21. | Row is synonymous with the term: |
Answer: (a).record
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22. | The primary key is selected from the: |
Answer: (c).candidate keys
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23. | Which of the following is a group of one or more attributes that uniquely identifies a row? |
Answer: (a).Key
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24. | A relation is considered a: |
Answer: (c).two-dimensional table
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25. | In the relational model, relationships between relations or tables are created by using: |
Answer: (d).foreign keys
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26. | Table is synonymous with the term: |
Answer: (b).relation
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27. | Which of the following is not a restriction for a table to be a relation? |
Answer: (c).The columns must be ordered.
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28. | A key: |
Answer: (c).identifies a row.
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29. | An attribute is a(n): |
Answer: (a).column of a table.
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30. | A tuple is a(n): |
Answer: (c).row of a table.
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