This is an useful site: http://www.google.com
It is really like magic; you just enters your question in and it will return a list of liks which can contain the answers or at least the related information.
Here are some shortcuts using your own questions:
http://www.google.com/search?q=what+is+a+java+heap?
http://www.google.com/search?q=what+is+a+saveabend+file?
http://www.google.com/search?q=what+is+singal+11+error?
Bookmark this site.