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Question 157

For R(A, B, C, D) with FDs A → B and B → C, the closure A+ is:

  1. A{A, B, C}
  2. B{A}
  3. C{A, B}
  4. D{A, B, C, D}
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Correct answer: (A) {A, B, C}

Explanation

A gives B, B gives C; D is not derivable.

From DSSSB TGT Computer Science Full Mock Test 3

This is question 157 of DSSSB TGT Computer Science Full Mock Test 3. 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.