what is sql injection and how do you avoid that?
==>SQL Injection is one of the many web attack mechanisms used by hackers to steal data from organizations. 

how you implement cross side scriting (xss).?
==>In general, cross-site scripting refers to that hacking technique that leverages vulnerabilities in the code of a web	   application to allow an attacker to send malicious content from an end-user and collect some type of data from the       victim. 

security checking for third party servcies to avoid malfunctioning.?
How do you decide your SQL query for better performance.?
On what basis SQL query performance calculated on local DB and on server DB.?

what is addslashes?
==>The addslashes() function returns a string with backslashes in front of predefined characters.
	The predefined characters are:
		single quote (')
		double quote (")
		backslash (\)
		NULL

what is htmlentities.?

What is data sanitization.
any big achievement you done in project
performance monitoring tools.
Which are frameworks you used in development.
Any CMS used for development.
what do you specially develope in Joomla (components, modules, plugins)
what is K2 in joomla.
How to change ini settings run time.
What is Scrum metting and what is use of that?
How do you attain scrum.
mysql vs mariadb.
diff cache technique and there use.
left join and inner join which  is most useful.
where clause with like what is server performance.
mysql query optimization.