10 popular AJAX Interview Questions
While it is indubitably true that modern day interview sessions involve cut throat competition, the core idea, as ever, is to hone your fundamentals in order to come up with innovative problem solving skills. Keeping that in mind, here are some of the most common AJAX interview questions that you can go through before your next interview.
1. Is AJAX a programming language?
No, it is not. AJAX is an innovative technique designed for the purpose of creating modern day rapidly performing web applications in order to make the world of internet faster and more conducive to users. Importantly, AJAX primarily makes use of asynchronous data transfer between the web server and the browser.
2. Can you tell us how many triggers are available in the so called update panel in AJAX?
Essentially, there are two types of triggers present. The Post Back trigger does not work in an asynchronous manner while the Async Post Back Trigger functions asynchronously.
3. In spite of so many modern web applications available, what do you think are the peculiar advantages of using AJAX?
AJAX consists of many viable advantages which are especially conducive to the user and the purpose. For instance, the foremost merit is that it saves a good deal of memory when you fetch data from the same page. Also, it is relatively quicker than the rest and peculiarly interactive to a whole new level.
4. Are there no disadvantages of AJAX then?
That is far from the fact. In fact, there are many. For instance, debugging is rather intricate and strenuous. Apart from that, you might face a problem with its application dependent on Java Script. In other words, if your browser does not corroborate Java Script, AJAX is apparently of no use. Also, the source code is extremely readable and therefore core security reasons linger in AJAX. Perhaps this is the biggest demerit of working with AJAX.
5. We mentioned the update panel. What do you think is its core functionality?
So far as the update panel is concerned, it is chiefly used to add functionality to the extant ASP.NET applications. As the name suggests, the update panel is used for updating and refreshing a portion of the page instead of the whole page.
6. One of the demerits of AJAX is the redundant flow of requests. How can we hope to tackle simultaneous requests in AJAX?
In order to tackle concurrent requests, the respective Java script functions need to be written. Having written the functions, the call back function can be applied as a parameter in order to tackle simultaneous requests. The concerned parameters are then passed to what is known as the AjaxInteraction object in order to tackle the concurrency of incoming requests.
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7. Why is AJAX known as Control Extender Toolkit?
Literally said, the Extender Toolkit is one of the extenders that are used to extend the core functionalities of the ASP.NET controls. It can download for free from the net.
8. What do you understand by the script manager?
Chiefly, the Script Manager acts as a perfunctory mediator. It is essentially important for the management of the client-side script of AJAX. It is important to note that any page that uses AJAX has a Script Manager in order to enable the application of AJAX libraries.
9. What do you understand by JSON in AJAX?
10. So, what do you think are the eventual objectives of AJAX in the first place?
AJAX has many potential objectives. First and foremost, it is used to mitigate the intensity of core network load, not to mention building a highly interactive user interface. Also, a reduced web server hit is one of the major goals of using AJAX. Additionally, platform and architecture neutrality continues to be the rudimentary aspects of AJAX. Moreover, it is also used for the purpose of both synchronous and asynchronous communication.
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