Regarding recursion, if a base case is never reached the result is:

The ____________ fstream member function closes a file stream. Explain why it is best to close a file when the program is through processing the data in the file.

a) close( ) b) overloaded operator <<( ) c) open( ) d) eof( ) e) flush( )

Which of the following is not an abstract implementation provided by the collections framework?

a. AbstractCollection. b. AbstractTree. c. AbstractMap. d. AbstractList.