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. What logic function is produced by adding inverters to the inputs of an AND gate? a. OR b. NAND c. NOR d. X-OR 2 / 48 Category: Logic gates 2. 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 3 / 48 Category: Logic gates 3. An all or nothing gate is the other name of a. X-NOR gate b. AND gate c. X-OR gate d. OR gate 4 / 48 Category: Logic gates 4. 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 5 / 48 Category: Logic gates 5. 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 6 / 48 Category: Logic gates 6. X-OR and X-NOR gates can have how many inputs? a. 1 b. any number c. 2 d. 4 7 / 48 Category: Logic gates 7. What is the minimum number of NOR gates required to realize an X-OR gate? a. 6 b. 5 c. 3 d. 4 8 / 48 Category: Logic gates 8. Which of the following is known as a mod-2 adder? a. X-NOR gate b. NOR gate c. X-OR gate d. NAND gate 9 / 48 Category: Logic gates 9. An X-OR gate gives a high output a. if it has even number of 0s b. for odd decimal value c. if there are odd number of 1s d. if the decimal value of digital word is even 10 / 48 Category: Logic gates 10. An AND 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 11 / 48 Category: Logic gates 11. A combinational circuit can be designed using only a. AND gates b. OR gates c. NOR gates d. OR and X-NOR gates 12 / 48 Category: Logic gates 12. An any or all gate is the other name of a. AND gate b. OR gate c. X-OR gate d. X-NOR gate 13 / 48 Category: Logic gates 13. The number of rows in the truth table of a 4-input gate is a. 4 b. 16 c. 12 d. 8 14 / 48 Category: Logic gates 14. 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 15 / 48 Category: Logic gates 15. 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 16 / 48 Category: Logic gates 16. A bubbled NAND gate is equivalent to a a. NAND gate b. OR gate c. X-OR gate d. NOR gate 17 / 48 Category: Logic gates 17. A bubbled OR gate is equivalent to a a. NAND gate b. AND gate c. NOR gate d. X-OR gate 18 / 48 Category: Logic gates 18. What logic function is produced by adding an inverter to each input and output of an OR gate? a. NOR b. AND c. NAND d. X-OR 19 / 48 Category: Logic gates 19. A bubbled NAND gate is equivalent to a a. NOR gate b. OR gate c. NAND gate d. X-OR gate 20 / 48 Category: Logic gates 20. The output of a gate is LOW if and only if all its inputs are HIGH. it is true for a. X-NOR b. NAND c. NOR d. AND 21 / 48 Category: Logic gates 21. 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 22 / 48 Category: Logic gates 22. The NAND gate can function as a NOT gate if a. one input is set to 1 b. all inputs are connected together c. inputs are left open d. one input is set to 0 23 / 48 Category: Logic gates 23. 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 24 / 48 Category: Logic gates 24. 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. NOR d. NAND 25 / 48 Category: Logic gates 25. An OR gate can be imagined as a. transistors connected in parallel b. switches connected in series c. transistors connected in series d. switches connected in parallel 26 / 48 Category: Logic gates 26. 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-NOR b. X-OR c. AND d. OR 27 / 48 Category: Logic gates 27. 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 28 / 48 Category: Logic gates 28. A gate is inhibited when its inhibit input is at logic 1. The gate is a. AND b. NAND c. NONE OF THESE d. OR 29 / 48 Category: Logic gates 29. How many NOR gates are.required to obtain AND operation? a. 2 b. 3 c. 4 d. 1 30 / 48 Category: Logic gates 30. Which of the following gates cannot be used as an inverter? a. NOR b. X-NOR c. AND d. NAND 31 / 48 Category: Logic gates 31. NOT gates are to be added to the inputs of which gate to convert it to a NOR gate? a. X-NOR b. AND c. NAND d. OR 32 / 48 Category: Logic gates 32. A gate is enabled when its enable input is at logic 1. The gate is a. NAND b. NONE OF THESE c. NOR d. OR 33 / 48 Category: Logic gates 33. The output of a logic gate is 1 when all its inputs are at logic 0. The gate is either a. an OR or a NAND b. an X-OR or an X-NOR c. a NAND or a NOR d. an AND or an X-NOR 34 / 48 Category: Logic gates 34. The most suitable gate for comparing two bits is a. AND b. OR c. NAND d. X-OR 35 / 48 Category: Logic gates 35. Which of the following gates is known as anticoincidence detector? a. OR gate b. AND gate c. X-NOR gate d. X-OR gate 36 / 48 Category: Logic gates 36. An exclusive NOR gate is logically equivalent to a. NOT gate followed by a NOR gate b. X-OR gate followed by an inverter c. inverter followed by an X-OR gate d. complement of a NOR gate The 37 / 48 Category: Logic gates 37. NOT gates are to be added to the inputs of which gate to convert it to a NAND gate? a. NOT b. OR c. X-OR d. AND 38 / 48 Category: Logic gates 38. The output of a NOR gate is high a. only when all the inputs are low b. only when at least one input is high c. only when all the inputs are high d. (d) only when at least one input is low 39 / 48 Category: Logic gates 39. 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 OR or an X-NOR c. an OR or an X-OR d. an AND or a NOR 40 / 48 Category: Logic gates 40. A gate is disabled when its disable input is at logic 0. The gate is a. AND b. OR c. NOR d. NONE OF THESE 41 / 48 Category: Logic gates 41. 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 OR or an X-OR d. an AND or an OR 42 / 48 Category: Logic gates 42. What is the minimum number of NAND gates required to realize an X-OR gate? a. 5 b. 4 c. 3 d. 6 43 / 48 Category: Logic gates 43. Which of the following gate is known as a coincidence detector? a. X-NOR gate b. X-OR gate c. AND gate d. NAND gate 44 / 48 Category: Logic gates 44. What logic function is produced by adding inverters to the inputs of an OR gate? a. X-NOR b. NOR c. NAND d. AND 45 / 48 Category: Logic gates 45. The logic expression AB + Abar.Bbar can be implemented by giving the inputs A and B to a two input. a. X-NOR gate b. X-OR gate c. NOR gate d. NAND gate 46 / 48 Category: Logic gates 46. A bubbled NOR gate is equivalent to a a. NOR gate b. X-OR gate c. NAND gate d. AND gate 47 / 48 Category: Logic gates 47. 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. AND and NOT gates are necessary and sufficient for realization of any logic function d. OR and NOT gates are necessary and sufficient for realization of any logic function. 48 / 48 Category: Uncategorized 48. A combinational circuit can be designed using only a. NAND gates b. AND gates c. OR and X-NOR gates d. OR gates Your score isThe average score is 9% LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
