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Database Systems MCQs (Computer Science) From Textbook

Database Systems MCQs – Practice Test 22 (Chapter 4)

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Database Design and ER Model MCQ – Practice Test 22 PDF Download

MCQ 106: In the top-down design of refinement, the distinctions are made:

  1. Explicit
  2. Blurred
  3. Invisible
  4. Dependent

MCQ 107: In an E-R diagram, entity sets are represented by:

  1. Rectangles divided into two parts
  2. Undivided rectangle
  3. Diamond
  4. Circle

MCQ 108: The database schema is developed at conceptual-design phase which provides a:

  1. Narrow overview of the enterprise
  2. Detailed overview of the enterprise
  3. Limited overview of the enterprise
  4. Reflective overview of the enterprise

MCQ 109: The difference of entities must be expressed in terms of their:

  1. Values
  2. Locators
  3. Size
  4. Attributes

MCQ 110: The constraint type that requires that an entity belong to no more than one lower-level entity set, is said to be:

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

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