Question

Which of the following Node types have a node value equal to null?

(a) Document

(b) DocumentFragment

(c) DocumentType

(d) All of the mentioned

I had been asked this question in homework.

This interesting question is from Node Operations in JavaScript topic in portion Document Object Model and Event Handling in Javascript of JavaScript

Answer 1

The correct answer is (d) All of the mentioned

Easy explanation: All the three node types namely, Document, DocumentFragment, DocumentType have a node value equal to null. If the node is an element node, the nodeType property will return 1. If the node is an attribute node, the nodeType property will return 2.