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. Which of the following statements is true? a. NAND gates are not sufficient to realize any logic function b. OR and NOT gates are necessary and sufficient for realization of any logic function. c. NOR gates are sufficient to realize any logic function. d. AND and NOT gates are necessary and sufficient for realization of any logic function 2 / 48 Category: Logic gates 2. An AND gate can be imagined as a. switches connected in parallel b. switches connected in series c. transistors connected in series d. transistors connected in parallel 3 / 48 Category: Uncategorized 3. A combinational circuit can be designed using only a. NAND gates b. OR gates c. OR and X-NOR gates d. AND gates 4 / 48 Category: Logic gates 4. The NOR gate can function as a NOT gate if a. one input is set to 1 b. inputs are left open c. all inputs are connected together d. one input is set to 0 5 / 48 Category: Logic gates 5. What logic function is produced by adding an inverter to each input and output of an AND gate ? a. NAND b. X-OR c. NO d. OR 6 / 48 Category: Logic gates 6. A bubbled NAND gate is equivalent to a a. OR gate b. NOR gate c. X-OR gate d. NAND gate 7 / 48 Category: Logic gates 7. An any or all gate is the other name of a. OR gate b. X-OR gate c. AND gate d. X-NOR gate 8 / 48 Category: Logic gates 8. X-OR and X-NOR gates can have how many inputs? a. any number b. 2 c. 4 d. 1 9 / 48 Category: Logic gates 9. What logic function is produced by adding inverters to the inputs of an AND gate? a. NOR b. X-OR c. OR d. NAND 10 / 48 Category: Logic gates 10. The output of a gate is LOW when at least one of its inputs is HIGH. This is true for a. NAND b. AND c. NOR d. OR 11 / 48 Category: Logic gates 11. The output of a NOR gate is high a. only when all the inputs are high b. (d) 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 12 / 48 Category: Logic gates 12. A bubbled NAND gate is equivalent to a a. NOR gate b. NAND gate c. X-OR gate d. OR gate 13 / 48 Category: Logic gates 13. What is the minimum number of NAND gates required to realize an X-OR gate? a. 6 b. 4 c. 5 d. 3 14 / 48 Category: Logic gates 14. An all or nothing gate is the other name of a. AND gate b. X-NOR gate c. OR gate d. X-OR gate 15 / 48 Category: Logic gates 15. An exclusive NOR gate is logically equivalent to a. inverter followed by an X-OR gate b. complement of a NOR gate The c. NOT gate followed by a NOR gate d. X-OR gate followed by an inverter 16 / 48 Category: Logic gates 16. The most suitable gate for comparing two bits is a. OR b. NAND c. AND d. X-OR 17 / 48 Category: Logic gates 17. A gate is enabled when its enable input is at logic 0. The gate is a. NONE OF THESE b. NOR c. NAND d. AND 18 / 48 Category: Logic gates 18. 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 19 / 48 Category: Logic gates 19. How many NOR gates are.required to obtain AND operation? a. 4 b. 1 c. 3 d. 2 20 / 48 Category: Logic gates 20. 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. X-NOR c. AND d. OR 21 / 48 Category: Logic gates 21. The output of a gate is HIGH when at least one of its inputs is LOW. It is true for a. NOR b. AND c. NAND d. OR 22 / 48 Category: Logic gates 22. 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. NAND d. NOR 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. NOR c. NAND d. X-OR 24 / 48 Category: Logic gates 24. What is the minimum number of two-input NAND gates used to perform the function of 2-input OR gate? a. 3 b. 4 c. 2 d. 1 25 / 48 Category: Logic gates 25. What logic function is produced by adding inverters to the inputs of an OR gate? a. NAND b. AND c. X-NOR d. NOR 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. OR c. NAND d. AND 27 / 48 Category: Logic gates 27. Which of the following is known as a mod-2 adder? a. X-NOR gate b. NOR gate c. NAND gate d. X-OR gate 28 / 48 Category: Logic gates 28. 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. NAND gate d. X-OR gate 29 / 48 Category: Logic gates 29. Which of the following gates is known as anticoincidence detector? a. OR gate b. X-OR gate c. X-NOR gate d. AND gate 30 / 48 Category: Logic gates 30. 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 low d. only when all the inputs are high 31 / 48 Category: Logic gates 31. Which of the following gate is known as a coincidence detector? a. AND gate b. X-NOR gate c. NAND gate d. X-OR gate 32 / 48 Category: Logic gates 32. Which of the following gates cannot be used as an inverter? a. NAND b. AND c. NOR d. X-NOR 33 / 48 Category: Logic gates 33. A gate is enabled when its enable input is at logic 1. The gate is a. OR b. NAND c. NOR d. NONE OF THESE 34 / 48 Category: Logic gates 34. The output of a gate is HIGH if and only if all ts inputs are LOW. it is true for a. X-OR b. NOR c. X-NOR d. NAND 35 / 48 Category: Logic gates 35. A bubbled NOR gate is equivalent to a a. AND gate b. NAND gate c. X-OR gate d. NOR gate 36 / 48 Category: Logic gates 36. An OR gate can be imagined as a. switches connected in parallel b. transistors connected in parallel c. switches connected in series d. transistors connected in series 37 / 48 Category: Logic gates 37. The number of rows in the truth table of a 4-input gate is a. 16 b. 4 c. 12 d. 8 38 / 48 Category: Logic gates 38. 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. an OR or an X-OR d. a NAND or an X-OR 39 / 48 Category: Logic gates 39. 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 40 / 48 Category: Logic gates 40. What is the minimum number of NOR gates required to realize an X-OR gate? a. 5 b. 6 c. 4 d. 3 41 / 48 Category: Logic gates 41. A combinational circuit can be designed using only a. AND gates b. NOR gates c. OR gates d. OR and X-NOR gates 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. NAND or an AND b. a NOR or an X-NOR c. an OR or an X-OR d. a NAND or an X-OR 43 / 48 Category: Logic gates 43. 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 X-OR or an X-NOR c. an AND or an X-NOR d. an OR or a NAND 44 / 48 Category: Logic gates 44. 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 45 / 48 Category: Logic gates 45. A bubbled OR gate is equivalent to a a. X-OR gate b. AND gate c. NAND gate d. NOR gate 46 / 48 Category: Logic gates 46. NOT gates are to be added to the inputs of which gate to convert it to a NAND gate? a. AND b. OR c. NOT d. X-OR 47 / 48 Category: Logic gates 47. 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 48 / 48 Category: Logic gates 48. An X-OR gate gives a high output a. for odd decimal value b. if the decimal value of digital word is even c. if there are odd number of 1s 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
