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. The most suitable gate for comparing two bits is a. X-OR b. NAND c. OR d. AND 2 / 48 Category: Logic gates 2. The output of a logic gate is 0 when all its inputs are at logic 0.The gate is either a. a NAND or an X-OR b. an AND or a NOR c. an OR or an X-OR d. an OR or an X-NOR 3 / 48 Category: Logic gates 3. A gate is disabled when its disable input is at logic 0. The gate is a. NOR b. AND c. NONE OF THESE d. OR 4 / 48 Category: Uncategorized 4. A combinational circuit can be designed using only a. NAND gates b. AND gates c. OR and X-NOR gates d. OR gates 5 / 48 Category: Logic gates 5. A bubbled NAND gate is equivalent to a a. NAND gate b. OR gate c. NOR gate d. X-OR gate 6 / 48 Category: Logic gates 6. 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 7 / 48 Category: Logic gates 7. What logic function is produced by adding inverters to the inputs of an OR gate? a. AND b. NAND c. X-NOR d. NOR 8 / 48 Category: Logic gates 8. 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. a NAND or an X-OR d. an OR or an X-OR 9 / 48 Category: Logic gates 9. The NOR 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 10 / 48 Category: Logic gates 10. 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. X-NOR c. OR d. X-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 all the inputs are low d. only when at least one input is high 12 / 48 Category: Logic gates 12. How many NOR gates are.required to obtain AND operation? a. 4 b. 3 c. 1 d. 2 13 / 48 Category: Logic gates 13. 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. NOR gate c. X-NOR gate d. NAND gate 14 / 48 Category: Logic gates 14. What logic function is produced by adding an inverter to each input and output of an AND gate ? a. X-OR b. OR c. NO d. NAND 15 / 48 Category: Logic gates 15. A bubbled OR gate is equivalent to a a. NAND gate b. X-OR gate c. AND gate d. NOR gate 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. A bubbled NOR gate is equivalent to a a. NAND gate b. X-OR gate c. AND gate d. NOR gate 18 / 48 Category: Logic gates 18. The output of a gate is LOW when at least one of its inputs is HIGH. This is true for a. NOR b. NAND c. AND d. OR 19 / 48 Category: Logic gates 19. The output of a NAND gate is low a. only when all the inputs are high b. only when all the inputs are low c. only when at least one input is low d. only when at least one input is high 20 / 48 Category: Logic gates 20. Which of the following gates is known as anticoincidence detector? a. X-OR gate b. AND gate c. OR gate d. X-NOR gate 21 / 48 Category: Logic gates 21. 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 22 / 48 Category: Logic gates 22. NOT gates are to be added to the inputs of which gate to convert it to a NAND gate? a. X-OR b. AND c. NOT d. OR 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. NAND b. X-NOR c. AND d. OR 24 / 48 Category: Logic gates 24. 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. NAND gates are not sufficient to realize any logic function d. NOR gates are sufficient to realize any logic function. 25 / 48 Category: Logic gates 25. An AND gate can be imagined as a. switches connected in series b. transistors connected in series c. transistors connected in parallel d. switches connected in parallel 26 / 48 Category: Logic gates 26. X-OR and X-NOR gates can have how many inputs? a. any number b. 4 c. 2 d. 1 27 / 48 Category: Logic gates 27. What is the minimum number of two-input NAND gates used to perform the function of 2-input OR gate? a. 2 b. 1 c. 3 d. 4 28 / 48 Category: Logic gates 28. A gate is enabled when its enable input is at logic 1. The gate is a. OR b. NONE OF THESE c. NAND d. NOR 29 / 48 Category: Logic gates 29. A combinational circuit can be designed using only a. OR gates b. OR and X-NOR gates c. NOR gates d. AND gates 30 / 48 Category: Logic gates 30. 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 31 / 48 Category: Logic gates 31. 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 32 / 48 Category: Logic gates 32. 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 33 / 48 Category: Logic gates 33. An OR gate can be imagined as a. switches connected in series b. transistors connected in series c. switches connected in parallel d. transistors connected in parallel 34 / 48 Category: Logic gates 34. An exclusive NOR gate is logically equivalent to a. complement of a NOR gate The b. X-OR gate followed by an inverter c. NOT gate followed by a NOR gate d. inverter followed by an X-OR gate 35 / 48 Category: Logic gates 35. An all or nothing gate is the other name of a. AND gate b. X-OR gate c. OR gate d. X-NOR gate 36 / 48 Category: Logic gates 36. What is the minimum number of NOR gates required to realize an X-OR gate? a. 5 b. 4 c. 3 d. 6 37 / 48 Category: Logic gates 37. What is the minimum number of NAND gates required to realize an X-OR gate? a. 4 b. 5 c. 3 d. 6 38 / 48 Category: Logic gates 38. What logic function is produced by adding inverters to the inputs of an AND gate? a. X-OR b. NOR c. NAND d. OR 39 / 48 Category: Logic gates 39. Which of the following gate is known as a coincidence detector? a. X-OR gate b. X-NOR gate c. AND gate d. NAND gate 40 / 48 Category: Logic gates 40. The number of rows in the truth table of a 4-input gate is a. 12 b. 4 c. 16 d. 8 41 / 48 Category: Logic gates 41. 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 42 / 48 Category: Logic gates 42. 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 43 / 48 Category: Logic gates 43. 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. NAND d. X-OR 44 / 48 Category: Logic gates 44. What logic function is produced by adding an inverter to each input and output of an OR gate? a. AND b. NAND c. NOR d. X-OR 45 / 48 Category: Logic gates 45. A gate is inhibited when its inhibit input is at logic 1. The gate is a. NONE OF THESE b. NAND c. AND d. OR 46 / 48 Category: Logic gates 46. An any or all gate is the other name of a. OR gate b. X-OR gate c. AND gate d. X-NOR gate 47 / 48 Category: Logic gates 47. Which of the following gates cannot be used as an inverter? a. NAND b. AND c. X-NOR d. NOR 48 / 48 Category: Logic gates 48. A bubbled NAND gate is equivalent to a a. NAND gate b. NOR gate c. X-OR gate d. OR gate Your score isThe average score is 10% LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
