Purba, W. , Rukmana, D. , Br.sitanggang, D.R. and Harefa, L.S. 2021. Impact of Online Learning in the Era Pandemic Using the Algorithm C 4.5 . Journal of Computer Networks, Architecture and High Performance Computing. 3, 2 (Jul. 2021), 144-152. DOI:https://doi.org/10.47709/cnahpc.v3i2.990.