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 A bubbled OR gate is equivalent to a a. NAND gate b. AND gate c. NOR gate d. X-OR gate 2 / 48 Category: Logic gates 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 3 / 48 Category: Logic gates Which of the following gate is known as a coincidence detector? a. AND gate b. X-NOR gate c. X-OR gate d. NAND gate 4 / 48 Category: Logic gates How many NOR gates are.required to obtain AND operation? a. 1 b. 3 c. 4 d. 2 5 / 48 Category: Logic gates 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 6 / 48 Category: Logic gates X-OR and X-NOR gates can have how many inputs? a. any number b. 2 c. 1 d. 4 7 / 48 Category: Logic gates The NOR gate can function as a NOT gate if a. all inputs are connected together b. one input is set to 0 c. inputs are left open d. one input is set to 1 8 / 48 Category: Logic gates An all or nothing gate is the other name of a. X-NOR gate b. X-OR gate c. AND gate d. OR gate 9 / 48 Category: Logic gates 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. if the decimal value of digital word is even d. for odd decimal value 10 / 48 Category: Logic gates What logic function is produced by adding an inverter to each input and output of an AND gate ? a. OR b. NAND c. X-OR d. NO 11 / 48 Category: Logic gates What logic function is produced by adding an inverter to each input and output of an OR gate? a. AND b. X-OR c. NOR d. NAND 12 / 48 Category: Logic gates The output of a gate is HIGH when at least one of its inputs is LOW. It is true for a. NOR b. AND c. OR d. NAND 13 / 48 Category: Logic gates What is the minimum number of NAND gates required to realize an X-OR gate? a. 5 b. 3 c. 6 d. 4 14 / 48 Category: Logic gates A bubbled NOR gate is equivalent to a a. X-OR gate b. AND gate c. NOR gate d. NAND gate 15 / 48 Category: Logic gates An exclusive NOR gate is logically equivalent to a. complement of a NOR gate The b. X-OR gate followed by an inverter c. inverter followed by an X-OR gate d. NOT gate followed by a NOR gate 16 / 48 Category: Logic gates What is the minimum number of NOR gates required to realize an X-OR gate? a. 3 b. 6 c. 5 d. 4 17 / 48 Category: Logic gates 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. 18 / 48 Category: Logic gates 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 19 / 48 Category: Logic gates The NAND gate can function as a NOT gate if a. one input is set to 1 b. inputs are left open c. all inputs are connected together d. one input is set to 0 20 / 48 Category: Logic gates The most suitable gate for comparing two bits is a. X-OR b. OR c. AND d. NAND 21 / 48 Category: Logic gates Which of the following gates cannot be used as an inverter? a. NAND b. AND c. NOR d. X-NOR 22 / 48 Category: Logic gates 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 high c. only when at least one input is high d. only when all the inputs are low 23 / 48 Category: Logic gates The output of a gate is HIGH if and only if all ts inputs are LOW. it is true for a. X-NOR b. NOR c. X-OR d. NAND 24 / 48 Category: Logic gates The number of rows in the truth table of a 4-input gate is a. 12 b. 8 c. 16 d. 4 25 / 48 Category: Logic gates 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-OR gate d. X-NOR gate 26 / 48 Category: Logic gates 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. an OR or an X-OR c. a NOR or an X-NOR d. NAND or an AND 27 / 48 Category: Logic gates Which of the following gates is known as anticoincidence detector? a. AND gate b. X-OR gate c. OR gate d. X-NOR gate 28 / 48 Category: Logic gates A gate is enabled when its enable input is at logic 0. The gate is a. AND b. NAND c. NOR d. NONE OF THESE 29 / 48 Category: Logic gates A gate is disabled when its disable input is at logic 0. The gate is a. NONE OF THESE b. AND c. NOR d. OR 30 / 48 Category: Logic gates 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 31 / 48 Category: Logic gates A gate is inhibited when its inhibit input is at logic 1. The gate is a. NONE OF THESE b. NAND c. OR d. AND 32 / 48 Category: Logic gates What logic function is produced by adding inverters to the inputs of an AND gate? a. X-OR b. NAND c. NOR d. OR 33 / 48 Category: Logic gates NOT gates are to be added to the inputs of which gate to convert it to a NAND gate? a. AND b. OR c. NOT d. X-OR 34 / 48 Category: Logic gates 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. a NAND or a NOR c. an AND or an X-NOR d. an OR or a NAND 35 / 48 Category: Logic gates An any or all gate is the other name of a. X-NOR gate b. X-OR gate c. OR gate d. AND gate 36 / 48 Category: Logic gates What logic function is produced by adding inverters to the inputs of an OR gate? a. AND b. NOR c. X-NOR d. NAND 37 / 48 Category: Logic gates A gate is enabled when its enable input is at logic 1. The gate is a. NONE OF THESE b. NOR c. OR d. NAND 38 / 48 Category: Logic gates A combinational circuit can be designed using only a. NOR gates b. AND gates c. OR and X-NOR gates d. OR gates 39 / 48 Category: Logic gates An AND gate can be imagined as a. switches connected in parallel b. switches connected in series c. transistors connected in parallel d. transistors connected in series 40 / 48 Category: Logic gates The output of a gate is LOW if and only if all its inputs are HIGH. it is true for a. NAND b. AND c. X-NOR d. NOR 41 / 48 Category: Logic gates The output of a gate is LOW when at least one of its inputs is HIGH. This is true for a. NAND b. NOR c. OR d. AND 42 / 48 Category: Logic gates 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 AND or a NOR c. an OR or an X-NOR d. an OR or an X-OR 43 / 48 Category: Logic gates A bubbled NAND gate is equivalent to a a. OR gate b. X-OR gate c. NAND gate d. NOR gate 44 / 48 Category: Uncategorized A combinational circuit can be designed using only a. OR gates b. AND gates c. OR and X-NOR gates d. NAND gates 45 / 48 Category: Logic gates A bubbled NAND gate is equivalent to a a. X-OR gate b. OR gate c. NAND gate d. NOR gate 46 / 48 Category: Logic gates 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 47 / 48 Category: Logic gates 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 48 / 48 Category: Logic gates NOT gates are to be added to the inputs of which gate to convert it to a NOR gate? a. AND b. X-NOR c. OR d. NAND Your score isThe average score is 10% LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
