Liferay Interview quesitions

1.    What do you mean by portal instances?

2.    Diff b/w personalization and customization?

3.    Diff b/w Authentication and Authorization?

4.    When you use ext plugin give few examples?

5.    Can liferay struts actions are overridden by the hook?

6.    Can we override all portal.properties file?

7.    How can we read the portal properties file in liferay?

8.    How can we do LDAP integration with Liferay?

9.    How liferay authenticate the user when its credential is present in both database as well as LDAP?

10.  What is internationalization? How it is achieved using liferay?

11.  What is site and community and organization in liferay?

12.  What is the difference between HttpServletRequest and RenderRequest?

13.  What are the different modes of portlet?

14.  What is WSRP?

15.  How to create indexes in liferay?

16.  What are 'users' and 'Users Group' in liferay?

17.  How to create SpringMVC portlet in liferay?

18.  How to customize liferay services?

19.  Can an organization have multiple site?

20.  Can a site be accesses by multiple organization?

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

22.  Community Vs Site in Liferay?

23.  How you'll upgrade 6.0.6 to .6.2 version of liferay?

24.  What is the difference between RenderRequest and ActionRequest?

25.  When a request is made in liferay, what are the attributes or param are visible in the URL?

26.  Why the core jsp files are not modified instead of creating custom jsp using hook?

27.  What is PortletRequest?

28.  What are the parameters present in a PortletRequest?