Array Rotation

http://www.geeksforgeeks.org/array-rotation/

Object Reflection Java

http://stackoverflow.com/questions/37628/what-is-reflection-and-why-is-it-useful

Nosql

https://www.youtube.com/watch?v=qI_g07C_Q5I

Spring Framework

Spring Security

http://www.studytrails.com/frameworks/spring/spring-security-custom-login-page.jsp

Tomcat 7 Enabling HTTPS

https://tomcat.apache.org/tomcat-7.0-doc/ssl-howto.html

HTTPS POST CALL WITH BASIC AUTHORIZATION AND BYPASSING CERTIFICATE SIGNING

Permuation String

Multithreading

http://www.javacodegeeks.com/2014/11/multithreading-concurrency-interview-questions-answers.html