Answer from cs61c-cd (Charles Leung 15905350) for Question 3
In Java there is no need for a free function.  Once some memory is no longer being used, it is automatically cleaned up and freed.  The Java equivalent to malloc is new.  C kind of has an automatic allocation/deallocation system that frees the memory when a function exits.  I think it was called alloca?  Because of differences in memory layouts and C implementations it is hard for C to have auto alloc and frees.