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: Uncategorized 1. A combinational circuit can be designed using only a. AND gates b. OR gates c. NAND gates d. OR and X-NOR gates 2 / 48 Category: Logic gates 2. An X-OR gate gives a high output a. for odd decimal value b. if the decimal value of digital word is even c. if it has even number of 0s d. if there are odd number of 1s 3 / 48 Category: Logic gates 3. NOT gates are to be added to the inputs of which gate to convert it to a NOR gate? a. X-NOR b. AND c. NAND d. OR 4 / 48 Category: Logic gates 4. The output of a NAND gate is low a. only when at least one input is high b. only when at least one input is low c. only when all the inputs are low d. only when all the inputs are high 5 / 48 Category: Logic gates 5. The output of a logic gate is 0 when all its inputs are at logic 1. The gate is either a. an OR or an X-OR b. NAND or an AND c. a NAND or an X-OR d. a NOR or an X-NOR 6 / 48 Category: Logic gates 6. The output of a logic gate is 1 when all its inputs are at logic 0. The gate is either a. an AND or an X-NOR b. an OR or a NAND c. an X-OR or an X-NOR d. a NAND or a NOR 7 / 48 Category: Logic gates 7. Which of the following is known as a mod-2 adder? a. NOR gate b. X-NOR gate c. NAND gate d. X-OR gate 8 / 48 Category: Logic gates 8. A gate is enabled when its enable input is at logic 0. The gate is a. NAND b. NONE OF THESE c. AND d. NOR 9 / 48 Category: Logic gates 9. The output of a gate is LOW when at least one of its inputs is HIGH. This is true for a. OR b. NOR c. NAND d. AND 10 / 48 Category: Logic gates 10. An any or all gate is the other name of a. X-OR gate b. X-NOR gate c. OR gate d. AND gate 11 / 48 Category: Logic gates 11. A bubbled NAND gate is equivalent to a a. OR gate b. X-OR gate c. NOR gate d. NAND gate 12 / 48 Category: Logic gates 12. Which of the following gates is known as anticoincidence detector? a. X-OR gate b. AND gate c. X-NOR gate d. OR gate 13 / 48 Category: Logic gates 13. 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 14 / 48 Category: Logic gates 14. A gate is enabled when its enable input is at logic 1. The gate is a. OR b. NONE OF THESE c. NOR d. NAND 15 / 48 Category: Logic gates 15. A gate is disabled when its disable input is at logic 0. The gate is a. OR b. NOR c. AND d. NONE OF THESE 16 / 48 Category: Logic gates 16. An all or nothing gate is the other name of a. X-NOR gate b. X-OR gate c. AND gate d. OR gate 17 / 48 Category: Logic gates 17. An OR gate can be imagined as a. transistors connected in series b. switches connected in series c. switches connected in parallel d. transistors connected in parallel 18 / 48 Category: Logic gates 18. Which of the following gate is known as a coincidence detector? a. NAND gate b. AND gate c. X-NOR gate d. X-OR gate 19 / 48 Category: Logic gates 19. 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 20 / 48 Category: Logic gates 20. A bubbled NOR gate is equivalent to a a. NOR gate b. X-OR gate c. AND gate d. NAND gate 21 / 48 Category: Logic gates 21. What logic function is produced by adding an inverter to each input and output of an AND gate ? a. OR b. X-OR c. NO d. NAND 22 / 48 Category: Logic gates 22. The most suitable gate for comparing two bits is a. NAND b. X-OR c. AND d. OR 23 / 48 Category: Logic gates 23. The output of a gate is HIGH when at least one of its inputs is LOW. It is true for a. OR b. NAND c. AND d. NOR 24 / 48 Category: Logic gates 24. What logic function is produced by adding inverters to the inputs of an OR gate? a. AND b. NOR c. NAND d. X-NOR 25 / 48 Category: Logic gates 25. X-OR and X-NOR gates can have how many inputs? a. 4 b. 2 c. any number d. 1 26 / 48 Category: Logic gates 26. Which of the following statements is true? a. OR and NOT gates are necessary and sufficient for realization of any logic function. b. AND 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 27 / 48 Category: Logic gates 27. A combinational circuit can be designed using only a. OR and X-NOR gates b. OR gates c. AND gates d. NOR gates 28 / 48 Category: Logic gates 28. A gate is inhibited when its inhibit input is at logic 1. The gate is a. NAND b. NONE OF THESE c. OR 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 NAND gate? a. OR b. X-OR c. NOT d. AND 30 / 48 Category: Logic gates 30. 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-NOR gate d. X-OR gate 31 / 48 Category: Logic gates 31. A bubbled NAND gate is equivalent to a a. OR gate b. NOR gate c. X-OR gate d. NAND gate 32 / 48 Category: Logic gates 32. A bubbled OR gate is equivalent to a a. X-OR gate b. AND gate c. NAND gate d. NOR gate 33 / 48 Category: Logic gates 33. What is the minimum number of two-input NAND gates used to perform the function of 2-input OR gate? a. 1 b. 2 c. 4 d. 3 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. The output of a NOR gate is high a. (d) 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 36 / 48 Category: Logic gates 36. Which of the following gates cannot be used as an inverter? a. X-NOR b. AND c. NAND d. NOR 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-OR b. X-NOR c. NAND d. NOR 38 / 48 Category: Logic gates 38. 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. a NAND or a NOR d. an AND or a NOR 39 / 48 Category: Logic gates 39. What logic function is produced by adding an inverter to each input and output of an OR gate? a. NOR b. X-OR c. AND d. NAND 40 / 48 Category: Logic gates 40. What is the minimum number of NOR gates required to realize an X-OR gate? a. 3 b. 5 c. 4 d. 6 41 / 48 Category: Logic gates 41. What is the minimum number of NAND gates required to realize an X-OR gate? a. 5 b. 3 c. 6 d. 4 42 / 48 Category: Logic gates 42. The number of rows in the truth table of a 4-input gate is a. 16 b. 8 c. 4 d. 12 43 / 48 Category: Logic gates 43. 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. X-NOR b. X-OR c. AND d. OR 44 / 48 Category: Logic gates 44. The NOR gate can function as a NOT gate if a. one input is set to 0 b. inputs are left open c. one input is set to 1 d. all inputs are connected together 45 / 48 Category: Logic gates 45. What logic function is produced by adding inverters to the inputs of an AND gate? a. NOR b. OR c. X-OR d. NAND 46 / 48 Category: Logic gates 46. How many NOR gates are.required to obtain AND operation? a. 1 b. 4 c. 3 d. 2 47 / 48 Category: Logic gates 47. 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 48 / 48 Category: Logic gates 48. An AND 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 Your score isThe average score is 10% LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
