ComputerOrganization
October 14, 2023DigitalLogicDesign
October 14, 2023DigitalLogicDesign
Question 525

An example of a self complementing code is :
8421 code


Gray code


Excess3 code


7421 code

Question 525 Explanation:
→ Excess3 code is also called SelfComplementing Code. Because 1’s complement of excess3 number is equivalent to 9’s complement of corresponding decimal digit.
→ In excess3 code, each of the 4bit number represents decimal digit which is 3 less than actual decimal digit. So the bits have no fixed weight.
→ Excess3 code is neither CRC nor Algebraic Code which are used for error detection and/or correction.
→ In excess3 code, each of the 4bit number represents decimal digit which is 3 less than actual decimal digit. So the bits have no fixed weight.
→ Excess3 code is neither CRC nor Algebraic Code which are used for error detection and/or correction.
Correct Answer: C
Question 525 Explanation:
→ Excess3 code is also called SelfComplementing Code. Because 1’s complement of excess3 number is equivalent to 9’s complement of corresponding decimal digit.
→ In excess3 code, each of the 4bit number represents decimal digit which is 3 less than actual decimal digit. So the bits have no fixed weight.
→ Excess3 code is neither CRC nor Algebraic Code which are used for error detection and/or correction.
→ In excess3 code, each of the 4bit number represents decimal digit which is 3 less than actual decimal digit. So the bits have no fixed weight.
→ Excess3 code is neither CRC nor Algebraic Code which are used for error detection and/or correction.
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