Computer-Organization
October 14, 2023UGC NET CS 2006 June-Paper-2
October 14, 2023UGC NET CS 2006 Dec-paper-2
| Question 7 |
An example of a self complementing code is :
| 8421 code | |
| Gray code | |
| Excess-3 code | |
| 7421 code |
Question 7 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 7 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.