Chapter 2

Question 1

Program development cycle:

Answer 1

-design the program
-write the code
-correct syntax errors
-test the program
-correct logic errors

Question 2

Most important part of the program development cycle

Answer 2

design

Question 3

What is algorithm?

Answer 3

Set of well-defined logical steps that must be taken to perform a task

Question 4

What is pseudocode?

Answer 4

Fake code

Question 5

What is Flowchart?

Answer 5

A diagram that graphically depicts the steps in a program

-Ovals are terminal symbols
-Parallelograms are input and output symbols
-Rectangles are processing symbols
-Symbols are connected by arrows that represent the flow of the program

Question 6

What three-step process do computers typically perform?

Answer 6

-Receive input
Input: any data that the program receives while it is running
-Perform some process on the input
Ex: mathematical calculation
-Produce output

Question 7

A piece of prewritten code that performs an operation

Answer 7

Function

Question 8

What displays output on the screen?

Answer 8

The print function

Question 9

Data given to the function

Answer 9

Argument

Ex. data that is printed to screen

Question 10

A sequence of characters that is used as data

Answer 10

String

Question 11

String that appears in actual code of a program

Answer 11

String literal

-Must be enclosed in a single (‘) or double (“) quote marks

Question 12

Notes of explanation within a program

Answer 12

Comments

-Intended for a person reading the programs code
-Being with #

Question 13

What appears at the end of a line code?

Answer 13

End-line comment

-typically explains the purpose of that line

Question 14

Name that represents a value stored in the computer memory

-Used to access and manipulate data stored in memory
-References the value it represents

Answer 14

Variable

Question 15

Used to create a variable and make it reference data

-General format is variable = expression
Ex: age = 29
Assignment operator: the equal sign (=)

Answer 15

Assignment statement

Question 16

Removal of values that are no longer referenced by variables. Carried out by Python interpreter.

Answer 16

Garbage collection

Question 17

Data Types

Answer 17

Categorize value in memory

e.g. int for integer, float for real number, str used for storing strings in memory

Question 18

Number written in program

-no decimal point considered int, otherwise, considered float

Answer 18

Numeric literal

Question 19

Raises a number to a power
Ex: x ** y = x^y

Answer 19

Exponent operator (**)

Question 20

Performs division and returns the remainder
aka modulus operator
Ex: 4%2=0, 5%2=1

Answer 20

Remainder operator (%)

Question 21

Allows to break a statement into multiple lines

result = var1 * 2 + var2 * 3 + \
var3 * 4 + var4 * 5

Answer 21

Multiline continuation character ()

Question 22

An unexplained numeric value that appears in a programs code

Ex: amount = balance * 0.069

Answer 22

Magic number