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