<head> section of an HTML document are accessible:
<head> section have a global scope, meaning they can be accessed from anywhere in the document, including other scripts and DOM manipulation outside the <head>.
What is the advantage of placing JavaScript at the end of the <body> section for non-critical scripts?
A). Faster initial page rendering.
B). Slower page load overall.
C). Better script execution order.
D). Increased script complexity.
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.
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.
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.
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.
Which attribute can be used to make external JavaScript files load asynchronously in the <head> or <body> sections?
A). async
B). defer
C). sync
D). load
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 in the <head> section can impact page load times because:
A). It blocks rendering until executed.
B). It loads scripts asynchronously.
C). It reduces HTTP requests.
D). It has no impact on loading.
Using the defer attribute with an external JavaScript file in the <body> 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 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.