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Solution Manual for Fundamentals of Python First Programs, 3rd Edition Kenneth A. Lambert

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Solution Manual for Fundamentals of Python First Programs, 3rd Edition Kenneth A. Lambert-1. List three common types of computing agents. Solution: Human beings, desktop computers, cell phones 2. W... rite an algorithm that describes the second part of the process of making change (counting out the coins and bills). Solution: There are various ways to do this, but here is one: Repeat Select the largest unit of money that is less than or equal to the remaining change Subtract this unit from the remaining change Until the remaining change is 0 The collection of units selected represent the change 3. Write an algorithm that describes a common task, such as baking a cake. Solution and Answer Guide For All Chapters: Lambert, Fundamentals of Python: First Programs, 3e, CY24, 9780357881019; Chapter 1, Introduction 2 Solution: There are various ways to do this, but here is one: Preheat an oven to 375 degrees Add 1 cup of water and 1 egg to a mixing bowl Beat the liquid mixture in the bowl until the ingredients are blended Add the contents of a boxed cake mix to the mixing bowl Beat the mixture in the bowl until the ingredients are blended Pour the contents of the mixing bowl into a lightly greased cake pan Bake the cake in the oven for 45 minutes 4. Describe an instruction that is not well defined and thus could not be included as a step in an algorithm. Give an example of such an instruction. Solution: Attempting to divide a number by 0 5. In what sense is a laptop computer a general-purpose problem-solving machine? Solution: A laptop computer is a general-purpose problem-solving machine because it is programmable and can solve any problem for which there is an algorithm. 6. List four devices that use computers and describe the information that they process. (Hint: Think of the inputs and outputs of the devices.) Solution: Digital camera—images, music player—sound, cell phone—text, ATM—numbers EXERCISE 1.2 1. List two examples of input devices and two examples of output devices. Solution: Input devices—keyboard and mouse, output devices—monitor and speakers 2. What does the central processing unit (CPU) do? Solution: The CPU fetches, decodes, and executes instructions. 3. How is information represented in hardware memory? Solution: Information is represented using binary notation, which in hardware is a pattern of voltage levels. Solution and Answer Guide For All Chapters: Lambert, Fundamentals of Python: First Programs, 3e, CY24, 9780357881019; Chapter 1, Introduction 3 4. What is the difference between a terminal-based interface and a graphical user interface? Solution: A terminal-based interface supports only the input and output of text with a keyboard and monitor. A graphical user interface supports the output of images and the manipulation of them with a pointing device, the mouse. 5. What role do translators play in the programming process? Solution: A translator converts a program written in a high-level language (human readable and writable) to an equivalent program in a low-level language (machine readable and executable). EXERCISE 1.3 1. Describe what happens when the programmer enters the string "Greetings!" in the Python shell. Solution: Python reads the string "Greetings!", evaluates it, and displays this string (including single quotes) in the shell. 2. Write a line of code that prompts the user for their name and saves the user’s input in a variable called name. Solution: name = input("Enter your name: ") 3. What is a Python script? Solution: A Python script is a complete Python program that can be run from a computer’s operating system. 4. Explain what goes on behind the scenes when your computer runs a Python program. Solution: If the program has not already been translated, Python’s compiler translates it to byte code. The Python virtual machine then executes this code. [Show More]

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