1. The difference between the diagram of a NOR and OR gate is ?

OR has got a bubble at its output terminal

NOR has got a bubble at its output terminal

OR is more squared than NOR

OR is more oval than NOR

Answer: OR is more oval than NOR

Explanation:


2. The logic gate that will have a LOW output when any one of its inputs is HIGH is the ?

NAND gate

AND gate

NOR gate

OR gate

Answer: NOR gate

Explanation:


3. The Boolean expression for a 3-input AND gate is ________ ?

X = AB

X = ABC

X = A + B + C

X = AB + C

Answer: X = ABC

Explanation:


4. What does the small bubble on the output of the NAND gate logic symbol mean ?

open collector output

tristate

The output is inverted

none of the above

Answer: The output is inverted

Explanation:


5. Which of the following is not a basic Boolean operation ?

OR

NOT

AND

EX-OR

Answer: EX-OR

Explanation:


6. The minimum number of 2-input NAND gates required to implement the Boolean function ???? = ???????? ?????, assuming that A, B and C are available is ?

Two

Three

Five

Six

Answer: Five

Explanation:


7. If a 3-input NOR gate has eight input possibilities, how many of those possibilities will result in a HIGH output ?

1

2

7

8

Answer: 1

Explanation:


8. The Boolean function Y= AB + CD is to be realized using only 2 input NAND gates .The minimum number of gates required is ?

3

4

5

2

Answer: 2

Explanation:


9. The NAND gate output will be low if the two inputs are: ?

00

01

10

11

Answer: 11

Explanation:


10. When will be the output of a NOT gate is HIGH ?

the input is HIGH

the input is LOW

the input is HIGH and LOW

none of the above

Answer: the input is LOW

Explanation: