Answer & Solution
Answer: Option // This is a comment
Solution:
Single-line comments in JavaScript are created using //, while multi-line comments use /* and */.
Q
How do you comment out code in JavaScript?
Related Questions on Average
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>
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
Can an external JavaScript file be cached by the browser?
A). Yes
B). No
C). Only if specified in the HTML
D). Only if it is under a certain size
What does the async attribute do when used in a <container><script></container> tag?
A). Executes the script immediately
B). Delays script execution until HTML parsing is complete
C). Executes the script asynchronously
D). Executes the script before the HTML parsing begins
What is the effect of using the defer attribute in the <container><script></container> tag?
A). The script will be executed after the HTML document has been fully parsed
B). The script will be executed as soon as it is downloaded
C). The script will not be executed
D). The script will be executed before the HTML document is parsed
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
How do you include an external JavaScript file in an HTML file?
A). <container><script src='filename.js'></container>
B). <container><script href='filename.js'></container>
C). <container><script link='filename.js'></container>
D). <container><script file='filename.js'></container>
What attribute is used to specify the path of an external JavaScript file?
A). href
B). src
C). path
D). file
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
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