DBMS-Physical Data Organization

DBMS-Physical Data Organization
31. In hashing, the record key is processed mathematically.
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32. The file storage organisation determines how to access the record.
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33. Files could be made of fixed-length records or variable-length records.
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34. A file in which all the records are of the same length are said to contain fixed-length-records.
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35. Because tapes are slow, they are generally used only for long-term storage and backup.
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36. There are many types of magnetic disks such as hard disks, flexible disks, zip disks and jaz disks.
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37. Data transfer time is the time it takes to transfer the data to the primary storage.
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38. Optical storage is low-speed direct access storage device.
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39. In magnetic tape, the read/write head reads magnetized areas (which represent data on the tape), converts them into electrical signals and sends them to main memory and CPU for execution or further processing.
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40. In a bit-level stripping, splitting of bits of each is done across multiple disks.
  • TRUE
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