1. What is jQuery?
jQuery is not a programming language but a well
written JavaScript code. It is a JavaScript code, which do document traversing,
event handling, Ajax interactions and Animations.
2. Why jQuery is
needed?
jQuery is needed for the following list:
·
Used to
develop browser compatible web applications
·
Improve
the performance of an application
·
Very
fast and extensible
·
UI
related functions are written in minimal lines of codes
3. Whether jQuery
HTML work for both HTML and XML documents?
No, jQuery HTML only works for HTML documents
not for XML Documents.
4. What are the methods used to provide
effects?
Some of the effects methods are:
·
Show()
·
Hide()
·
Toggle()
·
FadeIn()
·
FadeOut()
5. What is the advantage of using minimized
version of jQuery?
Efficiency of web page increases when minimized version of jQuery is used.min.js file will be more than 50% less than
the normal js file. Reduction in the file size makes
the web page faster.
6. Is jQuery is a
JavaScript or JSON library file?
jQuery is a library of JavaScript file and it
consists of DOM, event effects and the Ajax functions. jQuery is said to be a single JavaScript file.
7. Which operating system is more compatible
with jQuery?
Mac, Windows and Linux are more compatible with the jQuery.
8. How can we include jQuery
library in ASP.Net project?
Download the jQuery library from jQuery.com
and include that reference in the asp.net page.
9. Which command will give a version of jQuery?
The command $.ui.version returns jQuery UI version.
10. In what scenarios jQuery
can be used?
jQuery can be used in following scenarios:
Apply CSS static or dynamic Calling functions on events Manipulation
purpose Mainly for Animation effects
11. What is the difference between find and
children methods?
Find method is used to find all levels down the DOM tree but children
find single level down the DOM tree.
12. What is jQuery
connect?
A jQuery
connect is a plugin used to connect or
bind a function with another function.
Connect is used to execute function from any other function or plugin is
executed.
13. How to use connect?
Connect can be used by downloading jQuery
connect file from jQuery.com and then include that file in the HTML file. Use $.connect
function to connect a function to another function.
14. What are the features of jQuery, has been used in web applications? jQuery uses features like
Sliding, File uploading and accordian in web
applications.
15. What are the browser related issues for jQuery?
Browser compatibility of jQuery plugin is an
issue and needs lot of time to fix it.
16 . Whether we need to add jQuery
file in both Master and Content page?
jQuery file should be added to the Master page and
can use access from the content page directly without having any reference to
it.
17. What are the basic selectors in jQuery?
Following are the basic selectors in jQuery:
·
Element
ID
·
CSS
Name
·
Tag
Name
·
DOM
hierarchy
18. Can we call C# code behind using jQuery?
Yes, we can call C# code from jQuery as it
supports .net application.
19. What is the use jQuery.data
method?
jQuery.data methods is used to associate the data with
the DOM nodes and the objects. This data method makes the jQuery
code clear and concise.
20. What is the use of each function in jQuery?
Each function is used to iterate each and every element of an object. It
is used to loop DOM elements, arrays and the object properties.
21. What is the difference between size and
length of jQuery?
Size and length both returns the number of element in an object. But
length is faster than the size because length is a property and size is a
method.
22. Can we add more than one document.ready function in a page?
Yes, we can add more than one document.ready
function in a page. But, body.onload can be added
once in a page.
23. What is the use of jQuery
load method?
jQuery load method is a powerful AJAX method which
is used to load the data from a server and assign the data into the element
without loading the page. 24. Whether our own specific characters are used in
place of $ in jQuery?
Yes, We can use our own variable in place of $
by suing the method called no Conflict () method.
var sample = $.noConflict()
25. What are the four parameters used for jQuery Ajax method?
The four parameters are
·
URL -
Need to specify the URL to send the request
·
type -
Specifies type of request(Get or Post)
·
data -
Specifies data to be sent to server
·
Cache -
Whether the browser should cache the requested page
26
. What is the use of jQuery
filter?
The jQuery filter is used to filter the
certain values from the object list based on the criteria. Example is to filter
certain products from the master list of products in a cart website.
27. Which program is useful for testing jQuery?
QUnit is used to test jQuery and it
is very easy and efficient.
28. What is CDN?
CDN is abbreviated as Content Distribution network and it is said to be
a group of companies in different location with network containing copies of
data files to maximize bandwidth in accessing the data.
29. What are the two types of CDNs?
There are two types of CDNs:
·
Microsoft
Load jQuery from Ajax
·
CDN
Google Load jQuery from Google libraries API
30. Which sign is used as a shortcut for jQuery?
Dollar ($) sign is used as a shortcut for jQuery.
31. Is jQuery is a
client or server scripting?
jQuery is a client scripting.
32. What is the script build up by jQuery?
jQuery is a Javascript file
and it is single javascript file that contains common
DOM, event effects and Ajax functions.
33. How can we debug jQuery?
There are two ways to debug jQuery:
Debugger keyword
Add the debugger to the line from where we have to start debugging and then
run Visual Studio in Debug mode with F5 function key.
Insert a break point after attaching the process
34. What are all the ways to include jQuery in a page?
Following are the ways to include jQuery in a
page:
·
Local
copy inside script tag
·
Remote copy
of jQuery.com
·
Remote
copy of Ajax API
·
Local
copy of script manager control
·
Embedded
script using client script object
35. What is the use of jQuery.ajax
method ()? jQuery.ajax
method is used for
asynchronous HTTP requests.
36. Where can we download JQuery?
jQuery javascript can be
downloaded from jQuery official website
www.jquery.com
37. Is jQuery is a
replacement of JavaScript?
No, jQuery is not a replacement of JavaScript.
38. What is called chaining?
Chaining is used to connect multiple events and functions in a selector.
39. What are the advantages of jQuery?
Following are the advantages of jQuery:
Just a JavaScript enhancement Coding is simple, clear, reusable Removal
of writing more complex conditions and loops
40. Whether C# code behind can be called from
jQuery?
Yes, we can call C# code behind from jQuery.
41. What is the use of jQuery.data() method?
jQuery data method is used to associate data with
DOM nodes and JavaScript objects. This method will make a code very concise and
neat.
42. What is the difference between onload()
and document.ready()?
In a page, we can have only one onload
function but we can have more than one document.ready
function. Document.ready function is called when DOM
is loaded but onload function is called when DOM and
images are loaded on the page.
43. What is the use of jQuery
each function?
jQuery each function is used to loop through each
and every element of the target jQuery object. It is
also useful for multi element DOM, looping arrays and object properties.
44. How method can be called inside code
behind using jQuery?
$.ajax can be called and by declaring WebMethod inside code behind using jQuery.
45. Which is the fastest selector in jQuery?
ID and Element are the fastest selectors in jQuery.
46. What is the slowest selector in jQuery?
Class selectors are the slowest selectors in jQuery.
47. Where jQuery
code is getting executed?
jQuery code is getting executed on a client
browser.
48. What is the method used to define the
specific character in place of $ sign?
NoConflict method is used to reference a jQuery and save it in a variable. That variable can be used
instead of Sign.
49. Why jQuery is
better than JavaScript?
jQuery is a library used for developing Ajax
application and it helps to write the code clean and concise. It also handles
events, animation and Ajax support applications.
50. What are the types of selectors in jQuery?
There are three types of selectors in jQuery:
·
CSS
Selector
·
XPath
Selector
·
Custom
Selector