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Digital Computer Electronics - Section 4 Multiple Questions and Answers.
| 21. | In BCD addition, the value ________ is added to any invalid code group? | ||
| A. | 0110 | ||
| B. | 100110 | ||
| C. | 0U812 | ||
| D. | 010101 | ||
| 23. | The binary addition of 1 + 1 = ________.? | ||
| A. | sum = 1 carry = 1 | ||
| B. | sum = 0 carry = 0 | ||
| C. | sum = 1 carry = 0 | ||
| D. | sum = 0 carry = 1 | ||
| 24. | A 74HC283 can be used to implement a(n) ________ adder? | ||
| A. | 4-bit BCD | ||
| B. | 8-bit BCD | ||
| C. | 4-bit full | ||
| D. | 8-bit full | ||
| 25. | The two's complement of 00001111 is ________.? | ||
| A. | 11110001 | ||
| B. | 11111111 | ||
| C. | 11110000 | ||
| D. | 11110111 | ||
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