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15 Must Know UI Development Questions

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These questions can also be used in interviews.  If you are stuck with a question, please leave comment here on my blog.The questions are of basic and intermediate level. Moreover, the interviewer can ask you some and not all of these questions.

  1. Describe various projects that you have developed or provided support for?
  2. Tell me some issues you faced because of not following the w3c standards?
  3. If you are asked to develop a travel booking portal having rich UI effects, what steps will you take?
  4. What do you understand by DOM?
  5. What do various javascript frameworks like DOJO, Jquery or Prototype help us in achieving?
  6. What are the various tricks that you have followed to decrease the loading time of a website?
  7. How will you detect the type and version of a browser?
  8. What is the use of innerHTML property?
  9. What steps will you take to invoke an EJB work flow using AJAX requests in a web application?
  10.  Which is your favorite web browser for web application development? Why?
  11.  What all features of HTML 5 are you aware of?
  12. Will you consider the idea of creating one big JS or CSS file than smaller JS/CSS files in the production environment? What other optimization steps can you take in the production environment?
  13. How do you usually get away with javascript errors in a web page?
  14. What are the best practices for writing javascript code? Are you aware of JSON?
  15. What is POST/REDIRECT/GETdesign pattern? What other design patterns have you used as a front end developer?


Published at DZone with permission of its author, Sandeep Bhandari.

(Note: Opinions expressed in this article and its replies are the opinions of their respective authors and not those of DZone, Inc.)


Karl Peterbauer replied on Thu, 2011/06/02 - 7:25am

Sorry, but I would immediately withdraw my job application when being asked such fluffy stuff.

Question 2 is rather strange with respect to the issues we all face because the developers of a certain, widely used browser family bluntly refuse to follow W3C standards. Otherwise one would not have to detect the user agent at all (question 7).

What is an "EJB work flow" of question 9 meant to be? What do you expect as answers for questions 13 and 14? (My answer as seasoned GWT developer: I avoid writing JavaScript at all, because it's inherently error prone ;-) 

 And finally: POST/REDIRECT/GET is not a "design pattern" (such as an MVC pattern), instead it's primarily mandated by the underlying HTTP protocol and cannot be avoided in most cases.

Sam Lewis replied on Thu, 2011/06/02 - 6:02pm

POST/REDIRECT/GET is a design pattern

Walter Bogaardt replied on Thu, 2011/06/02 - 7:00pm

Initially I thought this was general UI, but this is more WEB based UI. That said what about Tapestry, JBoss Seam, RichFaces, or even Flex and other frameworks centered around Rich UI on the web? I would think those are valid questions, but at an intermediate level its something a developer should start to have a little experience in if not heard of them. Especially for a web development based company.

Naiden Gochev replied on Fri, 2011/06/03 - 4:45am

I cannot agree with that.

This questions are simply WRONG.


Why because UI development  doesn't mean JavaScrpit and HTML.


Actually you can be very good UI developer without knowing WTF is DOM. I even believe you will be better and make better UI if you dont know and if you dont care about DOM and all this HTML and JavaScript crap.


For example if you are a Java UI Developer it is better to know Java2D to know how to handle complex animations to have perfect knowadge about threads and bitmaps. To have a strong OO knowadge and .. to not care about JavaScript and DOM.

If you are a Flex developer, you dont care about Threads like a Java UI developer but you care about other stuf still NO DOM or JavaScript or HTML5. 

If you are Silverlight/WPF developer check the Flex developer. 

if you are WinForms developer cehck the Java Developer.


Actually all your questions are if you are a Web Front-end developer (Web UI developer) and even this is not comletly correct because there is a ZK and other frameworks which are build based on the idea that DOM is simply BROKEN and HTML as well and you should use something BETTER.

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