Which of the following statements are true? I. A circuit that adds two bits,…
2013
Which of the following statements are true?
I. A circuit that adds two bits, producing a sum bit and a carry bit is called half adder.
II. A circuit that adds two bits, producing a sum bit and a carry bit is called full adder.
III. A circuit that adds two bits and a carry bit producing a sum bit and a carry bit is called full adder.
IV. A device that accepts the value of a Boolean variable as input and produces its complement is called an inverter.
- A.
I & II
- B.
II & III
- C.
I, II, III
- D.
I, III & IV
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Correct answer: D
Statement I is true because a half adder adds two bits to produce sum and carry outputs. Statement II is false as full adders require three inputs. Statement III correctly defines a full adder handling two bits and a carry bit. Statement IV is true since an inverter produces the complement of its input.
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