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. What logic function is produced by adding inverters to the inputs of an AND gate? a. X-OR b. NAND c. OR d. NOR 2 / 48 Category: Logic gates 2. A gate is disabled when its disable input is at logic 0. The gate is a. NONE OF THESE b. OR c. NOR d. AND 3 / 48 Category: Logic gates 3. Which of the following gate is known as a coincidence detector? a. X-OR gate b. NAND gate c. X-NOR gate d. AND gate 4 / 48 Category: Logic gates 4. A gate is enabled when its enable input is at logic 1. The gate is a. NOR b. OR c. NONE OF THESE d. NAND 5 / 48 Category: Logic gates 5. A gate is enabled when its enable input is at logic 0. The gate is a. NOR b. AND c. NONE OF THESE d. NAND 6 / 48 Category: Logic gates 6. X-OR and X-NOR gates can have how many inputs? a. any number b. 4 c. 2 d. 1 7 / 48 Category: Logic gates 7. 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. 2 d. 1 8 / 48 Category: Logic gates 8. A combinational circuit can be designed using only a. OR and X-NOR gates b. NOR gates c. OR gates d. AND gates 9 / 48 Category: Logic gates 9. How many NOR gates are.required to obtain AND operation? a. 2 b. 1 c. 3 d. 4 10 / 48 Category: Logic gates 10. A bubbled NAND gate is equivalent to a a. X-OR gate b. NOR gate c. NAND gate d. OR gate 11 / 48 Category: Logic gates 11. What is the minimum number of NOR gates required to realize an X-OR gate? a. 3 b. 5 c. 4 d. 6 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. OR b. NOR c. AND d. NAND 13 / 48 Category: Logic gates 13. An OR gate can be imagined as a. transistors connected in series b. transistors connected in parallel c. switches connected in series d. switches connected in parallel 14 / 48 Category: Logic gates 14. What is the minimum number of NAND gates required to realize an X-OR gate? a. 6 b. 5 c. 3 d. 4 15 / 48 Category: Logic gates 15. Which of the following gates is known as anticoincidence detector? a. X-NOR gate b. OR gate c. X-OR gate d. AND gate 16 / 48 Category: Logic gates 16. A bubbled NOR gate is equivalent to a a. AND gate b. X-OR gate c. NAND gate d. NOR gate 17 / 48 Category: Logic gates 17. What logic function is produced by adding an inverter to each input and output of an OR gate? a. X-OR b. AND c. NAND d. NOR 18 / 48 Category: Logic gates 18. Which of the following gates cannot be used as an inverter? a. AND b. NAND c. X-NOR d. NOR 19 / 48 Category: Logic gates 19. The output of a gate is LOW if and only if all its inputs are HIGH. it is true for a. NOR b. NAND c. AND d. X-NOR 20 / 48 Category: Logic gates 20. The most suitable gate for comparing two bits is a. OR b. X-OR c. AND d. NAND 21 / 48 Category: Logic gates 21. The output of a NAND gate is low a. only when all the inputs are low b. only when at least one input is low c. only when all the inputs are high d. only when at least one input is high 22 / 48 Category: Logic gates 22. 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 23 / 48 Category: Logic gates 23. Which of the following is known as a mod-2 adder? a. NAND gate b. X-NOR gate c. NOR gate d. X-OR gate 24 / 48 Category: Logic gates 24. The logic expression AB + Abar.Bbar can be implemented by giving the inputs A and B to a two input. a. X-OR gate b. NOR gate c. X-NOR gate d. NAND gate 25 / 48 Category: Logic gates 25. What logic function is produced by adding inverters to the inputs of an OR gate? a. X-NOR b. NOR c. NAND d. AND 26 / 48 Category: Logic gates 26. 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 27 / 48 Category: Logic gates 27. A bubbled NAND gate is equivalent to a a. NAND gate b. NOR gate c. X-OR gate d. OR gate 28 / 48 Category: Logic gates 28. The output of a gate is HIGH when at least one of its inputs is LOW. It is true for a. OR b. AND c. NAND d. NOR 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 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 31 / 48 Category: Logic gates 31. The number of rows in the truth table of a 4-input gate is a. 16 b. 8 c. 4 d. 12 32 / 48 Category: Logic gates 32. 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 33 / 48 Category: Logic gates 33. 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. X-NOR c. OR d. AND 34 / 48 Category: Logic gates 34. What logic function is produced by adding an inverter to each input and output of an AND gate ? a. OR b. NAND c. NO d. X-OR 35 / 48 Category: Logic gates 35. An any or all gate is the other name of a. AND gate b. X-NOR gate c. OR gate d. X-OR gate 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 at least one input is high d. only when all the inputs are low 37 / 48 Category: Logic gates 37. 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. AND and NOT gates are necessary and sufficient for realization of any logic function d. OR and NOT gates are necessary and sufficient for realization of any logic function. 38 / 48 Category: Logic gates 38. 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 NOR or an X-NOR d. a NAND or an X-OR 39 / 48 Category: Logic gates 39. An all or nothing gate is the other name of a. X-OR gate b. OR gate c. X-NOR gate d. AND gate 40 / 48 Category: Logic gates 40. A gate is inhibited when its inhibit input is at logic 1. The gate is a. OR b. NAND c. NONE OF THESE d. AND 41 / 48 Category: Logic gates 41. The output of a logic gate is 1 when all its inputs are at logic 1. The gate is either a. an AND or a NOR b. an OR or an X-OR c. a NAND or a NOR d. an AND or an OR 42 / 48 Category: Logic gates 42. An exclusive NOR gate is logically equivalent to a. X-OR gate followed by an inverter b. NOT gate followed by a NOR gate c. inverter followed by an X-OR gate d. complement of a NOR gate The 43 / 48 Category: Logic gates 43. The output of a gate is HIGH if and only if all ts inputs are LOW. it is true for a. NOR b. X-OR c. NAND d. X-NOR 44 / 48 Category: Logic gates 44. The NAND 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 0 d. one input is set to 1 45 / 48 Category: Logic gates 45. NOT gates are to be added to the inputs of which gate to convert it to a NOR gate? a. AND b. NAND c. OR d. X-NOR 46 / 48 Category: Logic gates 46. A bubbled OR gate is equivalent to a a. AND gate b. NOR gate c. NAND gate d. X-OR gate 47 / 48 Category: Logic gates 47. An X-OR gate gives a high output a. if there are odd number of 1s b. if it has even number of 0s c. for odd decimal value d. if the decimal value of digital word is even 48 / 48 Category: Uncategorized 48. A combinational circuit can be designed using only a. OR and X-NOR gates b. AND gates c. NAND gates d. OR gates Your score isThe average score is 10% LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
