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JavaScript/JQuery Interview Questions: In this section, we will see the questions related to the scripting languags like JavaScript and the libraries JQuery, various javascript inbuilt classes, methods andproperties, commonly used functions, JQuery libraries and its use in the applications, some common JQuery functions which can be used in the application in simple ways, somecode snippets etc
JavaScript Questions
1.What is JavaScript?
2.What are JavaScript types?
3.Enumerate the differences between Java and JavaScript?
4.What is the use of isNaN function?
5.Between JavaScript and an ASP script, which is faster?
6.What is negative infinity?
7.Is it possible to break JavaScript Code into several lines?
8.Which company developed JavaScript?
9.What are undeclared and undefined variables?
10.Write the code for adding new elements dynamically?
11.What are global variables? How are these variable declared and what are the problems associated with using them?
12.What is a prompt box?
13.What is ‘this’ keyword in JavaScript?
14.Explain the working of timers in JavaScript? Also elucidate the drawbacks of using the timer, if any?
15.Which symbol is used for comments in Javascript?
16.What is the difference between ViewState and SessionState?
17.What is===operator?
18.Explain how can you submit a form using JavaScript?
19.Does JavaScript support automatic type conversion?
20.How can the style/class of an element be changed?
21.Explain how to read and write a file using JavaScript?
22.What are all the looping structures in JavaScript?
23.What is called Variable typing in Javascript?
24.How can you convert the string of any base to integer in JavaScript?
25.Explain the difference between “==” and “===”?
26.What do mean by NULL in Javascript?
27.What is the function of delete operator?
28.What is an undefined value in JavaScript?
29.What are all the types of Pop up boxes available in JavaScript?
30.What is the use of Void(\(\(0)?
JQuery Questions
1.What is jQuery?
2.Why jQuery is needed?
3.Whether jQuery HTML work for both HTML and XML documents?
4.What are the methods used to provide effects?
5.What is the advantage of using minimized version of jQuery?
6.Is jQuery is a JavaScript or JSON library file?
7.Which operating system is more compatible with jQuery?
8.How can we include jQuery library in ASP.Net project?
9.Which command will give a version of jQuery?
10.In what scenarios jQuery can be used?
11.What is the difference between find and children methods?
12.What is jQuery connect?
13.How to use connect?
14.What are the features of jQuery, has been used in web applications?
15.What are the browser related issues for jQuery?
16.Whether we need to add jQuery file in both Master and Content page?
17.What are the basic selectors in jQuery?
18.Can we call C# code behind using jQuery?
19.What is the use jQuery.data method?
20.What is the use of each function in jQuery?
21.What is the difference between size and length of jQuery?
22.Can we add more than one ‘document.ready’ function in a page?
23.What is the use of jQuery load method?
24.Whether our own specific characters are used in place of $ in jQuery?
25.What are the four parameters used for jQuery Ajax method?
26.What is the use of jQuery filter?
27.Which program is useful for testing jQuery?
28.Which sign is used as a shortcut for jQuery?
29.Is jQuery is a client or server scripting?
30.What is the script build up by jQuery?