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MCQ 16: The structure of the primary key for the relationship set depends on the:

  1. Entity sets
  2. Roles
  3. Mapping cardinalities
  4. Mapping expression

MCQ 17: The initial phase of database design is to:

  1. Choosing data model
  2. Conceptual design
  3. Characterize data needs
  4. Conceptual schema

MCQ 18: In generalization, the constraint in which membership is evaluated on the basis of an explicit predicate, is known as:

  1. User-defined
  2. System-defined
  3. Condition-defined
  4. Data-defined

MCQ 19: For performance calculations of an efficient database system, the main metrics is/are of type(s):

  1. 1 type
  2. 2 types
  3. 3 types
  4. 4 types

MCQ 20: The UML diagram that specifies the sequences/ steps of operations to be performed:

  1. Class diagram
  2. Use case diagram
  3. Activity diagram
  4. E-R diagram

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