Exam 11: Simulation:computer Simulation Using Objects

Suppose you are working with the bear and fish simulation presented in your text, which uses a two-dimensional grid. Describe the process by which the tryToBreed method chooses a random location next to the fish.

Free

(Essay)

4.7/5

(44)

Question 1

Correct Answer:

Verified

According to the rules, this method must first pick a random adjacent location. To do this, we can use an offset list technique. In this case, instead of iterating through all of the offsets, we will simply pick one. In order to choose a random element of the list, we will first choose a random integer in the range of index values using the length of the offsetList as the upper bound. Once we compute this new (x, y) position, we must be sure that it is in the actual range of legal coordinates. If it is not, we must try again.

Case Study 2: 1. def liveALittle(self): 2. self.breedTick = self.breedTick + 1 3. ?????? 4. self.tryToBreed() 5. 6. self.tryToEat() 7. 8. if self.starveTick == 10: 9. self.world.delThing(self) 10. else: 11. ?????? -Refer to the session in the accompanying Case Study 2, which shows the liveALittle method for the Bear class. What belongs on line 3?

Free

(Multiple Choice)

4.9/5

(33)

Question 2

Correct Answer:

Verified

Provide a high-level overview of the bears and fish simulation by outlining the algorithm of the main function.

Free

(Essay)

4.9/5

(35)

Question 3

Correct Answer:

Verified

1. Set initial constants pertaining to the number of bears and fish, the size of the world, and the length of the simulation.
2. Create an instance of the World.
3. Create the specified number of bears and fish and place them at random locations in the world.
4. Let the world live for the specified number of time units.

Suppose you are working with the bear and fish simulation presented in your text, which uses a two-dimensional grid. Explain how to determine the number of fish that are next to a certain fish.

(Essay)

4.8/5

(40)

Question 4

Match each definition with its term. -The list of things that an object should know.

(Multiple Choice)

4.9/5

(32)

Question 5

Case Study 2: 1. def liveALittle(self): 2. self.breedTick = self.breedTick + 1 3. ?????? 4. self.tryToBreed() 5. 6. self.tryToEat() 7. 8. if self.starveTick == 10: 9. self.world.delThing(self) 10. else: 11. ?????? -Refer to the session in the accompanying Case Study 2, which shows the liveALittle method for the Bear class. What belongs on line 11?

(Multiple Choice)

4.9/5

(42)

Question 6

Case Study 1: 1. class Fish: 2. def init(self): 3. self.turtle = turtle.Turtle () 4. self.turtle.up() 5. ?????? 6. self.turtle.shape(""Fish. g i f"") 7. 8. self.xPos = 0 9. self.yPos = 0 10. self.world = None 11. 12. self.__breedTick = 0 -Refer to the session in the accompanying Case Study 1. What belongs on line 5?

(Multiple Choice)

4.8/5

(41)

Question 7

What built-in function asks if an object is an instance of a particular class?

(Multiple Choice)

4.8/5

(33)

Question 8

Case Study 3: 1. def mainSimulation(): 2. numberOfBears = 10 3. numberOfFish = 10 4. worldLifeTime = 2500 5. worldWidth = 50 6. worldHeight = 25 7. 8. myWorld = World(worldWidth, worldHeight) 9. myWorld.draw() 10. 11. for i in range(numberOfFish): 12. newFish = Fish() 13. x = random.randrange(myWorld.getMaxX()) 14. y = random.randrange(myWorld.getMaxY()) 15. while not myworld.emptyLocation(x, y): 16. x = random.randrange(myWorld.getMaxX()) 17. y = random.randrange(myWorld.getMaxY()) 18. myWorld.addThing(newFish, x, y) 19. 20. for i in range(numberOfBears): 21. newBear = Bear() 22. x = random.randrange(myWorld.getMaxX()) 23. y = random.randrange(myWorld.getMaxY()) 24. while not myWorld.emptyLocation(x, y): 25. x = random.randrange(myWorld.getMaxX()) 26. y = random.randrange(myWorld.getMaxY()) 27. myWorld.addThing(newBear, x, y) 28. 29. for i in range(worldLifeTime): 30. myWorld.liveALittle() 31. 32. myWorld.freezeWorld() -Refer to the session in the accompanying Case Study 3. On what lines does most of the simulation work take place?

(Multiple Choice)

4.8/5

(45)

Question 9

When transforming a problem into program code, ____ become objects.

(Multiple Choice)

4.8/5

(48)

Question 10

Consider the bears and fish simulation presented in your text. Explain how the Bear class is similar to and different from the Fish class.

(Essay)

4.9/5

(36)

Question 11

When transforming a problem into program code, what should you use to define the instance variables of an object?

(Multiple Choice)

4.7/5

(37)

Question 12

In the bears and fish simulation presented in your text, if a fish has two or more adjacent fish, it will:

(Multiple Choice)

4.7/5

(46)

Question 13

Removing a life-form from a simulation world requires only that it be taken off the grid.

(True/False)

4.9/5

(30)

Question 14

Explain how to design the Python classes that will be used in a program.

(Essay)

4.9/5

(33)

Question 15

Match each definition with its term. -The list of things than an object should be able to do.

(Multiple Choice)

4.8/5

(29)

Question 16

Case Study 1: 1. class Fish: 2. def init(self): 3. self.turtle = turtle.Turtle () 4. self.turtle.up() 5. ?????? 6. self.turtle.shape(""Fish. g i f"") 7. 8. self.xPos = 0 9. self.yPos = 0 10. self.world = None 11. 12. self.__breedTick = 0 -Refer to the session in the accompanying Case Study 1. What does this code represent?

(Multiple Choice)

4.9/5

(36)

Question 17

The mainSimulation function creates all the life-forms that will exist during the simulation.

(True/False)

4.8/5

(33)

Question 18

In the simulation of bears and fish presented in your text, all life-forms are "alive" at the same time.

(True/False)

4.8/5

(28)

Question 19

Describe the move method for fish for the simulation presented in your text.

(Essay)

4.8/5

(43)

Question 20

Showing 1 - 20 of 34

Suppose you are working with the bear and fish simulation presented in your text, which uses a two-dimensional grid. Describe the process by which the tryToBreed method chooses a random location next to the fish.

Provide a high-level overview of the bears and fish simulation by outlining the algorithm of the main function.

Suppose you are working with the bear and fish simulation presented in your text, which uses a two-dimensional grid. Explain how to determine the number of fish that are next to a certain fish.

Match each definition with its term. -The list of things that an object should know.

What built-in function asks if an object is an instance of a particular class?

When transforming a problem into program code, ____ become objects.

Consider the bears and fish simulation presented in your text. Explain how the Bear class is similar to and different from the Fish class.

When transforming a problem into program code, what should you use to define the instance variables of an object?

In the bears and fish simulation presented in your text, if a fish has two or more adjacent fish, it will:

Removing a life-form from a simulation world requires only that it be taken off the grid.

Explain how to design the Python classes that will be used in a program.

Match each definition with its term. -The list of things than an object should be able to do.

The mainSimulation function creates all the life-forms that will exist during the simulation.

In the simulation of bears and fish presented in your text, all life-forms are "alive" at the same time.

Describe the move method for fish for the simulation presented in your text.

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

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

Father Was a Rectangle: Inheritance and Object-Oriented Design

Video Games: Multithreading, Event Handlers, Static Variables

Filters