rec7 - CS 177 Week 7 Recitation Slides Modifying Sounds...

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1 CS 177 Week 7 Recitation Slides Modifying Sounds using Loops + Discussion of some Exam Questions

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2 ANY QUESTIONS?
3 Q3. Consider the following function definition: def sum(a, b): c = a + b return c print “Hello World” What is the output when you execute sum(4,5) from the command window in JES? A) 9 B) Hello World C) 9 Hello World D) There is no output A)

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4 Q5. How many times does the following code print “CS177” ? for i in range(0,5): for j in range(4): print “CS177” print “CS177” A) 20 times B) 21 times C) 30 times D) 31 times B)
5 Q9. Consider that the numbers from 1 to 20 are arranged in a two dimensional matrix with 4 rows and 5 columns, filling one row after the other. What are the co-ordinates for the number 14 within the matrix? A) (3, 2) B) (3, 4) C) (2, 3) D) (4, 3) C)

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6 Q11. Assume that we have a picture with width of 300 and height of 50. We want to write a program that scales the picture up by a factor of 4 and then rotates the picture to the left by 90 degrees. Which of the following statements should we use to make the empty picture that will be used by our program? A) newPicture = makeEmptyPicture(200, 1200) B) newPicture = makeEmptyPicture(1200, 200) C) newPicture = makeEmptyPicture(300, 200) D) newPicture = makeEmptyPicture(300, 50) B)
7 Q13. Assume that we have a function max(a, b, c, d) that returns the maximum of the given parameters. Which of the following is NOT a legal statement? A) value = max(7, 5, 11, 9) + 10 B) print max(1, 3, 2, 4) C) max(11, 17, 13, 15) D) result = max(4, 2, 3) D)

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8 Q25. Consider the following function: def myFunc(pict): allPixels = getPixels(pict) for p in allPixels: value = getRed(p) setRed(p, value*0.5) What does myFunc function do? A)
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This note was uploaded on 02/22/2012 for the course CS 177 taught by Professor Staff during the Fall '08 term at Purdue University-West Lafayette.

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rec7 - CS 177 Week 7 Recitation Slides Modifying Sounds...

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