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