1. Y=f(A, B) = ?M(0, 1, 2, 3) represents (M is Maxterm) ?

NOR gate

NAND gate

OR gate

a situation where output is independent of input

Answer: a situation where output is independent of input

Explanation:


2. While obtaining minimal sum of products expression ?

all don't cares are ignored

all don't cares are treated as logic ones

all don't cares are treated as logic zeros

only such don't cares that aid minimisation are treated as logic ones

Answer: only such don't cares that aid minimisation are treated as logic ones

Explanation:


3. The NOR gate can function as a NOT gate if ?

all inputs are connected together

inputs are left open

one input is set to 0

one input is set to 1

Answer: one input is set to 0

Explanation:


4. Which of the following gates is known as a coincidence detector ?

AND gate

NAND gate

X-OR gate

X-NOR gate

Answer: X-NOR gate

Explanation:


5. An all or nothing gate is the other name of ?

AND gate

OR gate

X-OR gate

X-NOR gate

Answer: AND gate

Explanation:

AND gate is called an all or nothing gate. Because it produce high only when all its inputs are high. In all other case its output is low.


6. An any or all gate is the other name of ?

AND gate

OR gate

X-OR gate

X-NOR gate

Answer: OR gate

Explanation:

OR gate is called an any or all gate. Because it produces high when at least one input is high and output is low when all inputs are low.


7. What is the logic which controls a stair case light associated with two switches A and B located at the bottom and top of the stair case respectively ?

OR

AND

X-OR

X-NOR

Answer: X-OR

Explanation:


8. A+B=Y is the Boolean function for ?

AND gate

NAND gate

NOR gate

OR gate

Answer: OR gate

Explanation:


9. When will be the output of an OR gate is LOW ?

When any input is HIGH

When any input is LOW

When all input is LOW

When all inputs are HIGH

Answer: When all input is LOW

Explanation:


10. When will be the output of an AND gate is LOW ?

When any input is LOW

When any input is HIGH

When all inputs are HIGH

When all input is LOW

Answer: When any input is LOW

Explanation: