In this situation explain how different data records

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Unformatted text preview: access storage device? Give examples of a few applications for which such a storage device is suitable. 7. What is a random-access storage device? Give examples of a few applications for which such a storage device is suitable. 8. Distinguish between a sequential access, a direct access, and a random access storage device. Give one example of each. 9. "The storage approach selected for a particular application is determined by the way the data are organized and processed." Discuss. 10. Differentiate between on-line and off-line storage of data. Name a storage device suitable for each type of data storage. 11. Explain how information js recorded on a magnetic tape. 12. What is a parity bit? How is it used for detecting errors? 13. What is a magnetic tape drive? Describe the main components and the basic operation mechanism of a half-inch magnetic tape reel drive. 14. Define "data recording density" and "data transfer rate" for a magnetic tape drive. What is the data transfer rate for a magnetic tape system for which the tape density is 800 BPI and the tape speed is 200 inches per second? 15. A magnetic tape is a continuous medium in which data are recorded serially and there is no addressing mechanism. In this situation, explain how different data records stored on a magnetic tape are identified. 16. In the context of magnetic tape storage, what is an inter-record gap? Why is it needed? 17. In the context of magnetic tape storage, what is an inter-block gap? Why is it needed? 18. In the context of magnetic tape, what is blocking? Explain how blocking helps in faster tape I/O operation. 19. In the context of magnetic tape storage, what is blocking factor? How is blocking factor generally decided' 20. The tape usage increases as the blocking factor increases. Give an example to illustrate this. 21. The tape usage increases as the blocking factor increases. This means that the blocking factor should be i large as possible. What is the problem in making...
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This document was uploaded on 04/07/2014.

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