Disk Operating System (DOS) Question: Which is not a system tool? a. Folder b. Backup c. Scandisk d. Format DOS (Disk Operating System) Interview QuestionAnswer: a. Folder Previous QuestionNext QuestionTo properly exit Windows: a. Click the stop button on the desktop b. Click the exit button on the desktop c. Select shut down from Start menu d. None of aboveA utility that can be used to minimize the number of fragmented files and enhance the speed: a. Disk space b. Defrag c. Scandisk d. Double space