| 12. | What is the 1's complement of 0000 1111 0010 1101 number? |
| Discuss |
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Answer: (b).1111 0000 1101 0010
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| 13. | The number of binary bits required to represent a hexadecimal digit is |
| Discuss |
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Answer: (b).4
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| 14. | A binary adder is a logic circuit that can add _____ binary numbers at a time. |
| Discuss |
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Answer: (d).Two
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| 15. | A 2's-complement adder-subtracter can add or subtract binary numbers. Sign-magnitude numbers represent _____ decimal numbers, and 2's complements stand for _____ decimal numbers. |
| Discuss |
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Answer: (c).positive, negative
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| 16. | The main advantage of hexadecimal numbers is the case of conversion from hexadecimal to _____ and vice versa. |
| Discuss |
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Answer: (b).binary
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| 17. | A logic circuit which is used to change a BCD number into an equivalent decimal number is |
| Discuss |
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Answer: (a).decoder
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| 18. | The digits used in a binary number system are _____ and _____. |
| Discuss |
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Answer: (b).0 and 1
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| 19. | The 1's compliment of binary number 11010 is: |
| Discuss |
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Answer: (a).00101
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| 20. | The excess-3 code of decimal 7 is represented by |
| Discuss |
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Answer: (d).1010
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