Cignex interview in liferay

1.what is the main difference b/w hooks and exts?

2.when to go for  exts and hooks and y?

3)Diff b/w 6.0.6 and latest version?

4)Can we override portal.properties using hook?

5.which one is preferred one when I am going change 4 functionality of portal like Ext or Hook?

6.which one preferred one for writing one finder method in userlocal services like Ext or Hook?

7.How to integreate portlets in themes?

8.How to integrate portlets in layouts?

9.How to integrate LDAP in liferay?

10.Have you write any build scripts like maven and ANT?

11.Have you created any webservices?

12.Have you worked on any json webservices?

13.what is purpose of portlet.vm file in themes?

14.How many types of hooks are available in liferay?

15.Have you done portal performance tunup test?

16.Is there any specific reason to use liferay MVC instead of spring mVC.(If your using liferay MVC)

17.Diff b/w portlet session and http session?

18.What is the purpose of portal-ext.properties?

19.what is uuid column in user table?
20.What is the use of "datasource" attribute for entity in service.xml?

  1>Diff Between Hook And Ext?
2>what are the types of hooks?
3>mention the types of plugins in liferay?
4>explain service builder?
5>what is web content?
6>How to increase the size of column in liferay?
7>what are the possible DataTypes in Liferay?
8>How can you store image in Liferay Technology?
9>How To Embed One Portlet In another Portlet?
10>What is Liferay?
11>Diff Between 286 and 168 JSR Complaint?
12>What are users and usergroups?
13>explain IPC?
14>diff between dynamic query and custom query>
15>diff between liferay and other frameworks?
16>portal instance in liferay?
17>how to add portlet in control panel?