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jQuery Basic Interview Question
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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
