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