ECE 190 Midterm Exam 1
Spring 2011
Monday, February 14, 2011
Name:
NetID:
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Be sure your exam booklet has 5 pages.
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Do not tear the exam booklet apart.
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Write your name at the top of each page.
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This is a closed book exam.
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You may not use a calculator.
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You are allowed one handwritten 8.5 x 11" sheet of notes.
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Absolutely no interaction between students is allowed.
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Be sure to clearly indicate any assumptions that you make.
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Don’t panic, and good luck!
Problem 1
10 points
_______________________________
Problem 2
5 points
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Problem 3
10 points
_______________________________
Problem 4
5 points
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Total
30 points
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Page: 2
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___________________________________________
Problem 1 (10 points): Binary representation
Part A
(2 points):
What range of decimal numbers can be represented using 7 bits in each 2’s
complement, 1’s complement, and unsigned binary representations?
2’s complement:
_____________________
1’s complement:
_____________________
Unsigned binary:
_____________________
Part B
(2 points):
Convert decimal number 64 into signed magnitude, 2’s complement, and 1’s
complement binary representations using the minimum number of bits.
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 Spring '08
 Hutchinson
 Decimal, 32bit, 7 bits, 2 bits

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