Answer / pradosh

cmmand task:use the cmmand to perform the task i.e copy
copy\D: file1 E;\file1
that means after the execution of cmd task ,it takes copy (back up)

Control task:it is used for stop,abrot and fail the top level wf.(cntrol the data flow)
ex:fail parent
i.e after Execution of control task ,parent wf fail

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