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Questions and Answers
Which data formats does AJAX support?
Which data formats does AJAX support?
- JSON, YAML, XML, and Markdown
- XML, JSON, binary data, and CSV
- HTML, XML, binary data, and JSON
- JSON, HTML, plain text, and XML (correct)
What is the role of JavaScript and the Document Object Model (DOM) in AJAX applications?
What is the role of JavaScript and the Document Object Model (DOM) in AJAX applications?
- Optional for dynamic display and interaction
- Exclusively for server-side processing
- Used only for static content
- Crucial for dynamic display and interaction (correct)
Which technology was AJAX invented in?
Which technology was AJAX invented in?
- 2010
- 1995
- 2000
- 2005 (correct)
What is a critical consideration in AJAX implementation?
What is a critical consideration in AJAX implementation?
Which application is cited as an example of employing AJAX?
Which application is cited as an example of employing AJAX?
What are the characteristics of AJAX applications?
What are the characteristics of AJAX applications?
How can AJAX recognition be achieved?
How can AJAX recognition be achieved?
What is the XMLHttpRequest object commonly used for in AJAX?
What is the XMLHttpRequest object commonly used for in AJAX?
What is the purpose of the Origin header added by the browser when using the Fetch API to make a request to a different origin?
What is the purpose of the Origin header added by the browser when using the Fetch API to make a request to a different origin?
What is crucial for AJAX applications to be always responsive?
What is crucial for AJAX applications to be always responsive?
Why does the browser block the response from being accessed by JavaScript code if the server doesn't include the appropriate CORS headers?
Why does the browser block the response from being accessed by JavaScript code if the server doesn't include the appropriate CORS headers?
Which technologies can be utilized with AJAX for data retrieval?
Which technologies can be utilized with AJAX for data retrieval?
What is the primary responsibility of the server when dealing with CORS for cross-origin requests?
What is the primary responsibility of the server when dealing with CORS for cross-origin requests?
What is the advantage of the Fetch API over XMLHttpRequest for making asynchronous requests?
What is the advantage of the Fetch API over XMLHttpRequest for making asynchronous requests?
Why is there a need to focus on the most important content, data, and functions in responsive website design for mobile devices?
Why is there a need to focus on the most important content, data, and functions in responsive website design for mobile devices?
What percentage of users are on mobile devices, as mentioned in the text?
What percentage of users are on mobile devices, as mentioned in the text?
What feature of mobile devices is mentioned as requiring the support of rich, multi-touch interfaces?
What feature of mobile devices is mentioned as requiring the support of rich, multi-touch interfaces?
In the context of mobile web design, what does the term '.mobi site' refer to?
In the context of mobile web design, what does the term '.mobi site' refer to?
What is the primary reason for enforcing CORS by the web browser?
What is the primary reason for enforcing CORS by the web browser?
Why is the Fetch API generally preferred over XMLHttpRequest for new development?
Why is the Fetch API generally preferred over XMLHttpRequest for new development?
What does AJAX stand for?
What does AJAX stand for?
Which of the following is NOT a purpose of using AJAX in web development?
Which of the following is NOT a purpose of using AJAX in web development?
Which technologies are involved in implementing AJAX in web development?
Which technologies are involved in implementing AJAX in web development?
What makes AJAX suitable for real-time data updates on web pages?
What makes AJAX suitable for real-time data updates on web pages?
How does AJAX contribute to reducing server load and bandwidth?
How does AJAX contribute to reducing server load and bandwidth?
What is the primary impact of AJAX on web application speed and responsiveness?
What is the primary impact of AJAX on web application speed and responsiveness?
Which of the following is a key feature of AJAX in web development?
Which of the following is a key feature of AJAX in web development?
Why does AJAX enhance the user experience in web applications?
Why does AJAX enhance the user experience in web applications?
What differentiates AJAX from being a programming language or a tool?
What differentiates AJAX from being a programming language or a tool?
In what way does AJAX allow web pages to be updated asynchronously?
In what way does AJAX allow web pages to be updated asynchronously?
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Study Notes
Understanding AJAX: Key Points
- AJAX enables asynchronous communication between the browser and server, allowing data exchange without disrupting the user interface.
- The XMLHttpRequest object is commonly used in AJAX to fetch data from a server.
- AJAX supports various data formats such as JSON, HTML, and plain text, not just XML.
- JavaScript and the Document Object Model (DOM) are crucial for dynamic display and interaction in AJAX applications.
- AJAX can be utilized with modern web technologies like PHP, ASP.NET, and APIs for data retrieval.
- While modern browsers support AJAX, the specific implementation may vary.
- Security is a critical consideration in AJAX implementation to protect data integrity and prevent unauthorized access.
- AJAX was invented by Jesse James Garrett in 2005 and comprises multiple technologies, including CSS, XHTML, and JavaScript.
- Google Maps is an example of an application that employs AJAX behind the scenes.
- Characteristics of AJAX applications include smooth interaction, immediate data updates, visual effects, and dynamic widgets.
- AJAX interfaces differ from traditional ones as they are manipulated by client-side JavaScript, resulting in an always responsive application.
- Recognizing AJAX can be done through various methods, including the use of iframes, jQuery AJAX functions, and the fetch API.
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