Academic dishonesty is a universal problem. The educational community across the world is facing the increasing problem of plagiarism. This widespread problem has motivated the need of an efficient, robust and fast detection procedure that is difficult to be achieved manually. Detecting duplicated text among natural language artifacts is a well-documented task. However, performing similar analysis on source code presents unique problems. Source-code plagiarism detection in programming, concerns the identification of source-code files that contain similar and/or identical source-code fragments. In this paper, a brief discussion of source code Plagiarism is presented as well as comparative study of the application of various techniques in textual similarity processing on source code.