Answer & Solution
Answer: Option .js
Solution:
JavaScript files use the .js extension.
Q
Which file extension is used for JavaScript files?
Related Questions on Average
How do you comment out code in JavaScript?
A). // This is a comment
B). /* This is a comment */
C). <!-- This is a comment --!>
D). ## This is a comment
What is the correct syntax for referring to an external script called 'app.js'?
A). <container><script src='app.js'></container>
B). <container><script href='app.js'></container>
C). <container><script link='app.js'></container>
D). <container><script file='app.js'></container>
How can you prevent an external JavaScript file from being cached by the browser?
A). Add a query string to the src attribute
B). Use the async attribute
C). Use the defer attribute
D). It is not possible to prevent caching
What is the difference between the defer and async attributes in the <container><script></container> tag?
A). defer delays execution until after the HTML document is fully parsed, while async executes as soon as it is downloaded
B). defer executes the script immediately, while async delays execution until after HTML parsing is complete
C). defer and async both delay script execution until after HTML parsing is complete
D). There is no difference between defer and async attributes
Where should the <container><script></container> tag be placed in HTML?
A). In the <container><head></container> section
B). In the <container><body></container> section
C). At the end of the <container><body></container> section
D). All of the above
Which HTML tag is used to link an external JavaScript file?
A). <container><script></container>
B). <container><link></container>
C). <container><style></container>
D). <container><js></container>
What attribute is used to specify the path of an external JavaScript file?
A). href
B). src
C). path
D). file
What happens if the external JavaScript file is not found?
A). The browser will ignore the script
B). The browser will show a 404 error
C). The script will not run
D). All of the above
Can an external JavaScript file contain HTML?
A). Yes
B). No
C). Only if it is within a <container><script></container> tag
D). Only if it is within a <container><body></container> tag
How do you execute JavaScript code after the HTML document has loaded?
A). Use the defer attribute in the <container><script></container> tag
B). Place the <container><script></container> tag at the end of the <container><body></container> section
C). Use the async attribute in the <container><script></container> tag
D). All of the above