Computer-Organization
October 14, 2023Digital-Logic-Design
October 14, 2023Digital-Logic-Design
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Question 525
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An example of a self complementing code is :
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8421 code
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Gray code
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Excess-3 code
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7421 code
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Question 525 Explanation:
→ Excess-3 code is also called Self-Complementing Code. Because 1’s complement of excess-3 number is equivalent to 9’s complement of corresponding decimal digit.
→ In excess-3 code, each of the 4-bit number represents decimal digit which is 3 less than actual decimal digit. So the bits have no fixed weight.
→ Excess-3 code is neither CRC nor Algebraic Code which are used for error detection and/or correction.
→ In excess-3 code, each of the 4-bit number represents decimal digit which is 3 less than actual decimal digit. So the bits have no fixed weight.
→ Excess-3 code is neither CRC nor Algebraic Code which are used for error detection and/or correction.
Correct Answer: C
Question 525 Explanation:
→ Excess-3 code is also called Self-Complementing Code. Because 1’s complement of excess-3 number is equivalent to 9’s complement of corresponding decimal digit.
→ In excess-3 code, each of the 4-bit number represents decimal digit which is 3 less than actual decimal digit. So the bits have no fixed weight.
→ Excess-3 code is neither CRC nor Algebraic Code which are used for error detection and/or correction.
→ In excess-3 code, each of the 4-bit number represents decimal digit which is 3 less than actual decimal digit. So the bits have no fixed weight.
→ Excess-3 code is neither CRC nor Algebraic Code which are used for error detection and/or correction.
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