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