JQuery Interview Questions and Answers, JQuery Interview Questions and Answers Freshers, JQuery Interview Questions and Answers, JQuery Interview Questions

Before getting on to the JQuery interview questions, the student must know that the JQuery is a continuously varying field which needs the students as well as professionals to upgrade their skills with the new features and knowledge, to get fit for the jobs associated. This post related to JQuery Interview Questions and Answers, JQuery Interview Questions and Answers Freshers, JQuery Interview Questions and Answers, JQuery Interview Questions will help you let out find all the solutions that are frequently asked in you upcoming JQuery interview.

Over thousands of vacancies available for the JQuery developers, experts must be acquaintance with all the component of JQuery technologies. This is necessary for the students in order to have in-depth knowledge of the subject so that they can have best employment opportunities in the future. Knowing every little detail about JQuery is the best approach to solve the problems linked with problem.

APTRON has spent hours and hours in researching about the JQuery Interview Questions and Answers, JQuery Interview Questions and Answers Freshers, JQuery Interview Questions and Answers, JQuery Interview Questions that you might encounter in your upcoming interview. This post related to JQuery interview questions and answers will help you let out find all the solutions that are frequently asked in you upcoming JQuery interview. All these questions will alone help you to crack the interview and make you the best among all your competitors.

First of all, let us tell you about how the JQuery technology is evolving in today’s world and how demanding it is in the upcoming years. In fact, according to one study, most of the companies and businesses have moved to the JQuery. Now, you cannot predict how huge the future is going to be for the people experienced in the related technologies.

Hence, if you are looking for boosting up your profile and securing your future, JQuery will help you in reaching the zenith of your career. Apart from this, you would also have a lot of opportunities as a fresher.

These questions alone are omnipotent. Read and re-read the questions and their solutions to get accustomed to what you will be asked in the interview. These JQuery interview questions and answers will also help you on your way to mastering the skills and will take you to the giant world where worldwide and local businesses, huge or medium, are picking up the best and quality JQuery professionals.

This ultimate list of best JQuery interview questions will ride you through the quick knowledge of the subject and topics like UI Components, Buttons, Lists, Forms. This JQuery interview questions and answers can be your next gateway to your next job as a JQuery expert.

These are very Basic JQuery Interview Questions and Answers for freshers and experienced both.

Q1: What is JQuery?
A1: JQuery is a cross-browser lightweight JavaScript library. In simple words jQuery has been designed to make navigation to any element easier, or adding/invoking event handlers on your HTML page and also simplify the way you access the elements in your web pages, provide help in working with client-side events, enable visual effects like animation, and make it easier to use Ajax in your applications.

A quick look at what is available in jQuery:

  • Cross-browser support and detection.
  • AJAX functions
  • CSS functions
  • DOM manipulation
  • DOM transversal
  • Attribute manipulation
  • Event detection and handling.
  • JavaScript animation
  • Hundreds of plugins for pre-built user interfaces, advanced animations, form validation, etc.
  • Expandable functionality using custom plugins.

Q2: What is JQuery.noConflict?
A2: jQuery no-conflict is an option given by jQuery to overcome the conflicts between the different js frameworks or libraries. When we use jQuery no-conflict mode, we are replacing the $ to a new variable and assigning to jQuery some other JavaScript libraries. Also use the $ (Which is the default reference of jQuery) as a function or variable name what jQuery has. And in our development life, we are not at all strict to only jQuery.

Q3: What is jQuery UI?
A3: jQuery UI enable our applications to have a cool user interface and animation in a faster way. It is the set of plug-ins that include interface interactions, effects, animations, widgets and themes built on the JavaScript Library. jQuery is used to create cohesive and consistent APIs. It is a method that we can use to extend jQuery prototype objects. By that prototype object you can enable all jQuery objects to inherit any method that you add.

Interactions

We can use interactions for basic mouse-based behaviours to any element. Examples of Interactions are the following:

  • Draggable
  • Droppable
  • Resizable
  • Selectable
  • Sortable

Q4: What are the methods used to provide effects?
A4: jQuery provides many amazing effects, we can apply these effects quickly and with simple configuration. The effect may be hiding, showing, toggling, fadeout, fadein, fadeto and so on toggle(), Show() and hide() methods. Similarly we can use other methods as in the following:

  • animate( params, [duration, easing, callback] ) This function makes custom animations for your HTML elements.
  • fadeIn( speed, [callback] ) This function fades in all the matched elements by adjusting their opacity and firing an optional callback after completion.
  • fadeOut( speed, [callback] ) This function is used to fade out all the matched elements by adjusting their opacity to 0, then setting the display to “none” and firing an optional callback after completion.
  • fadeTo( speed, opacity, callback ) This function fade the opacity of all the matched elements to a specified opacity and firing an optional callback after completion.
  • stop( [clearQueue, gotoEnd ]) This function stops all the currently running animations.

Q5: What is jQuery?
A5: 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.

Q6: Why jQuery is needed?
A6: 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

Q7: Whether jQuery HTML work for both HTML and XML documents?
A7: No, jQuery HTML only works for HTML documents not for XML Documents.

Q8: What are the methods used to provide effects?
A8: Some of the effects methods are:

  • Show()
  • Hide()
  • Toggle()
  • FadeIn() and
  • FadeOut()

Q9: Is jQuery is a JavaScript or JSON library file?
A9: 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.

Q10: Which operating system is more compatible with jQuery?
A10: Mac, Windows and Linux are more compatible with the jQuery.

Q11: How can we include jQuery library in ASP.Net project?
A11: Download the jQuery library from jQuery.com and include that reference in the asp.net page.

Q12: Which command will give a version of jQuery?
A12: The command $.ui.version returns jQuery UI version.

Q13: What is jQuery connect?
A13: 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.

Q14: How to use connect?
A14: 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.

Q15: What are the features of jQuery, has been used in web applications?
A15: jQuery uses features like Sliding, File uploading and accordian in web applications.

Q16: What are the browser related issues for jQuery?
A16: Browser compatibility of jQuery plugin is an issue and needs lot of time to fix it.

Q17: Whether we need to add jQuery file in both Master and Content page?
A17: jQuery file should be added to the Master page and can use access from the content page directly without having any reference to it.

Q18: What is the difference between .js and .min.js?
A18: jQuery library comes in 2 different versions Development and Production/Deployment. The deployment version is also known as minified version. So .min.js is basically the minified version of jQuery library file. Both the files are same as far as functionality is concerned. but .min.js is quite small in size so it loads quickly and saves bandwidth.

Q19: Why there are two different version of jQuery library?
A19: jQuery library comes in 2 different versions.

  1. Development
  2. Production/Deployment

The development version is quite useful at development time as jQuery is open source and if you want to change something then you can make those changes in development version. But the deployment version is minified version or compressed version so it is impossible to make changes in it. Because it is compressed, so its size is very less than the production version which affects the page load time.

Q20: What is a CDN?
A21: A content delivery network or content distribution network (CDN) is a large distributed system of servers deployed in multiple data centers across the Internet. The goal of a CDN is to serve content to end-users with high availability and high performance.

Q21: Which are the popular jQuery CDN? and what is the advantage of using CDN?
A21: There are 3 popular jQuery CDNs.

  1. Google
  2. Microsoft
  3. jQuery

Advantage of using CDN.

  • It reduces the load from your server.
  • It saves bandwidth. jQuery framework will load faster from these CDN.
  • The most important benefit is it will be cached, if the user has visited any site which is using jQuery framework from any of these CDN

Q22: What does $(“div.parent”) will select?
A22: All the div element with parent class.

Q23: What are the fastest selectors in jQuery?
A23: ID and element selectors are the fastest selectors in jQuery.

Q24: What are the slow selectors in jQuery?
A24: class selectors are the slow compare to ID and element.

Q25: How to revert the most recent ‘destructive’ operation, changing the set of matched elements to its previous state using jQuery?
A25: The end( ) method reverts the most recent ‘destructive’ operation, changing the set of matched elements to its previous state.

Q26: How to search for descendant elements that match the specified selectors using jQuery?
A26: The find( selector ) method searches for descendent elements that match the specified selectors.

Q27: How to find all sibling elements after the current element using jQuery?
A27: The nextAll( [selector] ) finds all sibling elements after the current element.

Q28: How to get the direct parent of an element using jQuery?
A28: The parent( [selector] ) method gets the direct parent of an element. If called on a set of elements, parent returns a set of their unique direct parent elements.

Q29: How to find all sibling elements in front of the current element using jQuery?
A29: The prevAll( [selector] ) method finds all sibling elements in front of the current element.

Q30: How to get the style property of an element using jQuery?
A30: The css( name ) method returns a style property on the first matched element.

Q31: How to get the current offset of the first matched element, in pixels, relative to the document using jQuery?
A31: The offset( ) method gets the current offset of the first matched element, in pixels, relative to the document.

Q32: How to add and remove CSS classes to an element using jQuery?
A32: You can use addclass() jQuery method to add CSS class to an element and removeclass() jQuery method to remove CSS class from an element.

Q33: Can you write a jQuery code to select all links inside the paragraph?
A33: Yes. You can use <a> tag nested inside paragraph <p> tag to select all links.

Q34: What is the difference between prop and attr?
A34: attr(): It gets the value of an attribute for the first element in the set of matched element.

prop(): it gets the value of a property for the first element in the set of matched elements. It is introduced in jQuery 1.6.

JQuery Conclusion Interview FAQs

We know the list of JQuery Interview Questions and Answers, JQuery Interview Questions and Answers Freshers, JQuery Interview Questions and Answers, JQuery Interview Questions is overwhelming but the advantages of reading all the questions will maximize your potential and help you crack the interview. The surprising fact is that this JQuery interview questions and answers post covers all the basic of the JQuery technology and you have to check out the FAQs of different components of JQuery too.

However, you will be asked with the questions in the interview related to the above mentioned questions. Preparing and understanding all the concept of JQuery technology will help you strengthen the other little information around the topic.

After preparing these interview questions, we recommend you to go for a mock interview before facing the real one. You can take the help of your friend or a JQuery expert to find the loop holes in your skills and knowledge. Moreover, this will also allow you in practicing and improving the communication skill which plays a vital role in getting placed and grabbing high salaries.

Remember, in the interview, the company or the business or you can say the examiner often checks your basic knowledge of the subject. If your basics is covered and strengthened, you can have the job of your dream. The industry experts understand that if the foundation of the student is already made up, it is easy for the company to educate the employ towards advance skills. If there are no basics, there is no meaning of having learnt the subject.

Therefore, it’s never too late to edge all the basics of any technology. If you think that you’ve not acquired the enough skills, you can join our upcoming batch of JQuery Training in Noida. We are one of the best institute for JQuery in noida which provide advance learning in the field of JQuery Course. We’ve highly qualified professionals working with us and promise top quality education to the students.

We hope that you enjoyed reading JQuery Interview Questions and Answers, JQuery Interview Questions and Answers Freshers, JQuery Interview Questions and Answers, JQuery Interview Questions and all the FAQs associated with the interview. Do not forget to revise all the JQuery interview questions and answers before going for the JQuery interview. In addition to this, if you’ve any doubt or query associated with JQuery , you can contact us anytime. We will be happy to help you out at our earliest convenience. At last, we wish you all the best for your upcoming interview on JQuery Technology.

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