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Database Management System MCQs (Computer Science) From Textbook

Database Management System MCQs – Practice Test 7 (Chapter 11)

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Relational Algebra & Calculus Quiz with Answers PDF Download – Test 7

MCQ 31: In relational calculus, the expression which does not guarantees finite number of tuples is classified as:

  1. unsafe expression
  2. safe expression
  3. declarative expression
  4. stable expression

MCQ 32: In unary relational operations, the PROJECT operation is partition of relation usually classified as:

  1. horizontal partition
  2. vertical partition
  3. insert partition
  4. delete partition

MCQ 33: The JOIN operation in which two attributes joined have same name in both relations is classified as:

  1. UNNATURAL JOIN
  2. THETA JOIN
  3. ALPHA JOIN
  4. NATURAL JOIN

MCQ 34: Consider two tuples A and B, the operation whose result includes tuples that are included in both relations is classified as:

  1. intersection of relation A and B
  2. difference of relation A and B
  3. square of relation A and B
  4. union of relation A and B

MCQ 35: The operation which is used to select the subset of tuples by satisfying the selection constraint and the selection is made from relation is classified as:

  1. CHOOSE operation
  2. SELECT operation
  3. NON-SELECT operation
  4. SUBSET operation

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