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MCQs

Total Questions : 61 | Page 3 of 7 pages
Question 21. The degree of a relationship refers to the number of entity classes in the relationship.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 22. Entities use identifiers while tables use keys.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 23. Composite identifiers consist of two or more attributes.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 24. When designing a database, first identify the entities, then determine the attributes, and finally establish the relationships.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 25. A subtype entity is a special case of another entity called a supertype entity.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 26. An entity is something that can be identified in the user's work environment; something that the users want to track.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 27. Entity instances are associated by relationship classes.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 28. 1:1, 1:N and N:M relationships are also known as HAS-A relationships.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 29. In a 1:N relationship, the parent is the entity on the one side of the relationship and the child is the entity on the N side of the relationship.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 30. A maximum cardinality is the maximum number of entity instances that can participate in a relationship instance.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True

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