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 39 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. X-NOR gate b. X-OR gate c. NOR gate d. NAND gate 2 / 48 Category: Logic gates 2. 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 3 / 48 Category: Logic gates 3. 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 a NOR c. an AND or an OR d. an OR or an X-OR 4 / 48 Category: Logic gates 4. The output of a NAND gate is low a. only when all the inputs are low b. only when all the inputs are high c. only when at least one input is low d. only when at least one input is high 5 / 48 Category: Logic gates 5. Which of the following gates cannot be used as an inverter? a. AND b. X-NOR c. NAND d. NOR 6 / 48 Category: Logic gates 6. A bubbled NAND gate is equivalent to a a. NAND gate b. OR gate c. NOR gate d. X-OR gate 7 / 48 Category: Logic gates 7. The most suitable gate for comparing two bits is a. AND b. OR c. NAND d. X-OR 8 / 48 Category: Uncategorized 8. A combinational circuit can be designed using only a. NAND gates b. AND gates c. OR gates d. OR and X-NOR gates 9 / 48 Category: Logic gates 9. The output of a NOR gate is high a. only when all the inputs are low b. only when all the inputs are high c. (d) only when at least one input is low d. only when at least one input is high 10 / 48 Category: Logic gates 10. X-OR and X-NOR gates can have how many inputs? a. 4 b. 1 c. 2 d. any number 11 / 48 Category: Logic gates 11. What logic function is produced by adding an inverter to each input and output of an OR gate? a. NOR b. NAND c. AND d. X-OR 12 / 48 Category: Logic gates 12. 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 13 / 48 Category: Logic gates 13. 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. a NOR or an X-NOR c. NAND or an AND d. an OR or an X-OR 14 / 48 Category: Logic gates 14. What logic function is produced by adding inverters to the inputs of an OR gate? a. AND b. X-NOR c. NOR d. NAND 15 / 48 Category: Logic gates 15. 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 16 / 48 Category: Logic gates 16. A gate is enabled when its enable input is at logic 1. The gate is a. NAND b. NOR c. NONE OF THESE d. OR 17 / 48 Category: Logic gates 17. What is the minimum number of NOR gates required to realize an X-OR gate? a. 6 b. 3 c. 5 d. 4 18 / 48 Category: Logic gates 18. An exclusive NOR gate is logically equivalent to a. X-OR gate followed by an inverter b. NOT gate followed by a NOR gate c. inverter followed by an X-OR gate d. complement of a NOR gate The 19 / 48 Category: Logic gates 19. 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. NOR d. NAND 20 / 48 Category: Logic gates 20. An OR gate can be imagined as a. switches connected in series b. switches connected in parallel c. transistors connected in series d. transistors connected in parallel 21 / 48 Category: Logic gates 21. A gate is disabled when its disable input is at logic 0. The gate is a. NONE OF THESE b. OR c. NOR d. AND 22 / 48 Category: Logic gates 22. The output of a gate is HIGH if and only if all ts inputs are LOW. it is true for a. X-NOR b. X-OR c. NOR d. NAND 23 / 48 Category: Logic gates 23. The number of rows in the truth table of a 4-input gate is a. 4 b. 12 c. 8 d. 16 24 / 48 Category: Logic gates 24. NOT gates are to be added to the inputs of which gate to convert it to a NAND gate? a. X-OR b. NOT c. AND d. OR 25 / 48 Category: Logic gates 25. What is the minimum number of NAND gates required to realize an X-OR gate? a. 3 b. 5 c. 4 d. 6 26 / 48 Category: Logic gates 26. The output of a gate is LOW when at least one of its inputs is HIGH. This is true for a. AND b. OR c. NAND d. NOR 27 / 48 Category: Logic gates 27. Which of the following gates is known as anticoincidence detector? a. X-NOR gate b. OR gate c. X-OR gate d. AND gate 28 / 48 Category: Logic gates 28. 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 29 / 48 Category: Logic gates 29. 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. NAND d. AND 30 / 48 Category: Logic gates 30. What logic function is produced by adding inverters to the inputs of an AND gate? a. OR b. NOR c. X-OR d. NAND 31 / 48 Category: Logic gates 31. What is the minimum number of two-input NAND gates used to perform the function of 2-input OR gate? a. 3 b. 2 c. 4 d. 1 32 / 48 Category: Logic gates 32. 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 33 / 48 Category: Logic gates 33. An all or nothing gate is the other name of a. X-OR gate b. AND gate c. X-NOR gate d. OR gate 34 / 48 Category: Logic gates 34. 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 35 / 48 Category: Logic gates 35. How many NOR gates are.required to obtain AND operation? a. 2 b. 3 c. 1 d. 4 36 / 48 Category: Logic gates 36. 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. AND b. OR c. X-OR d. X-NOR 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. all inputs are connected together d. one input is set to 0 38 / 48 Category: Logic gates 38. An any or all gate is the other name of a. OR gate b. X-OR gate c. X-NOR gate d. AND gate 39 / 48 Category: Logic gates 39. An AND gate can be imagined as a. switches connected in parallel b. transistors connected in series c. transistors connected in parallel d. switches connected in series 40 / 48 Category: Logic gates 40. A bubbled NAND gate is equivalent to a a. NAND gate b. OR gate c. X-OR gate d. NOR gate 41 / 48 Category: Logic gates 41. A gate is inhibited when its inhibit input is at logic 1. The gate is a. OR b. NAND c. AND d. NONE OF THESE 42 / 48 Category: Logic gates 42. A bubbled OR gate is equivalent to a a. NOR gate b. X-OR gate c. AND gate d. NAND gate 43 / 48 Category: Logic gates 43. A gate is enabled when its enable input is at logic 0. The gate is a. NONE OF THESE b. AND c. NAND d. NOR 44 / 48 Category: Logic gates 44. A combinational circuit can be designed using only a. NOR gates b. AND gates c. OR and X-NOR gates d. OR gates 45 / 48 Category: Logic gates 45. 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 AND or an X-NOR c. a NAND or a NOR d. an OR or a NAND 46 / 48 Category: Logic gates 46. A bubbled NOR gate is equivalent to a a. X-OR gate b. NOR gate c. NAND gate d. AND gate 47 / 48 Category: Logic gates 47. 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 48 / 48 Category: Logic gates 48. The NAND gate can function as a NOT gate if a. all inputs are connected together b. one input is set to 0 c. one input is set to 1 d. inputs are left open Your score isThe average score is 10% LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
