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. Which of the following is known as a mod-2 adder? a. NAND gate b. X-NOR gate c. X-OR gate d. NOR gate 2 / 48 Category: Logic gates 2. The output of a gate is HIGH when at least one of its inputs is LOW. It is true for a. NOR b. OR c. AND d. NAND 3 / 48 Category: Logic gates 3. The most suitable gate for comparing two bits is a. AND b. X-OR c. OR d. NAND 4 / 48 Category: Logic gates 4. 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 5 / 48 Category: Logic gates 5. A gate is enabled when its enable input is at logic 1. The gate is a. NAND b. OR c. NOR d. NONE OF THESE 6 / 48 Category: Logic gates 6. 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 7 / 48 Category: Logic gates 7. An all or nothing gate is the other name of a. X-OR gate b. AND gate c. X-NOR gate d. OR gate 8 / 48 Category: Uncategorized 8. A combinational circuit can be designed using only a. OR gates b. OR and X-NOR gates c. NAND gates d. AND gates 9 / 48 Category: Logic gates 9. A bubbled NAND gate is equivalent to a a. NOR gate b. NAND gate c. OR gate d. X-OR gate 10 / 48 Category: Logic gates 10. 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. OR and NOT gates are necessary and sufficient for realization of any logic function. d. AND and NOT gates are necessary and sufficient for realization of any logic function 11 / 48 Category: Logic gates 11. NOT gates are to be added to the inputs of which gate to convert it to a NOR gate? a. OR b. X-NOR c. NAND d. AND 12 / 48 Category: Logic gates 12. How many NOR gates are.required to obtain AND operation? a. 4 b. 2 c. 1 d. 3 13 / 48 Category: Logic gates 13. What is the minimum number of NOR gates required to realize an X-OR gate? a. 5 b. 3 c. 4 d. 6 14 / 48 Category: Logic gates 14. X-OR and X-NOR gates can have how many inputs? a. 4 b. 1 c. 2 d. any number 15 / 48 Category: Logic gates 15. A bubbled NOR gate is equivalent to a a. NAND gate b. AND gate c. NOR gate d. X-OR gate 16 / 48 Category: Logic gates 16. 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 17 / 48 Category: Logic gates 17. 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. OR c. X-OR d. AND 18 / 48 Category: Logic gates 18. The NOR gate can function as a NOT gate if a. inputs are left open b. one input is set to 0 c. one input is set to 1 d. all inputs are connected together 19 / 48 Category: Logic gates 19. 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. 4 d. 2 20 / 48 Category: Logic gates 20. An any or all gate is the other name of a. AND gate b. X-NOR gate c. X-OR gate d. OR gate 21 / 48 Category: Logic gates 21. A bubbled OR gate is equivalent to a a. X-OR gate b. AND gate c. NAND gate d. NOR gate 22 / 48 Category: Logic gates 22. An exclusive NOR gate is logically equivalent to a. NOT gate followed by a NOR gate b. X-OR gate followed by an inverter c. complement of a NOR gate The d. inverter followed by an X-OR gate 23 / 48 Category: Logic gates 23. 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 24 / 48 Category: Logic gates 24. A bubbled NAND gate is equivalent to a a. X-OR gate b. NOR gate c. OR gate d. NAND gate 25 / 48 Category: Logic gates 25. 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 26 / 48 Category: Logic gates 26. 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 27 / 48 Category: Logic gates 27. What is the minimum number of NAND gates required to realize an X-OR gate? a. 6 b. 4 c. 3 d. 5 28 / 48 Category: Logic gates 28. 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. all inputs are connected together d. inputs are left open 29 / 48 Category: Logic gates 29. 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 30 / 48 Category: Logic gates 30. What logic function is produced by adding an inverter to each input and output of an OR gate? a. NOR b. AND c. X-OR d. NAND 31 / 48 Category: Logic gates 31. The number of rows in the truth table of a 4-input gate is a. 16 b. 12 c. 8 d. 4 32 / 48 Category: Logic gates 32. A combinational circuit can be designed using only a. OR and X-NOR gates b. AND gates c. NOR gates d. OR gates 33 / 48 Category: Logic gates 33. Which of the following gate is known as a coincidence detector? a. NAND gate b. X-NOR gate c. X-OR gate d. AND gate 34 / 48 Category: Logic gates 34. 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 35 / 48 Category: Logic gates 35. The output of a gate is LOW when at least one of its inputs is HIGH. This is true for a. NAND b. OR c. 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-OR b. an AND or a NOR c. a NAND or an X-OR d. an OR or an X-NOR 37 / 48 Category: Logic gates 37. Which of the following gates is known as anticoincidence detector? a. X-OR gate b. AND gate c. OR gate d. X-NOR gate 38 / 48 Category: Logic gates 38. 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. a NAND or an X-OR c. a NOR or an X-NOR d. an OR or an X-OR 39 / 48 Category: Logic gates 39. Which of the following gates cannot be used as an inverter? a. NAND b. NOR c. AND d. X-NOR 40 / 48 Category: Logic gates 40. The output of a NAND gate is low a. only when all the inputs are low b. only when at least one input is low c. only when all the inputs are high d. only when at least one input is high 41 / 48 Category: Logic gates 41. The output of a logic gate is 1 when all its inputs are at logic 1. The gate is either a. an OR or an X-OR b. an AND or an OR c. an AND or a NOR d. a NAND or a NOR 42 / 48 Category: Logic gates 42. What logic function is produced by adding inverters to the inputs of an OR gate? a. X-NOR b. NAND c. NOR d. AND 43 / 48 Category: Logic gates 43. The output of a gate is LOW if and only if all its inputs are HIGH. it is true for a. AND b. X-NOR c. NOR d. NAND 44 / 48 Category: Logic gates 44. NOT gates are to be added to the inputs of which gate to convert it to a NAND gate? a. NOT b. AND c. OR d. X-OR 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. NAND d. NONE OF THESE 46 / 48 Category: Logic gates 46. 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. X-NOR gate d. NOR gate 47 / 48 Category: Logic gates 47. What logic function is produced by adding inverters to the inputs of an AND gate? a. OR b. X-OR c. NAND d. NOR 48 / 48 Category: Logic gates 48. 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 Your score isThe average score is 8% LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Share this
