updated text of shadow dom

Author: khan4019

css.html

@@ -289,7 +289,7 @@ <h2>13. pre processor</h2>
 <div id="standard_quirks">
   <h2>14. shadow DOM</h2>
   <p><strong>Question:</strong> What is shadow DOM?</p>
-  <p><strong>Answer:</strong> encapsulate part of a DOM. hide subtree.</p>
+  <p><strong>Answer:</strong> encapsulate part of a DOM. hide subtree. you can have same ID in different shadow DOM. Polymers uses it. This way your DOM becomes reusable and u dont have to do iframe. if interviewer is not happy with your answer give him the links and tell him to spend a weekend on reading.</p>
   <p>ref: <a href="http://www.w3.org/TR/shadow-dom/#introduction">W3: shadow-DOM</a>, <a href="http://www.html5rocks.com/en/tutorials/webcomponents/shadowdom/">html5rock: shadow DOM</a></p> 
 </div>
 <!-- <div id="semantic_html">
@@ -303,7 +303,7 @@ <h2>15. semantic</h2>
 
 <h2>temporary list of questions</h2>
 <ul>  
-  <li>explain shadow DOM</li>
+  <li>transition 3D</li>
   <li>text effect in css3</li>  
   <li>reset css</li>  
   <li>what is filter? why would u use it?</li>