The form of programming applications based on C ++ and C # lies in the design of portfolio-based assessment that is more functional and has high flexibility in terms of developing programming directions. The objectives of this study are (1) measuring infrastructure readiness from authentic use digital database -based assessment, (2) measuring software availability and (3) measuring the availability of spare parts for hardware in the implementation of authentic digital based assessment. The

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... d used is big data analysis from various website. The results of this study (1) the application of authentic assessment digitally based, would be implemented if use storage portfolio, (2) for portfolio analysis can use fuzzy logic combined with the programming language C ++ and (3) the use of analytics to the data analysis of the pattern in the portfolio can be used for error analysis in formal grammar. It is suggested to policymakers to redesign the use of fuzzy logic in analytic design for data pattern analysis in student portfolios. The C # based application development for learning management system scoring is part of developing creative writing skills.