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Question 53

The difference (−) operation removes common tuples from the first relation. This operation is

  1. ACommutative and associative
  2. BNon-commutative and associative
  3. CCommutative and non-associative
  4. DNon-commutative and non-associative
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Correct answer: (D) Non-commutative and non-associative

Explanation

Corrected: the book's key says (b). Set difference is neither commutative (R − S ≠ S − R) nor associative.

From DSSSB TGT Computer Science Practice Set 2

This is question 53 of DSSSB TGT Computer Science Practice Set 2. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.