mcqs

 

MCQ Questions (Logic & Switching Circuits)

1. The negation of p→q is:
   a) ¬p→q
   b) p∧¬q
   c) ¬p∧q
   d) p∨q


2. The statement p↔q is equivalent to:
   a) (p→q)∨(q→p)
   b) (p→q)∧(q→p)
   c) p∨q
   d) p∧q


3. The dual of p∨(q∧r) is:
   a) p∧(q∨r)
   b) p∨(q∨r)
   c) p∧(q∧r)
   d) p∨q∨r


4. A statement which is always true is called:
   a) Contradiction
   b) Tautology
   c) Contingency
   d) Negation


5. In switching circuits, series connection represents:
   a) OR
   b) AND
   c) NOT
   d) XOR


6. Parallel switches represent:
   a) AND
   b) OR
   c) NOT
   d) NAND


7. The negation of p∨q is:
   a) ¬p∨¬q
   b) ¬p∧¬q
   c) p∧q
   d) p∨¬q


8. Complementary switches are denoted by:
   a) S₁, S₂
   b) S, S′
   c) p, q
   d) A, B


9. The statement ¬(¬p) is equal to:
   a) p
   b) ¬p
   c) p∨p
   d) p∧p


10. The truth value of p∧q is true when:
    a) Both false
    b) One true
    c) Both true
    d) None


11. The symbolic form of implication is:
    a) ∧
    b) ∨
    c) →
    d) ¬


12. A statement which is always false is:
    a) Tautology
    b) Contradiction
    c) Contingency
    d) Implication