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Digital Logic Circuits (DLC) MCQs | Page - 26

Dear candidates you will find MCQ questions of Digital Logic Circuits (DLC) here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

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Q. 251) If A and B are the inputs of a half adder, the carry is given by                      

(A) a and b
(B) a or b
(C) a xor b
(D) a ex-nor b
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Q. 252) Half-adders have a major limitation in that they cannot                      

(A) accept a carry bit from a present stage
(B) accept a carry bit from a next stage
(C) accept a carry bit from a previous stage
(D) accept a carry bit from the following stages
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Q. 253) The difference between half adder and full adder is                      

(A) half adder has two inputs while full adder has four inputs
(B) half adder has one output while full adder has two outputs
(C) half adder has two inputs while full adder has three inputs
(D) all of the mentioned
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Q. 254) If A, B and C are the inputs of a full adder then the sum is given by                      

(A) a and b and c
(B) a or b and c
(C) a xor b xor c
(D) a or b or c
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Q. 255) If A, B and C are the inputs of a full adder then the carry is given by                      

(A) a and b or (a or b) and c
(B) a or b or (a and b) c
(C) (a and b) or (a and b)c
(D) a xor b xor (a xor b) and c
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Q. 256) Half subtractor is used to perform subtraction of                        

(A) 2 bits
(B) 3 bits
(C) 4 bits
(D) 5 bits
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Q. 257) For subtracting 1 from 0, we use to take a from neighbouring bits.

(A) carry
(B) borrow
(C) input
(D) output
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Q. 258) How many outputs are required for the implementation of a subtractor?

(A) 1
(B) 2
(C) 3
(D) 4
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Q. 259) Let the input of a subtractor is A and B then what the output will be if A = B?

(A) 0
(B) 1
(C) a
(D) b
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Mr. Dubey • 51.47K Points
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Q. 260) Let A and B is the input of a subtractor then the output will be                        

(A) a xor b
(B) a and b
(C) a or b
(D) a exnor b
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