HomeElectronics Multiple choice question MCQ online testCombinational Logic Design MCQ {part2} Combinational Logic Design MCQ {part2} Leave a Comment / Electronics Multiple choice question MCQ online test Spread the love 0% 0 votes, 0 avg 6 Created on June 12, 2023Digital electronics Combinational Logic Design {part 2} 1 / 24 Category: Combinational Logic Design 1. A device whose inputs are decimal digits and/or alphabetic characters and whose outputs are the coded representations of those inputs is called a) an encoder b) a decimal converter c) a code converter d) a decode 2 / 24 Category: Combinational Logic Design 2. The minimum number of 2-input NAND/NOR gates required to realize a half-subtractor is a) 6 b) 4 c) 3 d) 5 3 / 24 Category: Combinational Logic Design 3. A full-adder can be realized using a) two half-adders, one OR gate b) two half-adders, two OR gates c) one half-adder, two OR gates d) two half-adders, one AND gate 4 / 24 Category: Combinational Logic Design 4. The difference output in a full-subtractor is the same as the a) sum output of a full-adder b) difference output of a half-subtractor c) sum output of a half-adder d) carry output of a full-adder 5 / 24 Category: Combinational Logic Design 5. How many full-adders are required to construct an m-bit parallel adder? a) m-1 b) m/2 c) m+ 1 d) m 6 / 24 Category: Combinational Logic Design 6. In a digital system BCD arithmetic is preferred to normal binary arithmetic because a) BCD arithmetic circuits are less expensive than binary arithmetic circuits b) of ease of operation when input is in BCD format and the output display is decimal c) BCD arithmetic circuits are faster than binary arithmetic circuits d) BCD arithmetic circuits are simpler than binary arithmetic circuits 7 / 24 Category: Combinational Logic Design 7. In which of the following adder circuits is the carry ripple delay eliminated? a) full-adder b) carry-look-ahead adder c) half-adder d) parallel adder 8 / 24 Category: Combinational Logic Design 8. BCD subtraction is performed by using a) S’s complement representation b) 1’s complement representation c) 9’s complement representation d) 2’s complement representation 9 / 24 Category: Combinational Logic Design 9. How many inputs and outputs does a full-adder have? a) two inputs, one output b) three inputs, two outputs c) two inputs, two outputs d) two inputs, three outputs 10 / 24 Category: Combinational Logic Design 10. A parallel adder in which the carry-out of each full-adder is the carry-in to the next significant digit adder is called a a) ripple carry adder b) parallel carry adder c) serial carry adder d) look-ahead-carry adder 11 / 24 Category: Combinational Logic Design 11. Parallel adders are a) combinational logic circuits b) Both c) sequential logic circuits d) none of these 12 / 24 Category: Combinational Logic Design 12. A serial adder requires only one a) multiplexer b) counter c) full-adde d) half-adder 13 / 24 Category: Combinational Logic Design 13. Which logic gate is a basic comparator? a) X-NOR gate b) NOR gate c) NAND gate d) X-OR gate 14 / 24 Category: Combinational Logic Design 14. The minimum number of 2-input NOR gates required to realize a full-subtractor is a) 10 b) 9 c) 12 d) 8 15 / 24 Category: Combinational Logic Design 15. In digital systems subtraction is performed a) using half-adders b) using half-subtractors c) by none of these d) using adders with 1’s complement representation of negative numbers 16 / 24 Category: Combinational Logic Design 16. How many inputs and outputs does a full-subtractor circuit have? a) two inputs, three outputs b) three inputs, two outputs c) two inputs, one output d) two inputs, two outputs 17 / 24 Category: Combinational Logic Design 17. To secure a higher speed of addition, which of the following is the preferred solution? a) adder with a look-ahead-carry b) parallel adder c) full-adder d) serial adder 18 / 24 Category: Combinational Logic Design 18. Which of the following logic circuits accepts two binary digits on inputs, and produces two binary digits, a sum bit and a carry bit on its outputs? a) half-adder b) parallel adder c) full-adder d) serial adder 19 / 24 Category: Combinational Logic Design 19. A logic circuit that responds to just one input, in accordance with some priority system, among those that may be simultaneously high is called a) an encode b) a priority decoder c) a priority encoder d) a decoder 20 / 24 Category: Combinational Logic Design 20. In BCD addition, 0110 is required to be added to the sum for getting the correct result, if a) none of these b) the suni of two BCD numbers is not a valid BCD number or a carry is produced c) the sum of two BCD numbers is not a valid BCD number d) a carry is produced 21 / 24 Category: Combinational Logic Design 21. The logic gate used in parity checkers is a) X-NOR gate b) X-OR gate c) NOR gate d) NAND gate 22 / 24 Category: Combinational Logic Design 22. The adder preferred for applications where circuit minimization is more important than speedis a) half-adder b) serial adder c) full-adder d) parallel adder 23 / 24 Category: Combinational Logic Design 23. The minimum number of 2-input NAND/NOR gates required to realize a half-adder is a) 6 b) 4 c) 3 d) 5 24 / 24 Category: Combinational Logic Design 24. The minimum number of 2-input NAND gates required to realize a full adder/full-subtractor is a) 4 b) 6 c) 3 d) 5 Your score isThe average score is 11% LinkedIn Facebook VKontakte 0% Restart quiz Exit Thank you Send feedback Spread the love
