Chapters 1-3 "Python Programming: An Introduction to Computer Science, 3rd Ed." by John Zelle Questions and Answers

Chapters 1-3 "Python Programming: An Introduction to Computer Science, 3rd Ed." by John Zelle Questions and Answers T/F Computer science is the study of computers. FALSE the fundamental question is "what can be computed?" T/F The CPU is the "brain" of the computer. TRUE T/F Secondary memory is also called RAM. FALSE main memory is called RAM. secondary memory is hard disks, solid-state disks, flash drives, CDs, and DVDs T/F All information that a computer is currently working on is stored in main memory. TRUE T/F The syntax of a language is its meaning, and semantics is its form. FALSE syntax is form and semantics is meaning T/F A function definition is a sequence of statements that defines a new command. TRUE T/F A programming environment refers to a place where programmers work. FALSE a programming environment is a program designed to help programmers write programs T/F A variable is used to give a name to a value to it can be referred to in other places. TRUE T/F A loop is used to skip over a section of a program. FALSE a loop is used to repeat a section of code T/F A chaotic function can't be computed by a computer. FALSE we literally wrote the program that computes a chaotic function What is the fundamental question of computer science? What can be computed? An algorithm is like a _____ recipe A problem is intractable when ___________ it is not practical to solve Which of the following is /not/ an example of secondary memory? RAM Computer languages designed to be used and understood by humans are _______ high-level languages A statement is ____________ a complete computer command One difference between a compiler and an interpreter is ____ a compiler is no longer needed after a program is translated By convention, the statements of a program are often placed in a function called ______ main Which of the following is /not/ true of comments? They make a program more efficient The items listed in the parentheses of a function definition are called _____ parameters (not arguments; arguments are the data stored in parameters) T/F The best way to write a program is to immediately type in some code and then debug it until it works. FALSE there are many steps T/F An algorithm can be written without using a programming language. TRUE T/F Programs no longer require modification after they are written and debugged. FALSE they need to be maintained T/F Python identifiers must start with a letter or underscore. TRUE T/F Keywords make good variable names. FALSE keywords/reserved words are literally the worst idea ever to use T/F Expressions are built from literals, variables, and operators. TRUE (L.O.V.) T/F In Python, x = x + 1 is a legal statement. TRUE T/F Python does not allow the input of multiple variable with a single statement. FALSE simultaneous assignment is a thing T/F A counted loop is designed to iterate a specific number of times. TRUE T/F In a flowchart, diamonds are used to show statements, and rectangles are used for decision points. FALSE Diamonds are used for decisions, and rectangles for statements. What of the following is not a step in the software development process? fee setting What is the correct formula for converting Celsius to Fahrenheit? F = 9/5(C) + 32 The process of describing exactly what a computer program will do to solve a problem is called _____ specification Which of the following is not a legal identifier? 2spam Which of the following are not used in expressions? (L.O.V.) statements Fragments of code that produce or calculate new data values are called ______ expressions (NOT assignment statements) Which of the following is not part of the IPO pattern? program (input, process, output is the correct pattern) The template for <variable> in range(<expr>) describes _____ a COUNTED loop Which of the following is the most accurate model of assignment in Python? sticky note In Python getting user input is done with a special expression called ____ input T/F Information that is stored and manipulated by computers is called data. TRUE T/F Since floating point numbers are extremely accurate, they should generally be used instead of ints. FALSE slower & unnecessary for some calculations T/F Operations like addition and subtraction are defined in the math library. FALSE they a part of basic python T/F The number of possible rearrangements of n items is equal to n!. TRUE T/F The sqrt function computes the squirt of a number. FALSE T/F The int data type is identical to the mathematical concept of integer. TRUE T/F Computers represent numbers using base 2 representations. TRUE T/F A hardware float can represent a larger range of values than a hardware int. TRUE T/F A Python int can represent indefinitely large numbers. FALSE Python is limited by the amount of computer memory available. T/F In Python, 4+5 produces the same result type as 4.0+5.0. FALSE 9 ≠ 9.0 What of the following is not a Python data type? rational