AJAX, or Asynchronous JavaScript and XML, is a web development technique that enables asynchronous communication between a web browser and a server. This allows web pages to update dynamically without requiring a full page reload, improving user experience by making interactions faster and more responsive.
At its core, AJAX combines several technologies:
JavaScript: Handles the client-side scripting to initiate requests and process responses.
XMLHttpRequest (XHR) object: The key API that sends HTTP or HTTPS requests to the server and receives data without interrupting the user.
HTML and CSS: Structure and style the web page elements that get updated.
XML or other data formats: Such as JSON, used to exchange data between the client and server.
Originally popularized in the early 2000s, AJAX revolutionized web applications by enabling features like auto-complete search boxes, live updates on social media feeds, and interactive maps. It works by sending small amounts of data in the background, allowing the page to remain interactive while waiting for a server response.
Table of contents
- Part 1: Create an amazing AJAX quiz using AI instantly in OnlineExamMaker
- Part 2: 20 AJAX quiz questions & answers
- Part 3: Automatically generate quiz questions using AI Question Generator
Part 1: Create an amazing AJAX quiz using AI instantly in OnlineExamMaker
Nowadays more and more people create AJAX quizzes using AI technologies, OnlineExamMaker a powerful AI-based quiz making tool that can save you time and efforts. The software makes it simple to design and launch interactive quizzes, assessments, and surveys. With the Question Editor, you can create multiple-choice, open-ended, matching, sequencing and many other types of questions for your tests, exams and inventories. You are allowed to enhance quizzes with multimedia elements like images, audio, and video to make them more interactive and visually appealing.
Recommended features for you:
● Prevent cheating by randomizing questions or changing the order of questions, so learners don’t get the same set of questions each time.
● Automatically generates detailed reports—individual scores, question report, and group performance.
● Simply copy a few lines of codes, and add them to a web page, you can present your online quiz in your website, blog, or landing page.
● Offers question analysis to evaluate question performance and reliability, helping instructors optimize their training plan.
Automatically generate questions using AI
Part 2: 20 AJAX quiz questions & answers
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Question 1:
What does AJAX stand for?
A. Asynchronous JavaScript and XML
B. Advanced JavaScript and XHTML
C. Automated Java Application Exchange
D. Asynchronous Java Interface Extension
Answer: A
Explanation: AJAX stands for Asynchronous JavaScript and XML, which allows web pages to update asynchronously by exchanging data with a web server.
Question 2:
Which object is primarily used in AJAX to exchange data with a server?
A. JavaScript Object
B. XMLHttpRequest
C. Fetch API
D. JSON Parser
Answer: B
Explanation: The XMLHttpRequest object is the core component of AJAX that enables sending and receiving data from a server without reloading the page.
Question 3:
What is the default behavior of AJAX requests?
A. Synchronous
B. Asynchronous
C. Sequential
D. Parallel
Answer: B
Explanation: AJAX requests are asynchronous by default, meaning they do not block the execution of other scripts while waiting for the server response.
Question 4:
Which property of the XMLHttpRequest object indicates the current state of the request?
A. status
B. readyState
C. responseText
D. onreadystatechange
Answer: B
Explanation: The readyState property tracks the state of the request, with values like 0 (uninitialized) to 4 (complete), helping manage the request lifecycle.
Question 5:
How does AJAX improve web applications?
A. By reloading the entire page
B. By allowing partial page updates
C. By increasing server load
D. By disabling JavaScript
Answer: B
Explanation: AJAX enables partial page updates, making web applications more dynamic and responsive without the need to refresh the whole page.
Question 6:
What type of data format is commonly used with AJAX for lightweight data exchange?
A. HTML
B. XML
C. JSON
D. Both B and C
Answer: D
Explanation: AJAX originally used XML, but JSON is now commonly used as it is lighter and easier to parse, making data exchange more efficient.
Question 7:
Which HTTP method is typically used for sending data in an AJAX request to create or update resources?
A. GET
B. POST
C. DELETE
D. PUT
Answer: B
Explanation: The POST method is used in AJAX to send data to the server for creating or updating resources, as it can handle larger payloads than GET.
Question 8:
What event handler is used to manage state changes in an XMLHttpRequest object?
A. onload
B. onerror
C. onreadystatechange
D. oncomplete
Answer: C
Explanation: The onreadystatechange event handler is triggered whenever the readyState of the XMLHttpRequest changes, allowing code to respond to different stages.
Question 9:
Can AJAX requests be sent to a different domain than the one serving the web page?
A. Yes, without restrictions
B. No, due to same-origin policy
C. Yes, using CORS
D. Only with SSL
Answer: C
Explanation: AJAX requests are restricted by the same-origin policy, but they can be sent to different domains if the server enables Cross-Origin Resource Sharing (CORS).
Question 10:
What is the value of readyState when an AJAX request is complete?
A. 1
B. 2
C. 3
D. 4
Answer: D
Explanation: A readyState value of 4 indicates that the request is complete and the response is ready for processing.
Question 11:
Which of the following is a disadvantage of using AJAX?
A. Improved speed
B. Back button functionality issues
C. Reduced server load
D. Better SEO
Answer: B
Explanation: AJAX can cause problems with browser back buttons and history management, as it updates pages dynamically without full reloads.
Question 12:
In AJAX, how is the server response typically handled?
A. By reloading the page
B. Using callbacks or promises
C. With synchronous loops
D. Via direct variable assignment
Answer: B
Explanation: AJAX responses are handled using callbacks (like onreadystatechange) or modern promises, allowing asynchronous processing of data.
Question 13:
What does the status property of XMLHttpRequest represent?
A. The state of the request
B. The HTTP status code
C. The data size
D. The response type
Answer: B
Explanation: The status property returns the HTTP status code (e.g., 200 for success, 404 for not found), indicating the result of the server request.
Question 14:
Which JavaScript feature can replace XMLHttpRequest in modern AJAX implementations?
A. WebSockets
B. Fetch API
C. setTimeout
D. LocalStorage
Answer: B
Explanation: The Fetch API is a modern alternative to XMLHttpRequest for making AJAX requests, offering a more straightforward and promise-based approach.
Question 15:
How can AJAX help in creating a better user experience?
A. By making the app slower
B. By enabling real-time updates
C. By requiring full page reloads
D. By limiting interactivity
Answer: B
Explanation: AJAX allows for real-time updates and interactive features, such as auto-complete or live search, without interrupting the user.
Question 16:
What security risk is associated with AJAX?
A. Increased encryption
B. Cross-Site Scripting (XSS) attacks
C. Faster loading times
D. Better data validation
Answer: B
Explanation: AJAX can be vulnerable to XSS attacks if user input is not properly sanitized, as it involves dynamic content loading from the server.
Question 17:
In an AJAX request, what does a readyState of 2 mean?
A. The request has been sent
B. The request is loading
C. The request has been initialized
D. The request is complete
Answer: A
Explanation: A readyState of 2 means the request has been sent to the server and headers are being received.
Question 18:
Which of the following is not a typical use case for AJAX?
A. Form validation
B. Loading dynamic content
C. Full page navigation
D. Auto-saving data
Answer: C
Explanation: Full page navigation typically requires a full reload, whereas AJAX is used for partial updates like form validation or auto-saving.
Question 19:
How does AJAX handle errors in requests?
A. Automatically retries
B. Uses the onerror event
C. Ignores them
D. Requires manual page refresh
Answer: B
Explanation: The onerror event in XMLHttpRequest or Fetch API allows developers to handle errors, such as network failures or server errors, gracefully.
Question 20:
What is the role of the open() method in XMLHttpRequest?
A. To send the request
B. To initialize the request
C. To process the response
D. To set headers
Answer: B
Explanation: The open() method initializes the request by specifying the HTTP method, URL, and whether the request is asynchronous.
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Part 3: Automatically generate quiz questions using OnlineExamMaker AI Question Generator
Automatically generate questions using AI