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Transformation of Relational Expressions Multiple Choice Questions with Answers – PDF Download

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Transformation of Relational Expressions MCQs PDF Download – Prep Test

MCQ 1: The operations of Natural-join are:

  1. Commutative
  2. Associative
  3. Distributive
  4. Conjunctive

MCQ 2: The optimizer that explores the space of all query-evaluation plans is called:

  1. Cost-based
  2. Plan-based
  3. Estimate-based
  4. Count-based

MCQ 3: The process of replacement of a nested query by a query with a join is called:

  1. Correlation
  2. Decorrelation
  3. Materialization
  4. Non-materialization

MCQ 4: The operations of theta-join are:

  1. Distributive
  2. Conjunctive
  3. Commutative
  4. Associative

MCQ 5: The two expressions generate the same set of tuples on every legal database instance, the relational expressions are said to be:

  1. Dependent
  2. Independent
  3. Equivalent
  4. Non-equivalent

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