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Database Systems MCQs – Practice Test 15 (Chapter 10)

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Formal Relational Query Languages Quiz – Practice Test 15 PDF Download

MCQ 71: The tuple relational calculus language is of type:

  1. Nonprocedural
  2. Formal
  3. Processed
  4. Structure

MCQ 72: The expression that would produce a relation containing the tuples in r but not in s, is:

  1. r + s
  2. r - s
  3. r / s
  4. r ^ s

MCQ 73: A relation basically is by definition a subset of a:

  1. Selection
  2. Projection
  3. Union
  4. Cartesian product

MCQ 74: For the union operation, the relations r and s must be of the same:

  1. Structure
  2. Definition
  3. Arity
  4. Declaration

MCQ 75: A query that involves a Cartesian product includes a:

  1. Projection operation
  2. Selection operation
  3. Union operation
  4. Set-intersection operation

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