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36. In which file records are stored one after another in an ascending or descending order determined by the key field of the records?
direct files
sequential files
both (A) & (B)
None of these
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37. The amount of a certain product sold to a certain customer in a past period can be obtained from the:
Customer file
Sales history file
Inventory file
All of the above
38. Partial correlation is a type of
Simple correlation
Multiple correlations
Both (A) and (B)
39. When variations in the values of two variables have a constant ratio, there will be
Linear correlation
Non-linear correlation
Zero correlation
None of the above
40. The advantages of sequential files are
Easy to organize, maintain and understand
There is no overhead in address generation. Locating in a particular record requires only the specification of the key field
Relatively inexpensive I/O media and devices can be used for the storage and processing of such files.
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