Database Systems - Section 7 Multiple Questions and Answers.
Exercise Questions ::
Database Systems
36. | A logical schema |
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| A. | is the entire database |
| B. | is a standard way of organizing information into accessible parts |
| C. | describes how data is actually stored on disk |
| D. | All of the above |
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Published by:Michael Daani
Published by:Michael Daani
38. | In order to use a record management system |
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| A. | You need to understand the low-level details of how information in stored |
| B. | You need to understand the model the record management system uses. |
| C. | Both (a) and (b) |
| D. | All of the above |
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Published by:Michael Daani
39. | In SQL, which command is used to select only one copy of each set of duplicable rows |
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| A. | SELECT DISTINCT |
| B. | SELECT UNIQUE |
| C. | SELECT DIFFERENT |
| D. | All of the above |
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Published by:Michael Daani
40. | The physical location of a record is determined by a mathematical formula that transforms a file key into a record location in |
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| A. | a tree file |
| B. | an indexed file |
| C. | a hashed file |
| D. | a sequential file |
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Published by:Michael Daani
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