<head> or <body> sections?
Which scenario is suitable for placing JavaScript in the <head> section of an HTML document?
A). Initializing variables or configurations.
B). Dynamic content manipulation.
C). User interaction scripts.
D). External script loading.
Variables declared in the <body> section of an HTML document have what scope by default?
A). Local to the script or function.
B). Global throughout the document.
C). Limited to the <body> section.
D). Not accessible in JavaScript.
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.
Using the defer attribute with an external script in the <head> section means that the script:
A). Loads and executes after HTML parsing.
B). Loads synchronously with HTML parsing.
C). Loads and executes before HTML parsing.
D). Loads but doesn't execute.
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.
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.
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.
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>.
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 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.