Logic gates MCQ Quiz

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

2. A gate is inhibited when its inhibit input is at logic 1. The gate is

3. A gate is disabled when its disable input is at logic 0. The gate is

4. A bubbled NOR gate is equivalent to a

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

6. A gate is enabled when its enable input is at logic 0. The gate is

7. An OR gate can be imagined as

8. An exclusive NOR gate is logically equivalent to

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

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

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

12. What is the minimum number of NOR gates required to realize an X-OR gate?

13. An all or nothing gate is the other name of

14. What is the minimum number of NAND gates required to realize an X-OR gate?

15. The most suitable gate for comparing two bits is

16. An any or all gate is the other name of

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

18. A bubbled NAND gate is equivalent to a

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

20. The output of a gate is LOW when at least one of its inputs is HIGH. This is true for

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

22. A combinational circuit can be designed using only

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

24. A bubbled NAND gate is equivalent to a

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

26. Which of the following gates cannot be used as an inverter?

27. The output of a NOR gate is high

28. How many NOR gates are.required to obtain AND operation?

29. An AND gate can be imagined as

30. The number of rows in the truth table of a 4-input gate is

31. The output of a logic gate is 1 when all its inputs are at logic 0. The gate is either

32. The output of a logic gate is 0 when all its inputs are at logic 1. The gate is either

33. The output of a logic gate is 0 when all its inputs are at logic 0.The gate is either

34. A bubbled OR gate is equivalent to a

35. The output of a gate is LOW if and only if all its inputs are HIGH. it is true for

36. The output of a gate is HIGH if and only if all ts inputs are LOW. it is true for

37. A gate is enabled when its enable input is at logic 1. The gate is

38. 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?

39. Which of the following statements is true?

40. The output of a NAND gate is low

41. Which of the following gate is known as a coincidence detector?

42. An X-OR gate gives a high output

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

44. Which of the following gates is known as anticoincidence detector?

45. The output of a logic gate is 1 when all its inputs are at logic 1. The gate is either

46. A combinational circuit can be designed using only

47. The output of a gate is HIGH when at least one of its inputs is LOW. It is true for

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