Digital Logic 2021 - objective

1. What output will go low in NAND Gate?

1. If all input are high
2. If all input are low
3. If any input is high
4. If any input is low

2. Which of the following is octal equivalent of (1E5)₂?

1. \( (5.848)_8 \)
2. \( (6.246)_8 \)
3. \( (5.599)_8 \)
4. \( (4.540)_8 \)

3. Which of the following is universal gate?

1. AND
2. OR
3. XOR
4. NAND

4. How many number of full and half-adders are required to add 16-bit number?

1. 16 half-adders, 15 full-adders
2. 16 half-adders, 16 full-adders
3. 15 half-adders, 16 full-adders
4. 15 half-adders, 15 full-adders

5. How many flip-flops are required to construct MOD-15 counter?

1. 3
2. 4
3. 5
4. 6

6. According to Boolean Algebra, What is the value of 1^X'-X?

1. 0
2. 1
3. X
4. X'

7. The logic circuit whose output at any instance of time depends only on the present inputs called

1. Combinational circuit
2. Sequential circuit
3. Counter
4. Flipflop

8. How many selection lines are required for 16:1 multiplexer?

1. 2
2. 3
3. 4
4. 5

9. In SR Flipflop, if Q-1 the output is said to be:

1. Set
2. Reset
3. Previous state
4. Current state

10. How many number of states a ring counter with 5 flips will have?

1. 10
2. 12
3. 15
4. 16