Discrete Structure (DS) MCQs with answers Page - 4

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Q. p→q is logically equivalent to ~p V q according to…

  • (A) Identity law
  • (B) Implication law
  • (C) associative law
  • (D) Absoption law

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Q. A logical expression which consist of a product of elementary sum is caleed…..

  • (A) Disjunctive normal form
  • (B) Conjunctive normal form
  • (C) Normal form
  • (D) None

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Q. A logical expression which consist of a sum of product is caleed…..

  • (A) Disjunctive normal form
  • (B) Conjunctive normal form
  • (C) Normal form
  • (D) None

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Q. An assertion that contains one or more variable is called a….

  • (A) CNF
  • (B) DNF
  • (C) Predicates
  • (D) Quantifiers

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Q. Determine the validity of argument given: s1: If I like mathematics then I will study. S2: Either I will study or I will fail. S: If I fail then I do not mlike mathematics.

  • (A) Valid
  • (B) Invalid
  • (C) Both a and b
  • (D) none

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Q. p V ~(p٨q) is….

  • (A) Contradiction
  • (B) Tautology
  • (C) predicate
  • (D) None

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Q. Determine the validity of the argument s1: If I stay up late at night , then I will be tired in the morning. S2: I stayed up last last night s: I am tired this morning.

  • (A) Valid
  • (B) Invalid
  • (C) Both a and b
  • (D) none

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Q. An argument is valid if, whenever the conclusion is true, thenthe premises are also true.

  • (A) TRUE
  • (B) FALSE
  • (C) both a and b
  • (D) none

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Q. In a club , all members participate either in tambola or the fete. 420 participate in the fete, 350 play tambola and 220 participate in both. How many members does the club have?

  • (A) 250
  • (B) 550
  • (C) 120
  • (D) 140

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Q. dual of (p V q)٨ r is..

  • (A) p Vq
  • (B) (p٨q) Vr
  • (C) p ٨r
  • (D) (p Vq) Vr

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