Boolean Algebra and minimization techiniques MCQs

Digital Electronics MCQs

1. The only function of NOT gate is to ______.

a. Invert an input signal

b. Act as a universal gate

c. Stop a signal

d. None of these

2. Negative logic in a logic circuit is one in which______.

a. Logic 0 voltage level is higher than logic 1 voltage level

b. Logic 0 voltage level is lower than logic 1 voltage level

c. Logic 0 and 1 are represented by zero and positive voltages respectively

d. Logic 0 and 1 are represented by the negative and zero voltages respectively

3. Which of the following Boolean expression is not true?

a. A . A = A

b. A + A bar = 1

c. A + 1 = A

d. A .A bar = 0

4. The POS form of expression is suitable for circuit using______.

a. NAND

b. AND

c. XOR

d. NOR

5. Which of the following is/are the correct reason for using Gray code in k-maps?

a. Gray code provides cell values that differ in only one bit in adjacent cells

b. Gray code is efficient than binary code

c. No other code is available

d. All of the above

6. When eight adjacent 1's are grouped horizontally or vertically, the group so found is called_____.

a. Octet

b. Quad

c. Pair

d. Hex

7. For 4 number of variables, maximum possible self dual expressions are______.

a. 256

b. 16

c. 65536

d. None of these

8. The minimized output equation of the k-map shown below has.

K-map table

a. 9 minterms

b. 6 minterms

c. 7 minterms

d. 5 minterms