Client Side Scripting :: JQuery Programmer Job Interview Questions and Answers

JQuery Programmer Frequently Asked Questions in various JQuery Developer job Interviews by interviewer. The set of questions here ensures that you offer a perfect answer posed to you. So get preparation for your new job hunting

1 Explain what is jQuery?
2 In what scenarios jQuery can be used?
3 Tell me what is jQuery connect?
4 How to use connect?
5 What are the basic selectors in jQuery?
6 What is the use of jQuery load method?
7 What is CDN?
8 How can we debug jQuery?
9 What is the use of jQuery.data() method?
10 Why jQuery is better than JavaScript?
11 How method can be called inside code behind using jQuery?
12 Tell us what are the advantages of jQuery?
13 Is jQuery is a client or server scripting?
14 What are the four parameters used for jQuery Ajax method?
15 Whether we need to add jQuery file in both Master and Content page?
16 What are the methods used to provide effects?
17 Why jQuery is needed?
18 What are the browser related issues for jQuery?
19 Which program is useful for testing jQuery?
20 What is called chaining?
21 What is the method used to define the specific character in place of $ sign?
22 What are the core features of jQuery?
23 What is closure?
24 What is a jQuery selector?
25 How to select single element using jQuery with the given element id some-id?
26 Whether jQuery HTML work for both HTML and XML documents?
27 Can we call C# code behind using jQuery?
28 Where can we download JQuery?
29 Is jQuery is a replacement of JavaScript?
30 How will you make sure that DOM is ready using jQuery?
31 Which built-in method sorts the elements of an array?
32 How to remove an attribute from each of the matched elements using jQuery?
33 What is the advantage of using minimized version of jQuery?
34 What is the use of each function in jQuery?
35 What are all the ways to include jQuery in a page?
36 What are the types of selectors in jQuery?
37 Which built-in method returns the character at the specified index?
38 How to know if a specified class is present on at least one of the set of matched elements using jQuery?
39 How to set the text contents of an element using jQuery?
40 Is jQuery is a JavaScript or JSON library file?
41 Can we add more than one 'document.ready' function in a page?
42 Explain what is the use of jQuery each function?
43 What is callback?
44 How to select elements using jQuery whose css class is some-class?
45 How to get the html contents (innerHTML) of an element using jQuery?
46 How to select a subset of the matched elements using jQuery?
47 Which operating system is more compatible with jQuery?
48 What is the use of jQuery filter?
49 Which is the fastest selector in jQuery?
50 Give an example of closure?
51 How can you apply a style on an element using jQuery?
52 How to reduce the set of matched elements to a single element using jQuery?
53 How can we include jQuery library in ASP.Net project?
54 Which sign is used as a shortcut for jQuery?
55 Where jQuery code is getting executed?
56 How can you create an Object in JavaScript?
57 How to add the specified class if it is not present, remove the specified class if it is present using jQuery?
58 How to find all the child nodes inside the matched elements (including text nodes), or the content document, if the element is an iframe using jQuery?
59 How to find all sibling elements after the current element using jQuery?
60 How to find all sibling elements in front of the current element using jQuery?
61 What is the script build up by jQuery?
62 How to resolve conflict with another JavaScript library if $ is already being in use?
63 How to remove all or the specified class(es) from the set of matched elements using jQuery?
64 How to removes elements matching the specified selector from the set of matched elements using jQuery?
65 How to get a set of elements containing the closest parent element that matches the specified selector, the starting element included using jQuery?
66 How to get a set of elements containing the unique previous siblings of each of the matched set of elements using jQuery?
67 How to get the inner height (excluding the border) of an element using jQuery?
68 How to select elements using jQuery with the given element tag-name?
69 How to get a set of elements containing all of the unique immediate children of each of the matched set of elements using jQuery?
70 How to get a set of elements containing all of the unique siblings of each of the matched set of elements using jQuery?
71 How to get the current offset of the first matched element, in pixels, relative to the document using jQuery?
72 How to get the top and left position of an element relative to its offset parent using jQuery?
73 Which command will give a version of jQuery?
74 What is the use jQuery.data method?
75 What are the two types of CDNs?
76 Which built-in method returns the length of the string?
77 How to select multiple elements using jQuery?
78 How to get the input value of an element using jQuery?
79 How to add more elements, matched by the given selector, to the set of matched elements using jQuery?
80 How to revert the most recent 'destructive' operation, changing the set of matched elements to its previous state using jQuery?
81 How to get a set of elements containing the unique next siblings of each of the given set of elements using jQuery?
82 How to get a set of elements containing the unique ancestors of the matched set of elements using jQuery?
83 How to get the outer height (including the border) of an element using jQuery?
84 How to remove all child nodes from the set of matched elements using jQuery?
85 How to check if event.preventDefault() was ever called on this event object using jQuery?
86 How to check if event.stopImmediatePropagation() was ever called on this event object?
87 How to make a ajax call using jQuery?
88 How can we give face effect in jQuery?
89 What is .siblings() method in jQuery?
90 What is the difference between find and children methods?
91 What is the use of jQuery.ajax method ()?
92 What is the slowest selector in jQuery?
93 How to get the text contents of an element using jQuery?
94 How to filter out elements from a set of matched elements using jQuery?
95 How to get a jQuery collection with the positioned parent of the first matched element?
96 How to get the inner width (excluding the border) of an element using jQuery?
97 How to set the width of an element using jQuery?
98 How to bind a handler to one or more events (like click) for an element using jQuery?
99 Explain the animate function?
100 Explain bind() vs live() vs delegate() methods?
101 Can we use our own specific character in the place of $ sign in jQuery?
102 What are the features of jQuery, has been used in web applications?
103 What is the difference between onload() and document.ready()?
104 How to search for descendent elements that match the specified selectors using jQuery?
105 How to check if event.stopPropagation() was ever called on this event object?
106 How to binds a function to be executed whenever the DOM is ready to be traversed and manipulated using jQuery?
107 Explain width() vs css('width')?
108 Explain slideToggle() effect?
109 Is window.onload is different from document.ready()?
110 Is it possible to use other client side libraries like MooTools, Prototype along with jQuery?
111 What is the difference between size and length of jQuery?
112 Whether C# code behind can be called from jQuery?
113 How to get attributes of an element using jQuery?
114 How to get the outer width (including the border) of an element using jQuery?
115 How to attach a function to be executed whenever an AJAX request completes using jQuery?
116 Explain what is the use of jQuery.data()?
117 Explain what does dollar sign ($) means in jQuery?
118 What is difference between $(this) and 'this' in jQuery?
119 Explain .empty() vs .remove() vs .detach()?
120 What is jQuery.noConflict?
121 Which are the popular jQuery CDN? and what is the advantage of using CDN?
122 How do you select element by ID in jQuery?
123 What does $("div.parent") will select?
124 Whether our own specific characters are used in place of $ in jQuery?
125 How to checks the current selection against an expression using jQuery?
126 How to set the height of an element using jQuery?
127 How to stop the bubbling of an event to parent elements using jQuery?
128 Explain the each() function?
129 What is the basic need to start with jQuery?
130 What is the use of param() method?
131 How to read, write and delete cookies using jQuery?
132 Why there are two different version of jQuery library?
133 Which is fast document.getElementByID('txtName') or $('#txtName')?
134 How do you implement animation functionality?
135 What is the difference between .empty(), .remove() and .detach() methods in jQuery?
136 What is the difference between event.PreventDefault and event.stopPropagation?
137 How to set the value of an element using jQuery?
138 How to select all elements using jQuery?
139 How JavaScript and jQuery are different?
140 Can we have multiple document.ready() function on the same page?
141 What is Chaining in jQuery?
142 What are selectors in jQuery and how many types of selectors are there?
143 What is the difference between $('div') and $('<div/>') in jQuery?
144 How to disable jQuery animation?
145 Explain .bind() vs .live() vs .delegate() vs .on()?
146 What is event.PreventDefault?
147 How to write browser specific code using jQuery?
148 What are various methods to make ajax request in jQuery?
149 Can we execute/run multiple Ajax request simultaneously in jQuery? If yes, then how?
150 What are the various ajax functions?
151 What is jQuery.holdReady() function?
152 How do you stop the currently-running animation?
153 Can we use jQuery to make ajax request?
154 How can images be made to appear scrolling one over another?
155 What is the advantage of using protocol less URL while referencing jQuery from CDNs?
156 How to set attributes of an element using jQuery?
157 Is there any difference between body onload() and document.ready() function?
158 What is the difference between parent() and parents() methods in jQuery?
159 What is difference between prop and attr?
160 You get "jquery is not defined" or "$ is not defined" error. What could be the reason?
161 What are source maps in jQuery?
162 Consider a scenario where things can be done easily with javascript, would you still prefer jQuery?
163 What are the guidelines for an application to follow the principles of progressive enhancement?
164 How can an element be checked if it contains a specific class?
165 How does jquery store data related to an element?
166 How can events be prevented to work after an ajax request?
167 Is there any advantage of using $.ajax() for ajax call against $.get() or $.post()?
168 What are the approaches of extracting a query string with regular expressions?
169 What is the difference between calling stop(true,true) and finish method?
170 Is it possible to get value of multiple CSS properties in single statement?
171 Why is the block display style used for animations?
172 Does jQuery 2.0 supports IE?
173 Can we include multiple version of jQuery? If yes, then how they are executed?
174 What is the difference between jquery.size() and jquery.length?
175 What does $("div") will select?
176 How to get the width of an element using jQuery?
177 What is jQuery plugin and what is the advantage of using plugin?
178 What is the difference between event.PreventDefault and "return false"?
179 Is jQuery a library for client scripting or server scripting?
180 How to stop the rest of the event handlers from being executed in jQuery?
181 What are the fastest selectors in jQuery?
182 What is the difference between eq() and get() methods in jQuery?
183 What is finish method in jQuery?
184 Is jQuery replacement of Java Script?
185 What are deferred and promise object in jQuery?
186 How to prevents the browser from executing the default action using jQuery?
187 How to select element having a particular class (".selected")?
188 How to set the html contents of an element using jQuery?
189 How to check data type of any variable in jQuery?
190 How to add the previous selection to the current selection using jQuery?
191 What are the slow selectors in jQuery?
192 How to get the direct parent of an element using jQuery?
193 What is the difference between .js and .min.js?
194 How to get the style property of an element using jQuery?
195 Which is the starting point of code execution in jQuery?
196 How to set the style property of an element using jQuery?
197 What are jQuery Selectors? Give some examples?
198 How to remove set of matched elements using jQuery?
199 How to get the height of an element using jQuery?
200 Explain the common methods of sending a request to a server?
201 Create a plugin that would add and remove a class on hover?

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