16. True or false: C++ uses a special descriptor for string length O True O False 17. Decimal data types O Exist because floating points cannot exactly store decimals O Use more memory than floats O Are supported by COBOL and C# O All of the above 18. Fixed heap-dynamic binding of arrays: Storage binding is dynamic but fixed after allocation of memory from the heap O Subscript ranges are statically bound and storage allocation is done before run-time Storage binding is dynamic but fixed after allocation of memory from the stack O None of the above 19. Consider this C++ code: imt x15; void foo( int& i) i 5 foo(x) The value of x would now be: 0 5 O 15 O A memory address O None of the above