zero byte with String

My program would be creating a file, incase of non data from database it would only able to produce 'END, logically it would be file created by oracle in unix.

this file is showing zero byte but actully there are 4 char in file.This is not required, therefore what is command line should be written so that if the string matches then rm the file fromn location.

i have executed the commond based of zero byte but no luck.