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