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| Q. |
Why do magnetic tape drives for minicomputers use vacuum columns? |
| A. | For quick acceleration and deacceleration of the tape |
| B. | For immediate starting and stopping of the tape |
| C. | To avoid stress in the tape |
| D. | To provide extra tape length |
| E. | None of these |
| Answer» C. To avoid stress in the tape | |
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