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