# 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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1. A bubbled NAND gate is equivalent to a

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2. The output of a NOR gate is high

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3. A combinational circuit can be designed using only

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

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5. 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

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

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

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

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

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10. The most suitable gate for comparing two bits is

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

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

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13. An X-OR gate gives a high output

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Category: Logic gates

14. A bubbled NAND gate is equivalent to a

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

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

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

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18. The output of a NAND gate is low

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19. An exclusive NOR gate is logically equivalent to

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

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Category: Uncategorized

21. A combinational circuit can be designed using only

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22. 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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23. Which of the following statements is true?

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24. An OR gate can be imagined as

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

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Category: Logic gates

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

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

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

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

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

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31. An AND gate can be imagined as

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Category: Logic gates

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

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

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

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Category: Logic gates

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

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Category: Logic gates

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

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Category: Logic gates

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

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

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Category: Logic gates

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

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40. A bubbled OR gate is equivalent to a

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Category: Logic gates

41. A bubbled NOR gate is equivalent to a

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

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43. 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

44. 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

45. 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

46. 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

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

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