# Logic gates MCQ Quiz

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Digital electronics

LOGIC GATES

Most important and interesting Questions of digital Logic gates

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Category: Logic gates

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

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

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Category: Logic gates

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

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4. An AND gate can be imagined as

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Category: Logic gates

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

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Category: Logic gates

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

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

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

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Category: Logic gates

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

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Category: Logic gates

10. An X-OR gate gives a high output

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

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Category: Logic gates

12. A combinational circuit can be designed using only

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Category: Logic gates

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

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Category: Logic gates

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

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Category: Logic gates

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

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Category: Logic gates

16. Which of the following statements is true?

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

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Category: Logic gates

18. The output of a NOR gate is high

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

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Category: Logic gates

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

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Category: Logic gates

21. The output of a NAND gate is low

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Category: Logic gates

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

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Category: Logic gates

23. 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?

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Category: Logic gates

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

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

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

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

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

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

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Category: Logic gates

30. A bubbled NOR gate is equivalent to a

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Category: Logic gates

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

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Category: Logic gates

32. An OR gate can be imagined as

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

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Category: Logic gates

34. A bubbled NAND gate is equivalent to a

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Category: Logic gates

35. The most suitable gate for comparing two bits is

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Category: Logic gates

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

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Category: Logic gates

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

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Category: Logic gates

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

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Category: Logic gates

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

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40. An exclusive NOR gate is logically equivalent to

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Category: Logic gates

41. A bubbled NAND gate is equivalent to a

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Category: Logic gates

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

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Category: Logic gates

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

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

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Category: Uncategorized

45. A combinational circuit can be designed using only

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Category: Logic gates

46. A bubbled OR gate is equivalent to a

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Category: Logic gates

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

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Category: Logic gates

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