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DBMS Functional Dependencies Aptitude Questions and Answers | Set 2

List of DBMS Functional Dependencies Aptitude Questions and Answers

6) Armstrong’s Axioms are?
  1. Set of rules to define attribute relation calculus.
  2. Set of rules which applied repeatedly generates a closure of Functional Dependency.
  3. Both 1 and 2.
  4. None of these.
Answer

7) According to argumentation rule, if X → Y holds and A is set of attributes, then it also holds?
  1. XA → Y
  2. X → YA
  3. XA → YA
  4. None of these.
Answer

8) In transitive rule, if a→b and b→c. Then it will also hold?
  1. a→c
  2. a→a
  3. a→b
  4. b→b
Answer

9) What is trivial functional dependency?
  1. If A→B holds where B is not subset of A.
  2. If A→B holds where B is subset of A.
  3. If A→B holds where B is not intersection of A.
  4. If A→B holds where B is intersection of A.
Answer

10) What is non-trivial functional dependency?
  1. If A→B holds where B is not subset of A.
  2. If A→B holds where B is subset of A.
  3. If A→B holds where B is not intersection of A.
  4. If A→B holds where B is intersection of A.
Answer

Functional Dependencies Aptitude | Set 1
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