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 24 Created on June 20, 2023Digital electronics LOGIC GATES Most important and interesting Questions of digital Logic gates 1 / 48 Category: Logic gates 1. NOT gates are to be added to the inputs of which gate to convert it to a NOR gate? a. OR b. AND c. X-NOR d. NAND 2 / 48 Category: Logic gates 2. The output of a NOR gate is high a. only when at least one input is high b. only when all the inputs are high c. only when all the inputs are low d. (d) only when at least one input is low 3 / 48 Category: Logic gates 3. The output of a gate is LOW if and only if all its inputs are HIGH. it is true for a. NAND b. AND c. X-NOR d. NOR 4 / 48 Category: Logic gates 4. An AND gate can be imagined as a. transistors connected in parallel b. switches connected in parallel c. switches connected in series d. transistors connected in series 5 / 48 Category: Logic gates 5. A gate is disabled when its disable input is at logic 0. The gate is a. OR b. AND c. NOR d. NONE OF THESE 6 / 48 Category: Logic gates 6. Which of the following is known as a mod-2 adder? a. X-OR gate b. X-NOR gate c. NAND gate d. NOR gate 7 / 48 Category: Uncategorized 7. A combinational circuit can be designed using only a. AND gates b. OR and X-NOR gates c. OR gates d. NAND gates 8 / 48 Category: Logic gates 8. 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 9 / 48 Category: Logic gates 9. X-OR and X-NOR gates can have how many inputs? a. 4 b. 1 c. 2 d. any number 10 / 48 Category: Logic gates 10. Which of the following gates cannot be used as an inverter? a. NAND b. NOR c. AND d. X-NOR 11 / 48 Category: Logic gates 11. The output of a gate is LOW when at least one of its inputs is HIGH. This is true for a. OR b. NAND c. NOR d. AND 12 / 48 Category: Logic gates 12. 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. inputs are left open d. all inputs are connected together 13 / 48 Category: Logic gates 13. 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 14 / 48 Category: Logic gates 14. The number of rows in the truth table of a 4-input gate is a. 4 b. 12 c. 8 d. 16 15 / 48 Category: Logic gates 15. 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 16 / 48 Category: Logic gates 16. NOT gates are to be added to the inputs of which gate to convert it to a NAND gate? a. NOT b. OR c. AND d. X-OR 17 / 48 Category: Logic gates 17. The output of a gate is HIGH when at least one of its inputs is LOW. It is true for a. NOR b. AND c. NAND d. OR 18 / 48 Category: Logic gates 18. How many NOR gates are.required to obtain AND operation? a. 2 b. 4 c. 3 d. 1 19 / 48 Category: Logic gates 19. A bubbled NAND gate is equivalent to a a. OR gate b. NAND gate c. NOR gate d. X-OR gate 20 / 48 Category: Logic gates 20. Which of the following gate is known as a coincidence detector? a. AND gate b. X-OR gate c. X-NOR gate d. NAND gate 21 / 48 Category: Logic gates 21. A gate is enabled when its enable input is at logic 0. The gate is a. AND b. NOR c. NONE OF THESE d. NAND 22 / 48 Category: Logic gates 22. What logic function is produced by adding inverters to the inputs of an AND gate? a. X-OR b. OR c. NOR d. NAND 23 / 48 Category: Logic gates 23. An X-OR gate gives a high output a. if it has even number of 0s b. if there are odd number of 1s c. for odd decimal value d. if the decimal value of digital word is even 24 / 48 Category: Logic gates 24. What logic function is produced by adding an inverter to each input and output of an AND gate ? a. OR b. NAND c. X-OR d. NO 25 / 48 Category: Logic gates 25. An all or nothing gate is the other name of a. X-NOR gate b. AND gate c. X-OR gate d. OR gate 26 / 48 Category: Logic gates 26. An any or all gate is the other name of a. X-NOR gate b. AND gate c. OR gate d. X-OR gate 27 / 48 Category: Logic gates 27. The output of a gate is HIGH if and only if all ts inputs are LOW. it is true for a. NOR b. NAND c. X-NOR d. X-OR 28 / 48 Category: Logic gates 28. An OR gate can be imagined as a. transistors connected in parallel b. transistors connected in series c. switches connected in parallel d. switches connected in series 29 / 48 Category: Logic gates 29. The output of a logic gate is 1 when all its inputs are at logic 0. The gate is either a. an AND or an X-NOR b. a NAND or a NOR c. an OR or a NAND d. an X-OR or an X-NOR 30 / 48 Category: Logic gates 30. A gate is inhibited when its inhibit input is at logic 1. The gate is a. OR b. NONE OF THESE c. AND d. NAND 31 / 48 Category: Logic gates 31. 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 32 / 48 Category: Logic gates 32. The output of a NAND gate is low a. only when at least one input is low b. only when all the inputs are high c. only when all the inputs are low d. only when at least one input is high 33 / 48 Category: Logic gates 33. What is the logic which controls a stair case light associated with two switches A and B locatedat the bottom and top of the stair case respectively? a. AND b. X-NOR c. OR d. X-OR 34 / 48 Category: Logic gates 34. A bubbled NOR gate is equivalent to a a. X-OR gate b. NAND gate c. AND gate d. NOR gate 35 / 48 Category: Logic gates 35. A combinational circuit can be designed using only a. OR and X-NOR gates b. AND gates c. OR gates d. NOR gates 36 / 48 Category: Logic gates 36. 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. NOR gates are sufficient to realize any logic function. d. AND and NOT gates are necessary and sufficient for realization of any logic function 37 / 48 Category: Logic gates 37. 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 38 / 48 Category: Logic gates 38. What logic function is produced by adding inverters to the inputs of an OR gate? a. NOR b. AND c. X-NOR d. NAND 39 / 48 Category: Logic gates 39. What is the minimum number of NOR gates required to realize an X-OR gate? a. 5 b. 4 c. 6 d. 3 40 / 48 Category: Logic gates 40. A gate is enabled when its enable input is at logic 1. The gate is a. NOR b. NAND c. OR d. NONE OF THESE 41 / 48 Category: Logic gates 41. What is the minimum number of NAND gates required to realize an X-OR gate? a. 3 b. 5 c. 6 d. 4 42 / 48 Category: Logic gates 42. Which of the following gates is known as anticoincidence detector? a. X-OR gate b. X-NOR gate c. AND gate d. OR gate 43 / 48 Category: Logic gates 43. The NOR gate can function as a NOT gate if a. all inputs are connected together b. inputs are left open c. one input is set to 0 d. one input is set to 1 44 / 48 Category: Logic gates 44. A bubbled NAND gate is equivalent to a a. NOR gate b. OR gate c. X-OR gate d. NAND gate 45 / 48 Category: Logic gates 45. A bubbled OR gate is equivalent to a a. NAND gate b. NOR gate c. X-OR gate d. AND gate 46 / 48 Category: Logic gates 46. 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 OR or an X-NOR c. an AND or a NOR d. a NAND or an X-OR 47 / 48 Category: Logic gates 47. The most suitable gate for comparing two bits is a. OR b. NAND c. X-OR d. AND 48 / 48 Category: Logic gates 48. An exclusive NOR gate is logically equivalent to a. NOT gate followed by a NOR gate b. complement of a NOR gate The c. X-OR gate followed by an inverter d. inverter followed by an X-OR gate Your score isThe average score is 7% LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
