method. Since they are not equal, the comparison returns false.

2. console.log(fun.toString === Function.toString) Output: false

Explanation: Similar to the first comparison, fun.toString is undefined because fun is an empty function. Function.toString is a reference to the Function constructor's toString method. Since they are not equal, the comparison returns false.

3. console.log(obj.toString === Object.prototype.toString) Output: false

Explanation: obj.toString is also undefined in this case, and Object.prototype.toString is a reference to the toString method of the Object prototype. Since they are not equal, the comparison returns false.

4. console.log(fun.toString === Function.prototype.toString) Output: false

Explanation: Similar to the previous comparison, fun.toString is undefined, and Function.prototype.toString is a reference to the toString method of the Function prototype. Since they are not equal, the comparison returns false.

5. console.log(Object.toString === Object.prototype.toString) Output: true

Explanation: In this case, Object.toString is a reference to the toString method of the Object constructor, and Object.prototype.toString is a reference to the toString method of the Object prototype. Since they both refer to the same method (Object.prototype.toString), the comparison returns true.

6. console.log(Function.toString === Function.prototype.toString) Output: true

Explanation: Similarly, Function.toString is a reference to the toString method of the Function constructor, and Function.prototype.toString is a reference to the toString method of the Function prototype. Since they both refer to the same method (Function.prototype.toString), the comparison returns true.