Tutorials helpful for IT Jobs

Software Testing :

http://en.wikipedia.org/wiki/Portal:Software_Testing

http://www.stellman-greene.com/aspm/images/ch03.pdf

http://www.stellman-greene.com/aspm/content/view/39/41/
http://www.exforsys.com/tutorials/testing.html
http://www.exforsys.com/tutorials/testing.html
http://www.developer.com/mgmt/article.php/1463281
http://blog.nasscom.in/emerge/2009/08/software-estimation-best-practices-tools-techniques/

 dbXML :- XML database

http://www.xml-training-guide.com/dbxml.html

SQL

Conceptual Understanding

http://www.w3schools.com/sql/default.asp

http://www.sqlcourse.com/index.html

Practical

http://sqlzoo.net/