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Unformatted text preview: ECE 199 Exam I Spring 2004 Wednesday, February 25 th , 2004 x Be sure your exam booklet has 12 pages x Write your name at the top of each page x This is a closed book exam x You are allowed one handwritten 8.5 x 11 sheet of notes x Absolutely no interaction between students is allowed x Show all of your work x Be sure to clearly indicate any assumptions that you make x More challenging questions are marked with a *** x Don¡t panic, and good luck! Problem 1 20 points _______________________________ Problem 2 20 points _______________________________ Problem 3 20 points _______________________________ Problem 4 20 points _______________________________ Problem 5 20 points _______________________________ Total 100 points Name: Page 2 Name: ____________________________________________ Problem 1 (20 points): Short Answer Part A (5 points) : Convert the following numbers. 15 (from decimal to 8bit 2¡s complement) 11011001 (from 8bit 2¡s complement to decimal) Part B (5 points): Is the pair of functions ¢ 1, ¢ 2 together logically complete? Prove that your answer is correct. A B ¡ 1 ¡ 2 0 0 1 0 0 1 1 0 1 0 0 1 1 1 0 0 Page 3 Name: ____________________________________________ Part C (5 points): There are now slightly fewer than 1.1001 u 2 32 living humans on Earth. Assuming that this number may increase as much as 32fold in the next 100 years, how many bits are necessary to represent any living human at any time in that period? Part D (5 points): Given the structure below, fill in the blanks as necessary to implement a flowchart that changes a lowercase ASCII letter to uppercase and ignores nonletters....
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This note was uploaded on 01/23/2012 for the course ECE 190 taught by Professor Hutchinson during the Spring '08 term at University of Illinois, Urbana Champaign.
 Spring '08
 Hutchinson

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