Question

Assume you have a page with four paragraph tags. What is the proper JavaScript code to change the content of the second paragraph to "What does the Fox say?"

A. document.getElementsByTagName('p')[1].innerHTML = "What does the Fox say?"
B. document.getElementById('second').innerHTML = "What does the Fox say?"
C. document.getElementByTagName('p')[2].innerHTML = "What does the Fox say?"
D. document.getElementById('p')[2].innerHTML = "What does the Fox say?"E. document.getElementsByTagName('p').innerHTML = "What does the Fox say?"

Answer 1

The proper JavaScript code to change the second paragraph's content is: document.getElementsByTagName('p')[1].innerHTML = "What does the Fox say?". It uses the right collection index and sets innerHTML for the targeted paragraph.

Step-by-step explanation:

The correct answer to the question of how to change the content of the second paragraph to "What does the Fox say?" using JavaScript is:

A. document.getElementsByTagName('p')[1].innerHTML = "What does the Fox say?"

This is the proper line of JavaScript code, as it uses the getElementsByTagName method, which returns an HTMLCollection of all elements with the specified tag name, in this case 'p' for paragraphs. Since the collection is zero-indexed, [1] refers to the second paragraph. By setting the innerHTML property, we update the content of that paragraph.

Each of the other options has something incorrect:

• Option B assumes there is an element with id 'second', which might not be the case.
• Option C has a typo: it should be getElementsByTagName not getElementByTagName, and it incorrectly uses the index [2], which would select the third paragraph.
• Option D incorrectly tries to use getElementById with a tag name 'p' and an index, which is not valid syntax.
• Option E attempts to set innerHTML on the entire collection, which is not possible since innerHTML needs to be set for individual elements within the collection.