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. A bubbled NAND gate is equivalent to a a. OR gate b. NOR gate c. NAND gate d. X-OR gate 2 / 48 Category: Logic gates 2. What is the minimum number of NAND gates required to realize an X-OR gate? a. 5 b. 3 c. 6 d. 4 3 / 48 Category: Logic gates 3. Which of the following is known as a mod-2 adder? a. NOR gate b. X-OR gate c. NAND gate d. X-NOR gate 4 / 48 Category: Logic gates 4. 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 5 / 48 Category: Logic gates 5. A bubbled NAND gate is equivalent to a a. X-OR gate b. OR gate c. NAND gate d. NOR gate 6 / 48 Category: Logic gates 6. A gate is enabled when its enable input is at logic 0. The gate is a. NONE OF THESE b. NAND c. AND d. NOR 7 / 48 Category: Logic gates 7. What logic function is produced by adding inverters to the inputs of an OR gate? a. NAND b. NOR c. AND d. X-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. an OR or an X-OR b. a NAND or an X-OR c. a NOR or an X-NOR d. NAND or an AND 9 / 48 Category: Logic gates 9. An OR gate can be imagined as a. switches connected in series b. switches connected in parallel c. transistors connected in parallel d. transistors connected in series 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. NOR b. AND c. OR d. NAND 11 / 48 Category: Logic gates 11. 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. X-OR gate followed by an inverter d. complement of a NOR gate The 12 / 48 Category: Logic gates 12. 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 OR or a NAND c. an AND or an X-NOR d. an X-OR or an X-NOR 13 / 48 Category: Logic gates 13. 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. OR d. AND 14 / 48 Category: Logic gates 14. A gate is enabled when its enable input is at logic 1. The gate is a. NONE OF THESE b. NOR c. NAND d. OR 15 / 48 Category: Logic gates 15. What logic function is produced by adding an inverter to each input and output of an OR gate? a. X-OR b. NOR c. AND d. NAND 16 / 48 Category: Logic gates 16. 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 17 / 48 Category: Logic gates 17. The output of a gate is LOW if and only if all its inputs are HIGH. it is true for a. NAND b. X-NOR c. AND d. NOR 18 / 48 Category: Logic gates 18. The number of rows in the truth table of a 4-input gate is a. 8 b. 12 c. 16 d. 4 19 / 48 Category: Logic gates 19. A gate is disabled when its disable input is at logic 0. The gate is a. NOR b. NONE OF THESE c. OR d. AND 20 / 48 Category: Logic gates 20. An AND 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 21 / 48 Category: Uncategorized 21. A combinational circuit can be designed using only a. AND gates b. OR gates c. NAND gates d. OR and X-NOR gates 22 / 48 Category: Logic gates 22. Which of the following gates cannot be used as an inverter? a. NOR b. X-NOR c. NAND d. AND 23 / 48 Category: Logic gates 23. An any or all gate is the other name of a. OR gate b. X-NOR gate c. AND gate d. X-OR gate 24 / 48 Category: Logic gates 24. An X-OR gate gives a high output a. if the decimal value of digital word is even b. if there are odd number of 1s c. for odd decimal value d. if it has even number of 0s 25 / 48 Category: Logic gates 25. The output of a logic gate is 1 when all its inputs are at logic 1. The gate is either a. an AND or a NOR b. an AND or an OR c. an OR or an X-OR d. a NAND or a NOR 26 / 48 Category: Logic gates 26. 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-NOR b. a NAND or an X-OR c. an AND or a NOR d. an OR or an X-OR 27 / 48 Category: Logic gates 27. The NAND gate can function as a NOT gate if a. inputs are left open b. all inputs are connected together c. one input is set to 1 d. one input is set to 0 28 / 48 Category: Logic gates 28. The most suitable gate for comparing two bits is a. NAND b. OR c. AND d. X-OR 29 / 48 Category: Logic gates 29. A gate is inhibited when its inhibit input is at logic 1. The gate is a. NONE OF THESE b. OR c. AND d. NAND 30 / 48 Category: Logic gates 30. A bubbled NOR gate is equivalent to a a. NAND gate b. AND gate c. X-OR gate d. NOR gate 31 / 48 Category: Logic gates 31. What logic function is produced by adding an inverter to each input and output of an AND gate ? a. NO b. NAND c. OR d. X-OR 32 / 48 Category: Logic gates 32. Which of the following statements is true? a. OR and NOT gates are necessary and sufficient for realization of 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. NOR gates are sufficient to realize any logic function. 33 / 48 Category: Logic gates 33. The logic expression AB + Abar.Bbar can be implemented by giving the inputs A and B to a two input. a. NAND gate b. NOR gate c. X-OR gate d. X-NOR gate 34 / 48 Category: Logic gates 34. The output of a gate is HIGH when at least one of its inputs is LOW. It is true for a. AND b. NAND c. NOR d. OR 35 / 48 Category: Logic gates 35. How many NOR gates are.required to obtain AND operation? a. 1 b. 3 c. 4 d. 2 36 / 48 Category: Logic gates 36. A bubbled OR gate is equivalent to a a. NAND gate b. AND gate c. X-OR gate d. NOR gate 37 / 48 Category: Logic gates 37. Which of the following gates is known as anticoincidence detector? a. AND gate b. X-NOR gate c. X-OR gate d. OR gate 38 / 48 Category: Logic gates 38. NOT gates are to be added to the inputs of which gate to convert it to a NAND gate? a. NOT b. X-OR c. AND d. OR 39 / 48 Category: Logic gates 39. The output of a NAND gate is low a. only when at least one input is low b. only when at least one input is high c. only when all the inputs are high d. only when all the inputs are low 40 / 48 Category: Logic gates 40. An all or nothing gate is the other name of a. X-OR gate b. OR gate c. AND gate d. X-NOR gate 41 / 48 Category: Logic gates 41. X-OR and X-NOR gates can have how many inputs? a. 1 b. 2 c. any number d. 4 42 / 48 Category: Logic gates 42. What logic function is produced by adding inverters to the inputs of an AND gate? a. NAND b. OR c. NOR d. X-OR 43 / 48 Category: Logic gates 43. NOT gates are to be added to the inputs of which gate to convert it to a NOR gate? a. NAND b. OR c. X-NOR d. AND 44 / 48 Category: Logic gates 44. A combinational circuit can be designed using only a. AND gates b. OR gates c. OR and X-NOR gates d. NOR gates 45 / 48 Category: Logic gates 45. The output of a gate is HIGH if and only if all ts inputs are LOW. it is true for a. NAND b. X-OR c. NOR d. X-NOR 46 / 48 Category: Logic gates 46. What is the minimum number of NOR gates required to realize an X-OR gate? a. 4 b. 5 c. 6 d. 3 47 / 48 Category: Logic gates 47. 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. inputs are left open d. all inputs are connected together 48 / 48 Category: Logic gates 48. 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 Your score isThe average score is 10% LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
