80 jQuery interview questions and answers


shreelimbkar

80jQuery

Below is the list of latest and updated jQuery interview questions and their answers for freshers as well as experienced users. These interview question covers latest version of jQuery which is jQuery 2.0. These interview questions will help you to prepare for the interviews, for quick revision and provide strength to your technical skills.

Q1. What is jQuery?
Ans: jQuery is fast, lightweight and feature-rich client side JavaScript Library/Framework which helps in to traverse HTML DOM, make animations, add Ajax interaction, manipulate the page content, change the style and provide cool UI effect. It is one of the most popular client side library and as per a survey it runs on every second website.

Q2. Why do we use jQuery?
Ans: Due to following advantages.

  • Easy to use and learn.
  • Easily expandable.
  • Cross-browser support (IE 6.0+, FF 1.5+, Safari 2.0+, Opera 9.0+)
  • Easy to use for DOM manipulation and traversal.

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PHP Interview Questions and Answers


1. What’s PHP ?

The PHP Hypertext Preprocessor is a programming language that allows web developers to create dynamic content that interacts with databases. PHP is basically used for developing web based software applications.

2. How can we know the number of days between two given dates using PHP?

$date1 = date(‘Y-m-d’);
$date2 = ‘2006-07-01’;
$days = (strtotime($date1) – strtotime($date2)) / (60 * 60 * 24);
echo “Number of days since ‘2006-07-01’: $days”;

3. How do you define a constant?

define (“MYCONSTANT”, 100);

4. What is meant by urlencode and urldecode?

urlencode() returns the URL encoded version of the given string. URL coding converts special characters into % signs followed by two hex digits.
For example:
urlencode(“10.00%”) will return “10%2E00%25”. URL encoded strings are safe to be used as part of URLs.
urldecode() returns the URL decoded version of the given string. Continue reading