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