HomeElectronics Multiple choice question MCQ online testLogic gates MCQ Quiz Logic gates MCQ Quiz Leave a Comment / Electronics Multiple choice question MCQ online test Share this /48 0 votes, 0 avg 18 Created on June 20, 2023Digital electronics LOGIC GATES Most important and interesting Questions of digital Logic gates 1 / 48 Category: Logic gates 1. Which of the following gate is known as a coincidence detector? a. X-OR gate b. NAND gate c. AND gate d. X-NOR gate 2 / 48 Category: Logic gates 2. What logic function is produced by adding an inverter to each input and output of an AND gate ? a. X-OR b. NO c. OR d. NAND 3 / 48 Category: Logic gates 3. An all or nothing gate is the other name of a. X-NOR gate b. AND gate c. X-OR gate d. OR gate 4 / 48 Category: Logic gates 4. A bubbled NAND gate is equivalent to a a. OR gate b. NAND gate c. X-OR gate d. NOR gate 5 / 48 Category: Logic gates 5. A bubbled NAND gate is equivalent to a a. NAND gate b. OR gate c. X-OR gate d. NOR gate 6 / 48 Category: Logic gates 6. NOT gates are to be added to the inputs of which gate to convert it to a NAND gate? a. X-OR b. OR c. AND d. NOT 7 / 48 Category: Logic gates 7. A bubbled NOR gate is equivalent to a a. NOR gate b. X-OR gate c. AND gate d. NAND gate 8 / 48 Category: Logic gates 8. The output of a logic gate is 1 when all its inputs are at logic 0. The gate is either a. an AND or an X-NOR b. a NAND or a NOR c. an X-OR or an X-NOR d. an OR or a NAND 9 / 48 Category: Logic gates 9. A gate is disabled when its disable input is at logic 0. The gate is a. OR b. NONE OF THESE c. NOR d. AND 10 / 48 Category: Logic gates 10. What logic function is produced by adding inverters to the inputs of an AND gate? a. OR b. X-OR c. NAND d. NOR 11 / 48 Category: Uncategorized 11. A combinational circuit can be designed using only a. OR and X-NOR gates b. AND gates c. OR gates d. NAND gates 12 / 48 Category: Logic gates 12. Which of the following gates cannot be used as an inverter? a. X-NOR b. NAND c. NOR d. AND 13 / 48 Category: Logic gates 13. A gate is enabled when its enable input is at logic 0. The gate is a. NONE OF THESE b. NAND c. AND d. NOR 14 / 48 Category: Logic gates 14. What is the minimum number of two-input NAND gates used to perform the function of 2-input OR gate? a. 1 b. 3 c. 2 d. 4 15 / 48 Category: Logic gates 15. A gate is enabled when its enable input is at logic 1. The gate is a. NAND b. NONE OF THESE c. OR d. NOR 16 / 48 Category: Logic gates 16. A bubbled OR gate is equivalent to a a. AND gate b. NAND gate c. X-OR gate d. NOR gate 17 / 48 Category: Logic gates 17. The output of a logic gate is 0 when all its inputs are at logic 1. The gate is either a. a NAND or an X-OR b. NAND or an AND c. a NOR or an X-NOR d. an OR or an X-OR 18 / 48 Category: Logic gates 18. The output of a gate is HIGH if and only if all ts inputs are LOW. it is true for a. X-NOR b. NOR c. X-OR d. NAND 19 / 48 Category: Logic gates 19. The output of a NAND gate is low a. only when all the inputs are low b. only when at least one input is high c. only when at least one input is low d. only when all the inputs are high 20 / 48 Category: Logic gates 20. What is the minimum number of NOR gates required to realize an X-OR gate? a. 5 b. 6 c. 4 d. 3 21 / 48 Category: Logic gates 21. The number of rows in the truth table of a 4-input gate is a. 8 b. 4 c. 12 d. 16 22 / 48 Category: Logic gates 22. The output of a NOR gate is high a. only when all the inputs are high b. (d) only when at least one input is low c. only when all the inputs are low d. only when at least one input is high 23 / 48 Category: Logic gates 23. The output of a gate is HIGH when at least one of its inputs is LOW. It is true for a. AND b. OR c. NOR d. NAND 24 / 48 Category: Logic gates 24. What logic function is produced by adding an inverter to each input and output of an OR gate? a. NAND b. AND c. X-OR d. NOR 25 / 48 Category: Logic gates 25. What is the minimum number of NAND gates required to realize an X-OR gate? a. 3 b. 6 c. 4 d. 5 26 / 48 Category: Logic gates 26. How many NOR gates are.required to obtain AND operation? a. 4 b. 2 c. 1 d. 3 27 / 48 Category: Logic gates 27. An exclusive NOR gate is logically equivalent to a. inverter followed by an X-OR gate b. NOT gate followed by a NOR gate c. X-OR gate followed by an inverter d. complement of a NOR gate The 28 / 48 Category: Logic gates 28. The output of a logic gate is 1 when all its inputs are at logic 1. The gate is either a. an AND or a NOR b. an OR or an X-OR c. an AND or an OR d. a NAND or a NOR 29 / 48 Category: Logic gates 29. The logic expression AB + Abar.Bbar can be implemented by giving the inputs A and B to a two input. a. NOR gate b. X-NOR gate c. X-OR gate d. NAND gate 30 / 48 Category: Logic gates 30. Which of the following statements is true? a. NOR gates are sufficient to realize any logic function. b. AND and NOT gates are necessary and sufficient for realization of any logic function c. NAND gates are not sufficient to realize any logic function d. OR and NOT gates are necessary and sufficient for realization of any logic function. 31 / 48 Category: Logic gates 31. An OR gate can be imagined as a. transistors connected in parallel b. switches connected in series c. switches connected in parallel d. transistors connected in series 32 / 48 Category: Logic gates 32. The NOR gate can function as a NOT gate if a. one input is set to 0 b. all inputs are connected together c. one input is set to 1 d. inputs are left open 33 / 48 Category: Logic gates 33. X-OR and X-NOR gates can have how many inputs? a. 4 b. any number c. 1 d. 2 34 / 48 Category: Logic gates 34. A gate is inhibited when its inhibit input is at logic 1. The gate is a. NAND b. AND c. NONE OF THESE d. OR 35 / 48 Category: Logic gates 35. What logic function is produced by adding inverters to the inputs of an OR gate? a. NAND b. NOR c. AND d. X-NOR 36 / 48 Category: Logic gates 36. NOT gates are to be added to the inputs of which gate to convert it to a NOR gate? a. AND b. OR c. NAND d. X-NOR 37 / 48 Category: Logic gates 37. The output of a gate is LOW when at least one of its inputs is HIGH. This is true for a. NAND b. AND c. NOR d. OR 38 / 48 Category: Logic gates 38. The most suitable gate for comparing two bits is a. X-OR b. OR c. AND d. NAND 39 / 48 Category: Logic gates 39. An any or all gate is the other name of a. X-OR gate b. X-NOR gate c. OR gate d. AND gate 40 / 48 Category: Logic gates 40. A combinational circuit can be designed using only a. NOR gates b. OR gates c. OR and X-NOR gates d. AND gates 41 / 48 Category: Logic gates 41. Which of the following is known as a mod-2 adder? a. NOR gate b. X-NOR gate c. X-OR gate d. NAND gate 42 / 48 Category: Logic gates 42. An X-OR gate gives a high output a. for odd decimal value b. if it has even number of 0s c. if the decimal value of digital word is even d. if there are odd number of 1s 43 / 48 Category: Logic gates 43. The NAND gate can function as a NOT gate if a. inputs are left open b. all inputs are connected together c. one input is set to 0 d. one input is set to 1 44 / 48 Category: Logic gates 44. Which of the following gates is known as anticoincidence detector? a. OR gate b. X-OR gate c. AND gate d. X-NOR gate 45 / 48 Category: Logic gates 45. An AND gate can be imagined as a. switches connected in parallel b. transistors connected in series c. switches connected in series d. transistors connected in parallel 46 / 48 Category: Logic gates 46. The output of a logic gate is 0 when all its inputs are at logic 0.The gate is either a. an OR or an X-OR b. a NAND or an X-OR c. an OR or an X-NOR d. an AND or a NOR 47 / 48 Category: Logic gates 47. The output of a gate is LOW if and only if all its inputs are HIGH. it is true for a. NOR b. X-NOR c. NAND d. AND 48 / 48 Category: Logic gates 48. What is the logic which controls a stair case light associated with two switches A and B locatedat the bottom and top of the stair case respectively? a. X-NOR b. X-OR c. OR d. AND Your score isThe average score is 9% LinkedIn Facebook Twitter 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Share this