This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
thanks! 1.Given that file is a reference to a File object that represents a directory, which code fragments will succeed in obtaining a list of the entries in the directory? A]Vector filelist = ((Directory)file).getList(); B]String  filelist = file.directory(); C]Enumeration filelist = file.contents(); D]String filelist = file.list(); E]Vecor filelist= (new Directory(file)).files(); 2.Which of these statements concerning the collection interfaces are true? A]Set extends collection B]All methods defined in set are also defined in collection C]List extends collection D]All methods defined in list are also defined in collection E]Map extends collection
3.Given two collection objects referenced by col1 and col2, which of these statements are true? A]The operation col1.retainAll(col2) will not modify col1 object B]Col1.removeAll(col2) will not modify col2 C]Col1.addAll(col2) will return a new collection object, containing elements from both Col1 and col2 D]Col1.containsAll(col2) will not modify the col1 object