141. In the decimal number 481, the powers-of-10 weight of the digit 4 is ________.
(a) 400
(b) 102
(c) 104
(d) 100
142. The decimal number –128 is represented in the signed 2’s complement system as ________.
(a) 1111 1110
(b) 0111 1111
(c) 1000 0000
(d) 1111 1111
143. The 2’s complement of the binary number 1000 is ________.
(a) 111
(b) 0110
(c) 1110
(d) 1000
144. The decimal fraction 1/4 can be written in binary as________.
(a) 0.010
(b) 0.100
(c) 0.110
(d) 0.011
145. The column weight of the “1” in the hexadecimal number 1AB is ________.
(a) 64
(b) 256
(c) 512
(d) 1024
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51. The decimal number for octal 748 is ________. (a) 74 (b) 60 (c) 22 (d) 62 52. The octal number for binary 1101110101110110 is ________. (a) 6545218 (b) 5565618 (c) 1566568 (d) 1565668 53. The binary number for F3A16 is ________. (a) 111100111010 (b) 111100111110 (c) 000000111010 (d) 000011000100 54. The binary number 11101011000111010 can be written in hexadecimal as ________. (a) DD63A16 (b) 1D63A16 (c) 1D54A16 (d) 1D63116 55. The binary number 101110101111010 can be written in octal as ________. (a) 515628 (b) 565778 (c) 656278 (d) 565728 56. Determine the decimal equivalent of the signed binary number 11110100 in 1's complement. (a) 116 (b) –12 (c) 11 (d) 128 57. Express the decimal number –37 as an 8-bit number in sign-magnitude. (a) 10100101 (b) 00100101 (c) 11011000 (d) 11010001 58. The 2's complement of 11100111 is ________. (a) 11100110 (b) 00011001 (c) 00011000 (d) 00011010 59. The 1's complement of 10011101 is ________. (a) 01100010 (b) 10011110 (c) 01100001 (d) 01100011 60. The difference of 111 – 001 equals ________. (a) 100 (b) 111 (c) 001 (d) 110 61. The sum of 11101 + 10111 equals ________. (a) 110011 (b) 100001 (c) 110100 (d) 100100 62. The…- 51. Decimal 474 is ________ in BCD. (a) 0100 0111 0100 (b) 0100 1011 0101 (c) 0100 1001 0011 (d) 0110 1011 1001 52. The largest BCD number that can be represented with four binary bits is ________. (a) 9 (b) 10 (c) 15 (d) 16 53. The decimal equivalent of the BCD number 1010 is ________. (a) 8 (b) 10 (c) 12 (d) invalid
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