E- Written QuestionsExam 2

E- Written QuestionsExam 2 - 2^100 you instead must use a...

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14:440:127, Fall 2008 Exam 2 Version E The entire exam is closed book, and there is no collaboration permitted. All of your answers must be written in blue books; you will have separate bluebooks for the “No Computer” and “Computer” sections. Be sure to put your name and RUID on all bluebooks you use. Each “Computer” question is worth twice as much as each “No Computer” questions. All answers must relate to the Matlab programming language. For the first 20 minutes, you will not be permitted to use the computer. After 20 minutes, we will collect your bluebook for the first 4 (written) questions, and you will be permitted no further changes to those answers. For the final 4 questions, you will be permitted to use the computer by logging in to your special “Exam Accounts.” If you log in to your normal engineering account at any point during the exam, you will automatically fail. “No Computer” Question 1: Write a for loop that calculates 2 100 . You may not use the exponent operator (i.e. ,you can’t write
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Unformatted text preview: 2^100, you instead must use a bunch of multiplications). “No Computer” Question 2: What’s the largest integer that the int8 data type can store correctly? “No Computer” Question 3: Write a function called changedyourvectorHAHA that accepts as input a vector. As your output, you should return that same vector, but randomly change one of the elements of the vector to 1337. (Hint: generate a random integer between 1 and the length( ), and set that location in the vector equal to 1337). “No Computer” Question 4: a) Write Matlab code that generates a 100 x 100 vector of zeros, and sets just the element in Row 3, Column 4 to be 128. Save this matrix as M1. b) Now, write code to save M1 as a sparse matrix in the variable M2. c) In the preceding example, will the matrix M1 or the matrix M2 use less memory? d) Had the matrix M1 consisted entirely of unique, non-zero values, would M1 or M2 have used less memory?...
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