# Logic gates MCQ SET-1

Logic Gates MCQ Set-1 Question with Answer

1. A combinational circuit can be designed using only

2. A combinational circuit can be designed using only

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

4. The NAND gate can function as a NOT gate if

Answer : (A) All input are connected together

5. The NOR gate can function as a NOT gate if

Answer : (A) All inputs are connected Together

##### Logic Gates MCQ

6. An X-OR gate gives a high output

Answer : (A) If there are odd number of 1s

7. An exclusive NOR gate is logically equivalent to

Answer : (B) X-OR gate followed by an inverter

8. The X-OR and X-NOR gates can have how many inputs?

9. The logic expression AB + A’B’ can be implemented by giving the inputs A and B to a two input

10. The logic expression AB’ + A’B can be implemented by giving the inputs A and B to a two input

##### Logic Gates MCQ

11. Which of the following is known as a mod-2 adder?

12. What is the minimum number of two input NAND gates used to perform the function of 2-input OR gate?

13. NOT gates are to be added to the inputs of which gate to convert it to a NAND gate?

14. NOT gates are to be added to the inputs of which gate to convert it to a NOR gate?

15. What logic function is produced by adding inverters to the inputs of an AND gate?

##### Logic Gates MCQ

16. What logic function is produced by adding inverters to the inputs of an OR gate?

17. What logic function is produced by adding an inverter to each input and output of an AND gate?

18. What logic function is produced by adding an inverter to each input and output of an OR gate?

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