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