AJAX Interview Questions & Answers

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Technical interview questions and answers are critical when preparing for an AJAX Interview because companies want to evaluate your understanding of asynchronous communication, XMLHttpRequest, JSON handling, DOM manipulation, and interactive web applications. AJAX is considered a core concept in modern web development, and many companies include it as part of their technical rounds for frontend and full-stack developer roles. Organizations like TCS, Infosys, Wipro, Cognizant, and Capgemini frequently ask AJAX-related questions to check whether candidates can build dynamic, responsive, and efficient web pages. This guide includes commonly asked AJAX interview questions with clear explanations to help freshers and job seekers strengthen their web development fundamentals. These questions will improve your preparation for placement interviews, coding rounds, and real-time project discussions.

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191. What is the difference between proc. sent BY VAL and BY SUB?

BY VAL: changes will not be reflected back to the variable. By REF: changes will be reflected back to that variable.( same as & symbol in c, c++)

192. Did Adaptive Path invent Ajax? Did Google? Did Adaptive Path help build Googles Ajax applications?

Neither Adaptive Path nor Google invented Ajax. Googles recent products are simply the highest-profile examples of Ajax applications. Adaptive Path was not involved in the development of Googles Ajax applications, but we have been doing Ajax work for some of our other clients.

193. Does Ajax have significant accessibility or browser compatibility limitations? Do Ajax applications break the back button? Is Ajax compatible with REST? Are there security considerations with Ajax development? Can Ajax applications be made to work for users who have JavaScript turned off?

The answer to all of these questions is “maybe”. Many developers are already working on ways to address these concerns. We think theres more work to be done to determine all the limitations of Ajax, and we expect the Ajax development community to uncover more issues like these along the way.

AJAX Interview Questions & Answers

191. What is the difference between proc. sent BY VAL and BY SUB?

192. Did Adaptive Path invent Ajax? Did Google? Did Adaptive Path help build Googles Ajax applications?

193. Does Ajax have significant accessibility or browser compatibility limitations? Do Ajax applications break the back button? Is Ajax compatible with REST? Are there security considerations with Ajax development? Can Ajax applications be made to work for users who have JavaScript turned off?

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