JSP

http://javarevisited.blogspot.in/2011/10/jsp-interview-questions-answers-for.html

http://www.journaldev.com/1162/java-multi-threading-concurrency-interview-questions-with-answers#thread-join
http://javarevisited.blogspot.in/2013/01/difference-between-identityhashmap-and-hashmap-java.html