Any good resource for java interview questions

There are many sites which are good resource for java interview questions-answers. Following is the list of most popular websites.

• Tutorialspoint www.tutorialspoint.com
• StackOverflow www.stackoverflow.com
• DZone www.dzone.com
• Wikipedia www.wikipedia.org
• IBM Developer Works www.ibm.com/developerworks/java/
• TechGig www.techgig.com
• GitHub www.github.com
• Java documentation docs.oracle.com/javase/
• Coursera www.coursera.org/
• JavaWorld www.javaworld.com/