Logic gates MCQ Quiz

1. A bubbled NAND gate is equivalent to a

2. An X-OR gate gives a high output

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

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

5. A bubbled NAND gate is equivalent to a

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

7. A combinational circuit can be designed using only

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

9. An AND gate can be imagined as

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

11. A bubbled NOR gate is equivalent to a

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

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

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

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

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

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

18. The output of a NAND gate is low

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

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

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

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

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

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

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

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

27. An exclusive NOR gate is logically equivalent to

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

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

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

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

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

33. The most suitable gate for comparing two bits is

34. 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?

35. A combinational circuit can be designed using only

36. Which of the following statements is true?

37. The output of a NOR gate is high

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

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

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

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

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

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

44. An OR gate can be imagined as

45. A bubbled OR gate is equivalent to a

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

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

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