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Consider the relation R (PQRSTU) with the set of functional dependencies F = {P → RT, Q → S, R → PS, QS → TU}. Find the closures of PQ.

3719Medium DSSSB TGT Computer Science 0 replies 2 views
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Consider the relation R (PQRSTU) with the set of functional dependencies F = {P → RT, Q → S, R → PS, QS → TU}. Find the closures of PQ.

  • APQRST
  • BPQRTU
  • CPQRSU
  • DPQRSTU
Correct answer: D

Explanation

PQ gives R, T (from P) and S (from Q). R gives P, S, and QS gives T, U. So the closure is PQRSTU.
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