Question 1

How do you retrieve a random data value in Python?

Accepted Answer

To implement this, we use the randint function from the random module. This random number generator will pick an integer in the range[a,b] including the endpoints. For example, randint(2,5) will return a random integer between 2 and 5 inclusive.

Question 2

What best describes the type of iteration that is shown in the code below?
For num in [1, 2, 3, 4, 5]:
Print("hello")

Accepted Answer

A)  Definite 
B)  Indefinite 
C)  Nested 
D)  Numeric 
A)  Definite 
B)  Indefinite 
C)  Nested 
D)  Numeric A

Question 3

In the K-means algorithm, the number of clusters is represented by:

Accepted Answer

A) c. B) k. C) the absolute value of X₂ - X₁. D) a star. A) c. B) k. C) the absolute value of X₂ - X₁. D) a star. B

Question 4

Case Study 3:
>>> aLine = next(csvReader)
>>> aLine
['3.7', '2006/10/18', '05:34:15', '62.326', '-151.224', '85.9', 'CENTRAL ALASKA']
>>> aLine[3]
>>> ???
>>> aLine[6:]
>>> ???
-Refer to the session in the accompanying Case Study 3. What is printed for aLine[6:]?

Accepted Answer

A)  '3.7' 
B)  '62.326' 
C)  '-151.224' 
D)  ['CENTRAL ALASKA'] 
A)  '3.7' 
B)  '62.326' 
C)  '-151.224' 
D)  ['CENTRAL ALASKA']

Question 5

Case Study 1:
1. def readFile(filename ):
2. with open(filename , "r") as dataFile
3. dataDict = {}
4.
5. key = 0
6. for aLine in dataFile:
7. key = key + 1
8. score = int(aLine)
9.
10. dataDict[key] = [score]
11.
12. return dataDict
-Refer to the session in the accompanying Case Study 1. What happens in Line 10?

Accepted Answer

A)  The score is entered in the dictionary associated with the key. 
B)  The line is read from the file. 
C)  The key is computed. 
D)  The file is opened. 
A)  The score is entered in the dictionary associated with the key. 
B)  The line is read from the file. 
C)  The key is computed. 
D)  The file is opened.

Question 6

Case Study 3:
>>> aLine = next(csvReader)
>>> aLine
['3.7', '2006/10/18', '05:34:15', '62.326', '-151.224', '85.9', 'CENTRAL ALASKA']
>>> aLine[3]
>>> ???
>>> aLine[6:]
>>> ???
-Refer to the session in the accompanying Case Study 3. What is printed for aLine[3]?

Accepted Answer

A)  '3.7' 
B)  '62.326' 
C)  '-151.224' 
D)  ['CENTRAL ALASKA'] 
A)  '3.7' 
B)  '62.326' 
C)  '-151.224' 
D)  ['CENTRAL ALASKA']

Question 7

Case Study 2:
1. total = 0
2. aNum = 1
3. while aNum <= 10:
4. total = total + aNum
5. aNum = aNum + 1
6. print(total)
-Refer to the session in the accompanying Case Study 2. Which line represents the initialization of the loop condition?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  5 
A)  1 
B)  2 
C)  3 
D)  5

Question 8

The process of "visualizing" data can be quite useful, especially if one is looking for hard-to-see relationships that may not be readily apparent from long lists of data.

Accepted Answer

A) True 
 B)False

Question 9

What is the problem with the loop shown below? 1. total = 0
2) aNum = 1
3) while aNum <= 10:
4) total = total + aNum
5) print(total)

Accepted Answer

A)  There is no initialization statement. 
B)  The condition is not checked. 
C)  It is a definite loop. 
D)  It is an infinite loop. 
A)  There is no initialization statement. 
B)  The condition is not checked. 
C)  It is a definite loop. 
D)  It is an infinite loop.

Question 10

One of the weaknesses of the K-means cluster analysis algorithm is that the clusters can become too large. Describe how this problem occurs and a possible solution.

Accepted Answer

Sometimes a cluster can get too large or

Question 11

Once the turtle has been directed to the proper location, what method will plot a point using the current tail color?

Accepted Answer

A)  point 
B)  draw 
C)  dot 
D)  color 
A)  point 
B)  draw 
C)  dot 
D)  color

Question 12

Match each definition with its phrase.
-A loop that never stops.

Accepted Answer

A)  while loop 
B)  for loop 
C)  infinite loop 
A)  while loop 
B)  for loop 
C)  infinite loop

Question 13

Longitude values run west-east, with the zero being the prime meridian, an imaginary line that runs north-south through Greenwich, England.

Accepted Answer

A) True 
 B)False

Question 14

Case Study 1:
1. def readFile(filename ):
2. with open(filename , "r") as dataFile
3. dataDict = {}
4.
5. key = 0
6. for aLine in dataFile:
7. key = key + 1
8. score = int(aLine)
9.
10. dataDict[key] = [score]
11.
12. return dataDict
-Refer to the session in the accompanying Case Study 1. What is the purpose of the program code [score]?

Accepted Answer

A)  It restricts the dictionary score to only hold a list. 
B)  It allows for multidimensional data points. 
C)  It uses the absolute value of score. 
D)  It places the variable score in a cluster. 
A)  It restricts the dictionary score to only hold a list. 
B)  It allows for multidimensional data points. 
C)  It uses the absolute value of score. 
D)  It places the variable score in a cluster.

Question 15

Match each definition with its phrase.
-Allows loop body statements to be executed until a condition becomes false.

Accepted Answer

A)  while loop 
B)  for loop 
C)  infinite loop 
A)  while loop 
B)  for loop 
C)  infinite loop

Question 16

What method is used to set a background image for a turtle screen?

Accepted Answer

A)  bgpic 
B)  Screen 
C)  bg 
D)  screensize 
A)  bgpic 
B)  Screen 
C)  bg 
D)  screensize

Question 17

One of the weaknesses of the K-means cluster analysis algorithm is that the clusters can become empty. Describe how this problem occurs and its effect.

Accepted Answer

Clusters may become empty as the iterati

Question 18

A(n) ____ is defined as the mean of a collection of data points.

Accepted Answer

A)  point collection 
B)  cluster 
C)  Euclid 
D)  centroid 
A)  point collection 
B)  cluster 
C)  Euclid 
D)  centroid

Question 19

What are the basic steps in the K-means algorithm?

Accepted Answer

1. Decide how many clusters you would li

Question 20

The equation d = X₂ - X₁ is used to find:

Accepted Answer

A)  Euclidean distance. 
B)  clustering. 
C)  a data mine. 
D)  the Pythagorean theorem. 
A)  Euclidean distance. 
B)  clustering. 
C)  a data mine. 
D)  the Pythagorean theorem.

How do you retrieve a random data value in Python?

What best describes the type of iteration that is shown in the code below? For num in [1, 2, 3, 4, 5]: Print("hello")

In the K-means algorithm, the number of clusters is represented by:

Case Study 3: >>> aLine = next(csvReader) >>> aLine ['3.7', '2006/10/18', '05:34:15', '62.326', '-151.224', '85.9', 'CENTRAL ALASKA'] >>> aLine[3] >>> ??? >>> aLine[6:] >>> ??? -Refer to the session in the accompanying Case Study 3. What is printed for aLine[6:]?

Case Study 3: >>> aLine = next(csvReader) >>> aLine ['3.7', '2006/10/18', '05:34:15', '62.326', '-151.224', '85.9', 'CENTRAL ALASKA'] >>> aLine[3] >>> ??? >>> aLine[6:] >>> ??? -Refer to the session in the accompanying Case Study 3. What is printed for aLine[3]?

Case Study 2: 1. total = 0 2. aNum = 1 3. while aNum <= 10: 4. total = total + aNum 5. aNum = aNum + 1 6. print(total) -Refer to the session in the accompanying Case Study 2. Which line represents the initialization of the loop condition?

The process of "visualizing" data can be quite useful, especially if one is looking for hard-to-see relationships that may not be readily apparent from long lists of data.

What is the problem with the loop shown below? 1. total = 0 2) aNum = 1 3) while aNum <= 10: 4) total = total + aNum 5) print(total)

One of the weaknesses of the K-means cluster analysis algorithm is that the clusters can become too large. Describe how this problem occurs and a possible solution.

Once the turtle has been directed to the proper location, what method will plot a point using the current tail color?

Match each definition with its phrase. -A loop that never stops.

Longitude values run west-east, with the zero being the prime meridian, an imaginary line that runs north-south through Greenwich, England.

Match each definition with its phrase. -Allows loop body statements to be executed until a condition becomes false.

What method is used to set a background image for a turtle screen?

One of the weaknesses of the K-means cluster analysis algorithm is that the clusters can become empty. Describe how this problem occurs and its effect.

A(n) ____ is defined as the mean of a collection of data points.

What are the basic steps in the K-means algorithm?

The equation d = X<sub>2</sub> - X<sub>1</sub> is used to find:

Introduction to Python: Introduction to Numeric Types, Turtle Graphics, Simple for Loops and Functions

Pthon: Estimating PI: Math and Random Methods, Selection and Boolean Expressions, the Print Function

Codes and Other Secrets: String Operators and Methods, the Len Built-In Function, Keyword Parameters, User Input

Introducing the Python Collections: Lists, Dictionaries, Tuples, and Statistics

Bigger Data: File Io: the While Loop, String Formatting, Reading Online Data in CSV and Json Formats

Image Processing: Nested for Loops, Functions As Parameters, Namespaces, Lists of Lists

Cryptanalysis: Advanced Dictionaries and Lists, Regular Expressions

Fractals: the Geometry of Nature: Recursion, Grammars and Production Rules

Astronomy: Creating Classes, Writing Constructors, Accessors, Mutators and Special Methods

Simulation:computer Simulation Using Objects

Father Was a Rectangle: Inheritance and Object-Oriented Design

Video Games: Multithreading, Event Handlers, Static Variables

Filters

Exam 7: Data Mining: Cluster Analysis: More on the While Loop; Parrallel Lists

How do you retrieve a random data value in Python?

What best describes the type of iteration that is shown in the code below? For num in [1, 2, 3, 4, 5]: Print("hello")

In the K-means algorithm, the number of clusters is represented by:

Case Study 3: >>> aLine = next(csvReader) >>> aLine ['3.7', '2006/10/18', '05:34:15', '62.326', '-151.224', '85.9', 'CENTRAL ALASKA'] >>> aLine[3] >>> ??? >>> aLine[6:] >>> ??? -Refer to the session in the accompanying Case Study 3. What is printed for aLine[6:]?

Case Study 3: >>> aLine = next(csvReader) >>> aLine ['3.7', '2006/10/18', '05:34:15', '62.326', '-151.224', '85.9', 'CENTRAL ALASKA'] >>> aLine[3] >>> ??? >>> aLine[6:] >>> ??? -Refer to the session in the accompanying Case Study 3. What is printed for aLine[3]?

Case Study 2: 1. total = 0 2. aNum = 1 3. while aNum <= 10: 4. total = total + aNum 5. aNum = aNum + 1 6. print(total) -Refer to the session in the accompanying Case Study 2. Which line represents the initialization of the loop condition?

The process of "visualizing" data can be quite useful, especially if one is looking for hard-to-see relationships that may not be readily apparent from long lists of data.

What is the problem with the loop shown below? 1. total = 0 2) aNum = 1 3) while aNum <= 10: 4) total = total + aNum 5) print(total)

One of the weaknesses of the K-means cluster analysis algorithm is that the clusters can become too large. Describe how this problem occurs and a possible solution.

Once the turtle has been directed to the proper location, what method will plot a point using the current tail color?

Match each definition with its phrase. -A loop that never stops.

Longitude values run west-east, with the zero being the prime meridian, an imaginary line that runs north-south through Greenwich, England.

Match each definition with its phrase. -Allows loop body statements to be executed until a condition becomes false.

What method is used to set a background image for a turtle screen?

One of the weaknesses of the K-means cluster analysis algorithm is that the clusters can become empty. Describe how this problem occurs and its effect.

A(n) ____ is defined as the mean of a collection of data points.

What are the basic steps in the K-means algorithm?

The equation d = X<sub>2</sub> - X<sub>1</sub> is used to find:

Introduction to Python: Introduction to Numeric Types, Turtle Graphics, Simple for Loops and Functions

Pthon: Estimating PI: Math and Random Methods, Selection and Boolean Expressions, the Print Function

Codes and Other Secrets: String Operators and Methods, the Len Built-In Function, Keyword Parameters, User Input

Introducing the Python Collections: Lists, Dictionaries, Tuples, and Statistics

Bigger Data: File Io: the While Loop, String Formatting, Reading Online Data in CSV and Json Formats

Image Processing: Nested for Loops, Functions As Parameters, Namespaces, Lists of Lists

Cryptanalysis: Advanced Dictionaries and Lists, Regular Expressions

Fractals: the Geometry of Nature: Recursion, Grammars and Production Rules

Astronomy: Creating Classes, Writing Constructors, Accessors, Mutators and Special Methods

Simulation:computer Simulation Using Objects

Father Was a Rectangle: Inheritance and Object-Oriented Design

Video Games: Multithreading, Event Handlers, Static Variables

Filters