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