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. 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 2 / 48 Category: Logic gates 2. Which of the following is known as a mod-2 adder? a. NAND gate b. X-OR gate c. X-NOR gate d. NOR gate 3 / 48 Category: Logic gates 3. What logic function is produced by adding an inverter to each input and output of an AND gate ? a. NO b. X-OR c. OR d. NAND 4 / 48 Category: Logic gates 4. Which of the following gates is known as anticoincidence detector? a. AND gate b. X-NOR gate c. X-OR gate d. OR gate 5 / 48 Category: Logic gates 5. 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. NAND d. AND 6 / 48 Category: Logic gates 6. A gate is enabled when its enable input is at logic 1. The gate is a. OR b. NAND c. NONE OF THESE d. NOR 7 / 48 Category: Logic gates 7. The most suitable gate for comparing two bits is a. AND b. OR c. NAND d. X-OR 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 gate is disabled when its disable input is at logic 0. The gate is a. OR b. NONE OF THESE c. AND d. NOR 10 / 48 Category: Logic gates 10. 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 11 / 48 Category: Logic gates 11. An all or nothing gate is the other name of a. OR gate b. AND gate c. X-OR gate d. X-NOR gate 12 / 48 Category: Logic gates 12. 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. AND d. NAND 13 / 48 Category: Logic gates 13. Which of the following statements is true? a. NOR gates are sufficient to realize any logic function. b. AND and NOT gates are necessary and sufficient for realization of any logic function c. OR and NOT gates are necessary and sufficient for realization of any logic function. d. NAND gates are not sufficient to realize any logic function 14 / 48 Category: Logic gates 14. An OR gate can be imagined as a. switches connected in series b. transistors connected in series c. switches connected in parallel d. transistors connected in parallel 15 / 48 Category: Logic gates 15. What logic function is produced by adding an inverter to each input and output of an OR gate? a. NOR b. AND c. X-OR d. NAND 16 / 48 Category: Logic gates 16. An any or all gate is the other name of a. OR gate b. X-OR gate c. X-NOR gate d. AND gate 17 / 48 Category: Logic gates 17. What is the minimum number of NAND gates required to realize an X-OR gate? a. 5 b. 3 c. 6 d. 4 18 / 48 Category: Logic gates 18. A bubbled NOR gate is equivalent to a a. NOR gate b. AND gate c. X-OR gate d. NAND gate 19 / 48 Category: Logic gates 19. The logic expression AB + Abar.Bbar can be implemented by giving the inputs A and B to a two input. a. NOR gate b. X-OR gate c. NAND gate d. X-NOR gate 20 / 48 Category: Logic gates 20. A bubbled NAND gate is equivalent to a a. OR gate b. X-OR gate c. NAND gate d. NOR gate 21 / 48 Category: Logic gates 21. 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. an AND or an X-NOR c. an X-OR or an X-NOR d. a NAND or a NOR 22 / 48 Category: Logic gates 22. X-OR and X-NOR gates can have how many inputs? a. 1 b. 4 c. any number d. 2 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. NOR d. AND 24 / 48 Category: Uncategorized 24. A combinational circuit can be designed using only a. NAND gates b. OR gates c. OR and X-NOR gates d. AND gates 25 / 48 Category: Logic gates 25. What logic function is produced by adding inverters to the inputs of an OR gate? a. NOR b. X-NOR c. NAND d. AND 26 / 48 Category: Logic gates 26. An AND gate can be imagined as a. switches connected in series b. transistors connected in parallel c. switches connected in parallel d. transistors connected in series 27 / 48 Category: Logic gates 27. An X-OR gate gives a high output a. for odd decimal value b. if it has even number of 0s c. if there are odd number of 1s d. if the decimal value of digital word is even 28 / 48 Category: Logic gates 28. What is the minimum number of NOR gates required to realize an X-OR gate? a. 3 b. 6 c. 5 d. 4 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. AND b. X-OR c. OR d. NOT 30 / 48 Category: Logic gates 30. The number of rows in the truth table of a 4-input gate is a. 12 b. 8 c. 16 d. 4 31 / 48 Category: Logic gates 31. A gate is enabled when its enable input is at logic 0. The gate is a. NOR b. NAND c. NONE OF THESE d. AND 32 / 48 Category: Logic gates 32. A bubbled OR gate is equivalent to a a. AND gate b. NOR gate c. NAND gate d. X-OR gate 33 / 48 Category: Logic gates 33. The output of a gate is HIGH if and only if all ts inputs are LOW. it is true for a. NOR b. X-NOR c. X-OR d. NAND 34 / 48 Category: Logic gates 34. The NAND gate can function as a NOT gate if a. one input is set to 0 b. one input is set to 1 c. all inputs are connected together d. inputs are left open 35 / 48 Category: Logic gates 35. A combinational circuit can be designed using only a. OR gates b. OR and X-NOR gates c. NOR gates d. AND gates 36 / 48 Category: Logic gates 36. 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 37 / 48 Category: Logic gates 37. 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-NOR b. a NAND or an X-OR c. an AND or a NOR d. an OR or an X-OR 38 / 48 Category: Logic gates 38. Which of the following gate is known as a coincidence detector? a. AND gate b. X-OR gate c. X-NOR gate d. NAND gate 39 / 48 Category: Logic gates 39. What logic function is produced by adding inverters to the inputs of an AND gate? a. NAND b. X-OR c. OR d. NOR 40 / 48 Category: Logic gates 40. The NOR gate can function as a NOT gate if a. one input is set to 0 b. one input is set to 1 c. inputs are left open d. all inputs are connected together 41 / 48 Category: Logic gates 41. A bubbled NAND gate is equivalent to a a. OR gate b. X-OR gate c. NOR gate d. NAND gate 42 / 48 Category: Logic gates 42. What is the minimum number of two-input NAND gates used to perform the function of 2-input OR gate? a. 3 b. 4 c. 1 d. 2 43 / 48 Category: Logic gates 43. 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. OR d. NAND 44 / 48 Category: Logic gates 44. An exclusive NOR gate is logically equivalent to a. complement of a NOR gate The b. inverter followed by an X-OR gate c. NOT gate followed by a NOR gate d. X-OR gate followed by an inverter 45 / 48 Category: Logic gates 45. 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-OR b. OR c. AND d. X-NOR 46 / 48 Category: Logic gates 46. 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 47 / 48 Category: Logic gates 47. A gate is inhibited when its inhibit input is at logic 1. The gate is a. AND b. NONE OF THESE c. NAND d. OR 48 / 48 Category: Logic gates 48. Which of the following gates cannot be used as an inverter? a. AND b. NOR c. NAND d. X-NOR Your score isThe average score is 10% LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
