What happens if document.write() is used within an external script file? | JavaScript | MYTAT

Q

What happens if document.write() is used within an external script file?

A). It appends content to the end of the document. B). It overwrites the entire content of the document. C). It triggers an error in the browser console. D). It inserts content into the <head> section.

Answer & Solution

Answer: Option Option B

Solution:

If document.write() is used within an external script file and executed after the document has loaded, it overwrites the entire content of the document. This behavior can cause issues with the document structure and layout, as well as unexpected behavior in the webpage. It is recommended to use document.write() within the HTML document itself, preferably before the document has finished loading, to avoid such issues and ensure proper integration of dynamically generated content.

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Which method is commonly used as an alternative to document.write() for dynamic content generation in modern JavaScript development?

A). jQuery

B). React.js

C). AJAX requests

D). innerHTML

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How does document.write() impact the SEO (Search Engine Optimization) of a webpage?

A). It improves SEO by adding dynamic keywords to the document.

B). It has no impact on SEO.

C). It may negatively impact SEO by affecting page load times.

D). It optimizes page ranking by adding meta tags dynamically.

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How does document.write() impact the performance of a webpage?

A). It improves the performance by reducing page load times.

B). It has no impact on performance.

C). It may degrade performance due to delays in content rendering.

D). It optimizes code execution for better performance.

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Which scenario is appropriate for using document.write() in JavaScript?

A). Displaying static content on a webpage.

B). Updating content within specific HTML elements.

C). Generating dynamic content based on user interactions.

D). Validating form data before submission.

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What happens if document.write() is executed after the document has finished loading?

A). It appends content to the end of the document.

B). It overwrites the entire content of the document.

C). It triggers an error in the console.

D). It inserts content before the <head> section.

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Which method should be avoided when using document.write() in JavaScript?

A). Including multiple document.write() statements within one script.

B). Encapsulating document.write() within functions.

C). Using document.write() to generate dynamic content.

D). Executing document.write() before the <body> tag.

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Which scenario is NOT suitable for using document.write() in JavaScript?

A). Creating a login form with validation.

B). Generating a personalized greeting message.

C). Displaying real-time data from an external API.

D). Adding event listeners to form elements.

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How can document.write() be used to create a simple HTML structure?

A). By executing JavaScript code directly.

B). By defining external references within the content.

C). By concatenating strings to form HTML elements.

D). By using CSS transitions to generate elements.

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Which method can be used to ensure proper document structure when using document.write() in JavaScript?

A). Using document.createElement() alongside document.write().

B). Including document.write() within external script files.

C). Combining document.write() with external CSS stylesheets.

D). Executing document.write() after the document has loaded.

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Which of the following is NOT a common use case for document.write() in JavaScript?

A). Generating dynamic content based on user input.

B). Embedding external resources such as scripts or stylesheets.

C). Displaying personalized messages or greetings.

D). Creating complex data structures or algorithms.

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