26. Which of the following is the primary advantage of using the BCD code instead of straight binary coding?
(a) Fewer bits are required to represent a decimal number with the BCD code.
(b) The relative ease of converting to and from decimal.
(c) BCD codes are easily converted to hexadecimal codes.
(d) BCD codes are easily converted to straight binary codes.
27. How many BCD code bits and how many straight binary bits would be required to represent the decimal number 643?
(a) 12 BCD, 12 binary
(b) 12 BCD, 10 binary
(c) 12 BCD, 9 binary
(d) 16 BCD, 9 binary
28. Select one of the following statements that best describes the parity method of error detection.
(a) Parity checking is best suited for detecting single-bit in transmitted codes.
(b) Parity checking is not suitable for detecting single-bit in transmitted codes.
(c) Parity checking is capable of detecting and correcting in transmitted codes.
(d) Parity checking is best suited for detecting double-bit that occur during the transmission of codes from one location to another.
29. Alphanumeric codes should include as a minimum:
(a) the capacity to represent the alphabet upper- and lowercase characters and the decimal numbers in a straight binary format.
(b) the capacity to code all possible decimal numbers in a direct octal representation of BCD codes.
(c) the alphabet upper- and lowercase letters, the decimal digits, the seven punctuation marks, and other characters or symbols.
(d) the ability to represent decimal numbers greater than 12810 in a straight binary format.
30. Which of the following is an invalid BCD code?
(a) 0011
(b) 1101
(c) 0101
(d) 1001
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