Question

meaningful identify useful

Answer 1

Meaningful identifiers means the names of variables, programs, file names, picture names function and procedure names , class names and object names.

   These names are all given in such a way that one understands the program  easily.  While writing the program also,  the developer finds it much more comfortable using meaningful identifiers.

for example:  if there is an array , list, matrix  that are used for employee data, then that can be named

Answer 2

to get some useful.....

Another meaning
1 : capable of being put to use especially : serviceable for an end or purpose..

Hope it's helpful