1. Which one of the following expressions does NOT represent exclusive NOR of x and y? a. xy + x' y' b. x ^ y' where ^ is XOR c. x' ^ y where ^ is XOR d. x' ^ y' where ^ is XOR

 2. The simplified SOP (Sum Of Product) form of the boolean expression (P + Q' + R') . (P + Q' + R) . (P + Q + R') is a. (P'.Q + R') b. (P + Q'.R') c. (P'.Q + R) d. (P.Q + R)

 3. The minterm expansion of f(P, Q, R) = PQ + QR' + PR' is a. m2 + m4 + m6 + m7 b. m0 + m1 + m3 + m5 c. m0 + m1 + m6 + m7 d. m2 + m3 + m4 + m5

 4. What is the minimum number of gates required to implement the Boolean function (AB+C)if we have to use only 2-input NOR gates? a. 2 b. 3 c. 4 d. 5

 5. If P, Q, R are Boolean variables, then (P + Q')(PQ' + PR)(P'R' + Q') simplifies a. PQ' b. PR' c. PQ' + R d. PR'' + Q

 6. How many 3-to-8 line decoders with an enable input are needed to construct a 6-to-64 line decoder without using any other logic gates? a. 7 b. 8 c. 9 d. 10

 7. Consider the following Boolean function of four variables: f(w,x,y,z) = ∑(1,3,4,6,9,11,12,14) The function is: a. independent of one variables b. independent of two variables c. independent of three variables d. dependent on all the variables