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