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