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Formal Relational Query Languages MCQs – Practice Test 13 PDF Download

MCQ 61: In order to validate set-difference operation r -s, the requirement is that the r and s be of same:

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

MCQ 62: The restricted tuple relational calculus is equivalent to the:

  1. Tuple relational calculus
  2. Attribute relational calculus
  3. Domain relational calculus
  4. Relational algebra

MCQ 63: The relational-algebraic expressions results does not have names, the operation that is used to give them names are said to be:

  1. name operator
  2. Identity operation
  3. rename operator
  4. re-identity operation

MCQ 64: The process of taking a collection of values and returning a single value as a result, is called:

  1. Comparative function
  2. Associate function
  3. Aggregate function
  4. Embedded function

MCQ 65: Relational algebra is a:

  1. Formal language
  2. Informal language
  3. Structured language
  4. Procedural language

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