Chapter 2 review

Question 1

A blank error does not prevent the program from running, but causes it to produce incorrect results.

Answer 1

logic

Question 2

Design is the most important part of the program development cycle.
How do you understand the task that the program is to perform?

Answer 2

-Work with customer to get a sense what the program is supposed to do
-Ask questions about program details
-Create one or more software requirements

Question 3

A(n) blank is a set of well-defined logical steps that must be taken to perform a task

Answer 3

Algorithm

Question 4

An informal language that has no syntax rules and is not meant to be compiled or executed is called

Answer 4

pseudocode

Question 5

A blank is a diagram that graphically depicts the steps that take place in a program

Answer 5

flowchart

Question 6

A blank is a sequence of characters

Answer 6

string

Question 7

A blank is a name that references a value in the computers memory

Answer 7

variable

Question 8

A blank is any hypothetical person using a program and providing input for it

Answer 8

user

Question 9

A string literal in Python must be enclosed in

Answer 9

either single-quotes or double-quotes

Question 10

Short notes placed in different parts of a program explaining how those parts of the program work are called

Answer 10

comments

Question 11

A(n) blank makes a variable reference a value in the computers memory

Answer 11

assignment statement

Question 12

This symbol marks the beginning of a comment in Python

Answer 12

pound symbol (#)

Question 13

Which of the following statements will cause an error?

a. x = 17
b. 17 = x
c. x = 99999
d. x = ‘17’

Answer 13

17 = x

Question 14

In the expression 12 + 7, the values on the right and left of the + symbol are called

Answer 14

operands

Question 15

This operator performs integer division

Answer 15

division operator (//)

-double forward slash is used to perform integer division

Question 16

This is an operator that raises a number to a power

Answer 16

exponent operator (**)

Question 17

This operator performs division, but instead of returning the quotient it returns the remainder

Answer 17

remainder operator (%)

Question 18

Suppose the following statement is in a program: price = 99.0. After this statement executes, the price variable will reference a value of which data type?

Answer 18

float

Question 19

Which built-in function can be used to read input that has been typed on the keyboard?

Answer 19

input ()

Question 20

Which built-in function can be used to convert an int value to a float?

Answer 20

float ()

Question 21

A magic number is

Answer 21

an unexplained value that appears in a programs code

Question 22

A blank is a name that represents a value that does not change during the programs execution

Answer 22

names constant

Question 23

True or False

Programmers must be careful not to make syntax errors when writing pseudocode programs

Answer 23

false

Question 24

True or False

In a math expression, multiplication and division take place before addition and subtraction

Answer 24

true

Question 25

True or False Variable names can have spaces in them

Answer 25

false

Question 26

True or False In Python, the first character of a variable name cannot be a number

Answer 26

true

Question 27

True or False If you print a variable that has not been assigned a value, the number 0 will be displayed

Answer 27

false