Learn JavaScript from Scratch JavaScript for Everyone - Selecting Elements by Their IDs
Interactive Video
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Information Technology (IT), Architecture
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University
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Practice Problem
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary purpose of using an ID in HTML?
To define a class for multiple elements
To create a hyperlink
To uniquely identify an element for JavaScript manipulation
To style elements with CSS
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which JavaScript method is used to select an element by its ID?
document.querySelector
document.getElementsByClassName
document.getElementsByTagName
document.getElementById
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when you set the innerHTML of an element?
It changes the ID of the element
It changes only the text content of the element
It changes the HTML structure within the element
It deletes the element
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why should IDs be unique within an HTML document?
To improve page loading speed
To enhance SEO performance
To avoid conflicts in CSS styling
To ensure correct element selection in JavaScript
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the difference between innerText and innerHTML?
innerText includes HTML tags, innerHTML does not
innerHTML includes HTML tags, innerText does not
Both include HTML tags
Neither includes HTML tags
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