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MCQ 21: A relationship line may have an associated minimum and maximum:

  1. Values
  2. Cardinalities
  3. Range
  4. Attributes

MCQ 22: In generalization, the higher-level entities are designated by the term:

  1. Strong entity set
  2. Weak entity set
  3. Superclass
  4. Subclass

MCQ 23: The entity-relationship model is used to represent the conceptual design of the database at the level:

  1. First stage
  2. Second stage
  3. Third stage
  4. Fourth stage

MCQ 24: Specifying whether or not an entity in the superclass set must belong to at least one of subclass sets within specialization, by the constraint type:

  1. Completeness constraint
  2. Disjointness constraint
  3. Overlapping constraint
  4. Existence constraint

MCQ 25: In E-R diagrams, a weak entity set is represented via a:

  1. Rectangle
  2. Diamond
  3. Circle
  4. Double diamonds

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