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