Top 100+ Dojo Toolkit Interview Questions And Answers
Question 1. Explain What Is Dojo?
Answer :
Dojo is a JavaScript framework, an assembly of utilities written to ease development of customer-side internet programs. It is a tool for building dynamic internet person interfaces.
Question 2. What Is The Basic Structure In Dojo?
Answer :
The fundamental listing structure of the software is very simple and it'll evolve later:
/index.Html - The software access factor.
/app - The utility module.
/app/most important.Js - The essential script for app module.
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Question 3. Explain The Function Of Dojo/equipped Module?
Answer :
The dojo/equipped module has a characteristic that statistics a callback so as to run once the three situations have met:
DOM is prepared
All extremely good or final modules of requested code have completed loading
Other registered features with a better precedence have completed.
Question 4. What Are The Advantages Or Benefits Of Dojo?
Answer :
Associative arrays
Loosely typed variables
Regular expressions
Objects and instructions
Highly developed date, math, and string libraries
W3C DOM assist in the Dojo
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Question five. Explain What Are Application Support Libraries In Dojo?
Answer :
Application support libraries in Dojo includes:
I/O package deal affords routines, e.G., for AJAX binding
For drag and drop operations DND package presents exercises
Useful exercises are available for login, animation and garage.
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Question 6. What Is The Point In Dojo?
Answer :
Dojo bases on the HTML and JavaScript
Developer has no longer to apply any ordinary programming language
Dojo u.S.Abstraction layer in a better level
Developer has no longer to reinvent wheel whilst beginning programming venture
Question 7. List Out Some Of The Dijit Layout Widgets?
Answer :
ContentPane
LinkPane
Border Container
Tab Container
Split Container
Stack Container
Accordion Container
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Question 8. Give Some Components That Comes Along With Dojo Framework?
Answer :
DOJO Tree
DOJO Button
DOJO Calendar manipulate
DOJO Grid
DOJO List box
Question nine. What Is The History Of Dojo?
Answer :
Development was commenced with the aid of Alex Russell and Dylan Schiemann in 2004
The first Dojo code was written in Septemper 2004
Nowadays forty 000 downloads and over 40 developers and agencies
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Question 10. List Out Some Of The Components That Come Along With Dojo Framework?
Answer :
Components that comes in conjunction with Dojo Framework includes:
Dojo Tree
Dojo List container
Dojo Calendar manipulate
Dojo Grid
Dojo Button, and so on.
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Question 11. What Are The Features Of Dojo?
Answer :
Dojo is based on HTML and JavaScript, so its smooth for the developers to study it rapid.
There is no requirement of gaining knowledge of new programming language. Just HTML and JavaScript knowledge if enough.
Dojo offers higher abstraction layer to the programmer. So, it enables the programmers to broaden powerful capabilities very without problems.
Dojo has already invented the wheels for the programmers and now programmers just should use the Dojo api into their utility
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Question 12. Mention What Are The Drawbacks Of Dojo?
Answer :
For Dojo, developer has to rely on the browser support
In the case of commercial software there is no way to cover the Dojo code.
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Question thirteen. What Is Package System In Dojo?
Answer :
Dojo includes JavaScript files
Package system takes care that simplest wanted files are included
Each JavaScript document may be named as bundle dojo.Provide(dojo.String)
By that call the bundle can be taken in use dojo.Require(dojo.String)
One has no longer to remember any record or directory names
Only dojo.Js has to be protected into HTML record
That record takes care of initialization of Dojo
There is a couple of pre packaged builds that consist of different forms of applications e.G. Widget, occasion or IO builds.
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Question 14. Mention What Are Modules In Dojo?
Answer :
In Dojo, Modules are person codes that can be loaded separately. They are identifying using a string this is similar to the file direction where the code is described.
Example: my/module/elegance.
Question 15. What Are The Disadvantages Of Dojo?
Answer :
Even if Dojo is exceptional, stunning and so forth, it's far quite heavy
The documentation remains quite slender
Needs a great deal network
Developer relies upon on the browser help for the Dojo
There is no manner to cover the Dojo code in case of business application
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Question 16. What Does All Include In Dojo Architecture?
Answer :
Dojo Architecture consists of :
DojoX
Dijit
Dojo Core
Dojo Base
Custom code
Util
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Question 17. Tell Us About Language Libraries In Dojo?
Answer :
dojo.Lang.*
Wrappers for not unusual idioms
Functional programming APIs
For Example:
dojo.Lang.ForEach
dojo.Lang.Map
dojo.Lang.Assert
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Question 18. Explain Whether Dojo Is A Part Of Ajax And Distinguishes Their Roles?
Answer :
Dojo isn't part of Ajax; it's miles an open source JavaScript toolkit, designed to ease the short improvement of JavaScript or Ajax-based applications and web sites. It gives you with masses of custom components like information grid, scroller, calendar, etc. It serves a few facts-shape mode like series and array listing, and it additionally provides a few advanced API’s like API to make AJAX calls.
While, AJAX is an Asynchronous JavaScript and XML, collectively they make it viable to make JavaScript feature call in your server and trigger a response. They use XMLHttpRequest and XMLHttp reaction object.
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Question 19. What Is Widget Toolkit In Dojo?
Answer :
Widget toolkit is likewise a completely substantive part of Dojo toolkit
Widget is a user interface item that has a layout and some properties
In Dojo widgets are HTML+CSS sure via JavaScript
Dojo has plenty of useful widgets e.G. Tabs, sorting desk, dialogs
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Question 20. Explain What Is Dijit And Dojox?
Answer :
Dijit: It is a widget system and factor library layered on pinnacle of Dojo it permits the consumer to re-use or use reprogrammed widget
DojoX: It incorporates widgets, utilities and classes that aren't but prepared for inclusion in the foremost Dojo library. It has experimental elements and widgets.
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Question 21. Describe Event System In Dojo?
Answer :
”Like crack for net developers”
Any feature can be notified whilst other function fires
Any DOM object can be linked to any characteristic dojo.Event.Connect(”identity”, ”onClick”, listenerObj, ”handleOnClick”);
Question 22. Mention What Are The Limitations Of Dojo?
Answer :
Limitation of Dojo are :
It needs an awful lot network
Developer remains depending on the browser guide for the Dojo
In the case of business application there's no way to cover the Dojo code
Documentation is quite narrow
In the case of commercial utility there is no way to cover the Dojo code.
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Question 23. What Is The Relation Between Ajax And Dojo?
Answer :
Dojo is every so often marketed as AJAX framework
It is capable of make AJAX requests with Dojo
But the technique of binding is below the abstraction layer that Dojo has.
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Question 24. Explain What Makes A Widget?
Answer :
A widget is made from resources:
A .Js record that is composed the good judgment of the widget
An HTML snippet that incorporates the manner the widget is offered
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Question 25. Tell Us About Environment-particular Libraries In Dojo?
Answer :
Libraries presents workouts for handling the environment
Consist of svg, html, style and dom programs
Provides some strategies for arrange HTML record
There is also methods for handling DOM bushes and SVG models
Those workouts expand existing exercises
Question 26. Example Of Dojo Script Using Widgets?
Answer :
<script>
dojo.Require(”dojo.Widget.Editor2”);
</script>
<!-- ... -->
<textarea dojoType=”Editor2”>
...
</textarea>
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Question 27. Explain Event System In Dojo?
Answer :
”Like crack for internet developers”
Any characteristic may be notified whilst different characteristic fires
Any DOM item may be linked to any feature dojo.Occasion.Connect(”identification”, ”onClick”, listenerObj, ”handleOnClick”);
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Question 28. Are Applications Using Dojo Mobile Accessible?
Answer :
Some Dojo Mobile widgets aren't accessible. For instance, the ScrollableView can only be scrolled by using using contact gestures. You must increase alternative methods, ex. Buttons for scrolling, to ensure accessibility. Other examples requiring alternatives are SwapView turn and ListItems enhancing.
Question 29. Do You Know Why Does In Many Of Tests Html Files Have Style="visibility:hidden;"?
Answer :
It is to prevent uncooked HTML rendering end result from being proven before dojo’s rendering finishes. The visibility could be restored by way of the initialization code in dojox/mobile/common.
Question 30. In Which Language, Dojo Written?
Answer :
JavaScript.
Question 31. Do I Have To Use Dojox/mobile/parser For Dojo Mobile Applications?
Answer :
No, you don’t must. Dojox/cell/parser is a subset of dojo.Parser. Usage and the way it works are basically the identical. It has no mobile specific features. Dojox/cell/parser’s ONLY advantage over dojo.Parser is its smaller code length. If your utility sadly does no longer work with dojox/cellular/parser, you could replace it with dojo.Parser. Also if you are embeding your mobile application in an hybrid box such as Cordova, the scale may not depend that an awful lot and you might opt to pick out the total parser.
Question 32. How Is The Code Size Of Dojox/cellular/parser Compared To Dojo/parser?
Answer :
In Dojo 1.9 the dimensions of dojox/mobile/parser is 2KB (constructed and gzipped), whilst dojo/parser (plus its based modules that aren't required by using the dojox/cellular base) is 5KB.
Question 33. What Is The Difference Between Dojox/cellular/parser And Dojo.Parser?
Answer :
Some of the superior functions of dojo.Parser, consisting of <script type=”dojo/method”> and <script type=”dojo/connect”>, are missing. Basic capabilities are like minded with dojo.Parser.
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Question 34. How Do I Develop Applications Which Support Ios Voiceover?
Answer :
Make certain to set the alt, name and role attributes. VoiceOver will read widgets with these attributes set. See tests/test_a11y.Html for examples. However, the value of a SpinWheel cannot be read through VoiceOver in 1.Eight.
Question 35. Can You Change The Widget Text Size By Changing The Browser Text Size?
Answer :
No, we recommend which you use the page zoom function available on a few browsers for this cause.
Question 36. Is There A Way To Set An Alternative Text To Images And Dom Buttons?
Answer :
Yes, you could set the alt attribute for pics and the title attribute for DOM buttons. See assessments/test_a11y.Html for examples.
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Question 37. Can You Set The Tab Focus Sequence For Destop Browsers?
Answer :
Yes, use the tabindex characteristic for this purpose. IconItem, IconMenuItem, ListItem, TabBarButton and ToolBarButton all have the tabindex attribute first of all set to zero through default.
Question 38. Are Applications Keyboard Accessible On Desktop Browsers?
Answer :
Yes, except for ScrollableView and SwapView. These widgets require alternative ways to scroll and flip, ex. Buttons.
