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MCQs

Total Questions : 262 | Page 26 of 27 pages
Question 251. An entity is something that can be identified in the user's work environment; something that the users want to track.
  1.    False
  2.    True
 Discuss Question
Answer: Option B. -> True
Question 252. 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 253. Entity instances are associated by relationship classes.
  1.    False
  2.    True
 Discuss Question
Answer: Option A. -> False
Question 254. 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 255. 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 256. Relationship classes are associations between entity classes.
  1.    False
  2.    True
 Discuss Question
Answer: Option B. -> True
Question 257. A maximum cardinality is the maximum number of entity instances that can participate in a relationship instance.
  1.    False
  2.    True
 Discuss Question
Answer: Option B. -> True
Question 258. An identifier typically uses more than one attribute.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 259. 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 260. An entity class is a collection of entities and is described by the structure of the entities in that class.
  1.    False
  2.    True
 Discuss Question
Answer: Option B. -> True

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