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Midterm Test #1B Answers
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- Ian! D. Allen - idallen@idallen.ca - www.idallen.com

Test #1B Written Answer Section - Points: 25  (10 of 15%)

Note: To help you check your answers, I may give you the sum of the
digits in the answer.  For example, if the answer is supposed to be
128.9 I may tell you that the "check" sum of digits is 20 (=1+2+8+9).

[Points: 1] Express the decimal prefix "giga" as a power of ten: 10**9

[Points: 1] Express the binary prefix "tera" as a power of two: 2**40

[Points: 2] Convert binary 001111111101101101110101100 to hexadecimal: 1fedbac

[Points: 2] Convert unsigned octal 277 to decimal: 10111111 -> 191

[Points: 2] Convert hexadecimal EE5E to octal: 167136

[Points: 3] Convert the two's complement representation 16-bit
hexadecimal number EE5E to decimal.  (Check: the sum of the digits in
the answer is 14 decimal): --> 11A1 -> 11A2 -> -4514

[Points: 2] Convert the two's complement representation 16-bit
hexadecimal number 11A1 to decimal.  (Check: the sum of the digits in
the answer is 13 decimal): 4513

[Points: 2] Convert the decimal fraction 0.1875 to binary: 0.0011

[Points: 2] Convert decimal 133 to unsigned 8-bit binary: 10000101

[Points: 3] Convert decimal -122 to two's complement 8-bit binary:
01111010 -> 10000101 -> 10000110  (134 unsigned)

[Points: 5] Convert 64.1875 to IEEE 754 single-precision floating-point
and express the result in hexadecimal. (Check: the sum of the digits in
the answer is 20 decimal): 42806000