91. | Which of the following is true concerning the following statement: class Manager extends Employee |
Discuss |
Answer: (b).Manager is a concrete class and a subclass.
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92. | The reserved word enum is used for which of the following? |
Discuss |
Answer: (a).To define a range for an attribute.
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93. | ODL supports which of the following types of association relationships? |
Discuss |
Answer: (b).Unary and Binary
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95. | The keyword "inverse" is used in which of the following? |
Discuss |
Answer: (c).Relationship
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96. | An extent is which of the following? |
Discuss |
Answer: (c).The set of all instances of a class within a database
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97. | Which of the following is true concerning an ODBMS? |
Discuss |
Answer: (d).Both a and c
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98. | Which of the following is not a logical data-base structure? |
Discuss |
Answer: (d).chain
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99. | The relational model uses some unfamiliar terminology. A tuple is equivalent to a: |
Discuss |
Answer: (a).record
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100. | A top-to-bottom relationship among the items in a database is established by a |
Discuss |
Answer: (a).Hierarchical schema
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