# e1.s04 - ECE 199 Exam I Spring 2004 Wednesday, February 25...

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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 8-bit 2¡s complement) 11011001 (from 8-bit 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 32-fold 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 non-letters....
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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.

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e1.s04 - ECE 199 Exam I Spring 2004 Wednesday, February 25...

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