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exam1-fall07-soln

# exam1-fall07-soln - ECE 109-001 NC State University Exam...

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AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA ECE 109-001 Name:____________________________________________ NC State University Exam 1(A): 26 September 2007 1 Exam 1 (Version A) This is a closed book and closed notes test. You are not allowed to have anything on your desk other than pencil and paper during the test; this includes calculators or electronic assistance of any kind. Failure to abide by this policy will result in a zero on the exam and will be treated as a violation of the NCSU Code of Student Conduct. You must show all of your work on this exam. You will not be allowed to turn in additional sheets of paper. If you need more space for a problem use the back of the same page . Write your name on every sheet of this exam. Read and sign the following statement. Failure to sign the statement will result in a zero on the exam. I have neither given nor received unauthorized assistance on this test. I have notified the proctor of any violations of the above policies. Signature: __________________________________________________

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AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA ECE 109-001 Name:____________________________________________ NC State University Exam 1(A): 26 September 2007 2 Question Points Score 1 16 2 12 3 16 4 16 5 16 6 12 7 12 TOTAL 100
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA ECE 109-001 Name:____________________________________________ NC State University Exam 1(A): 26 September 2007 3 1. (16 points) Fill in the missing representations for the following numbers. You must show your work to get full credit. If a number cannot be represented using a particular scheme, write “none” and explain why no representation is possible. decimal 8-bit two’s complement 8-bit sign-magnitude (a) 96 01100000 01100000 (b) -18 11101110 10010010 (c) -66 10111110 11000010 (d) 75 01001011 01001011 n 2 n 0 1 1 2 2 4 3 8 4 16 5 32 6 64 7 128 8 256 9 512 10 1024

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AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA ECE 109-001 Name:____________________________________________ NC State University Exam 1(A): 26 September 2007 4 2. (12 points) Design a state machine that computes the two’s complement of a binary number, one bit at a time.
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exam1-fall07-soln - ECE 109-001 NC State University Exam...

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