Multiple choice technology mainframe For KSDS or RRDS , when DELETE statement is used, the file must be opened in I-O Mode. True False Reveal answer Fill a bubble to check yourself A Correct answer Explanation VSAM files (KSDS, RRDS) must be opened in I-O mode for DELETE operations because I-O mode allows both reading and writing operations. This mode is required to locate and then remove records from the dataset.