What happens if JavaScript code in the <head> section of an HTML document is not properly handled?
A). It may block rendering and cause delays.
B). It automatically moves to the <body>.
C). It gets executed twice.
D). It has no impact on the page.
Which of the following is a recommended practice for optimizing JavaScript performance?
A). Minify and concatenate scripts.
B). Include all scripts in the <head>.
C). Use synchronous loading for all scripts.
D). Load scripts without optimization.
What happens if JavaScript code in the <body> section of an HTML document is placed before critical content such as headings or main paragraphs?
A). It may cause FOUC (Flash of Unstyled Content).
B). It has no effect on page rendering.
C). It improves page load speed.
D). It slows down script execution.
What is the purpose of using the async attribute with an external JavaScript file in the <head> section?
A). To load and execute the script after HTML parsing.
B). To defer script execution.
C). To block rendering until script loads.
D). To ensure script execution order.
Placing JavaScript at the end of the <body> section is beneficial for:
A). Improving page load speed.
B). Blocking page rendering.
C). Increasing script complexity.
D). Hiding script functionalities.
When using an external JavaScript file in the <head> section with the defer attribute, when does it get executed?
A). After the HTML content is fully parsed.
B). Before the HTML content is parsed.
C). As soon as it starts loading.
D). After all other scripts in the <head>.
Placing JavaScript at the end of the <body> section of an HTML document can result in:
A). Faster initial page rendering.
B). Slower overall page loading.
C). No impact on page performance.
D). Delayed execution of JavaScript.
How can JavaScript be loaded asynchronously in the <body> section without blocking page rendering?
A). Using the defer attribute.
B). Using the async attribute.
C). Including scripts in the <head>.
D). Not possible in the <body>.
Which attribute is used to make an external JavaScript file load and execute after HTML parsing but before the DOMContentLoaded event in the <head> section?
A). async
B). defer
C). sync
D). load
When JavaScript is placed in the <head> section of an HTML document, it can:
A). Execute before page rendering.
B). Execute after page rendering.
C). Block rendering until execution.
D). None of the above.