Chapter 2

Question 1

List 5 phases of developing a program

Answer 1

design the code, write the code, correct syntax errors, test program, correct logic error

Question 2

a logic error is…

Answer 2

A logic error is a mistake that does not prevent the program from running, but causes it to produce incorrect results.

Question 3

the person, group or organization that is asking you to write a program.

Answer 3

customer

Question 4

a single task that the program must perform in order to satisfy the customer.

Answer 4

software requirement

Question 5

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

Answer 5

algorithm

Question 6

fake code; informal language that has no syntax rules and is not meant to be complied or executed.

Answer 6

pseudocode

Question 7

any data the program receives while it is running.

Answer 7

input

Question 8

a piece of prewritten code that performs an operation.

Answer 8

function

Question 9

the data you want displayed on screen.

Answer 9

argument

Question 10

a sequence of characters that is used as data.

Answer 10

string

Question 11

a name that represents a value stored in the computer’s memory

Answer 11

variable

Question 12

data types

Answer 12

int (integer)

float(decimal)

Question 13

str:

Answer 13

string

Question 14

int:

Answer 14

integer

Question 15

number with decimal

Answer 15

float

Question 16

A(n) __________ makes a variable reference a value in the computer’s memory.

Answer 16

assignment statement

Question 17

comment in python

Answer 17

#

Question 18

integer division

Answer 18

//

Question 19

raises number to a power

Answer 19

**

Question 20

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

Answer 20

operands because the symbol is the operator

Question 21

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

Answer 21

%

Question 22

21. A magic number is ________________.

Answer 22

an unexplained value that appears in a program’s code

Question 23

A _ is a name that represents a value that does not change during the program’s execution.

Answer 23

variable signature

Question 24

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

Answer 24

false

Question 25

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

Answer 25

Order of operations tells you to perform multiplication and division first, working from left to right, before doing addition and subtraction.

Question 26

Variable names can have spaces in them.

Answer 26

false

Question 27

In Python, the first character of a variable name cannot be a number true/false

Answer 27

true

Question 28

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

Answer 28

false

Question 29

According to the behavior of integer division, when an integer is divided by an integer, the result will be a float.

Answer 29

false

Question 30

n Python, math expressions are always evaluated from left to right, no matter what the operators are. true/false

Answer 30

false

Question 31

Computer programs typically perform three steps: input is received, some process is performed on the input, and output is produced.

Answer 31

true

Question 32

In Python, print statements written on separate lines do not necessarily output on separate lines.

Answer 32

true

Question 33

All programs are normally stored in ROM and are loaded into RAM as needed for processing.

Answer 33

false

Question 34

The CPU understands instructions written in a binary machine language.

Answer 34

true

Question 35

The Python language uses a compiler which is a program that both translates and executes the instructions in a high-level language.

Answer 35

false

Question 36

IDLE is an alternative method to using a text editor to write, execute, and test a Python program.

Answer 36

true

Question 37

The __________ function reads a piece of data that has been entered at the keyboard and returns that piece of data, as a string, back to the program.

Answer 37

input()

Question 38

Which of the following will display 20%

a. print(format(20, ‘.0%’))
b. print(format(0.2, ‘.0%’))
c. print(format(0.2 * 100, ‘.0%’))
d. print(format(0.2, ‘%’))

Answer 38

print(format(0.2, ‘.0%’))

Question 39

Where does a computer store a program and the data that the program is working with while the program is running?

Answer 39

main memory

Question 40

When applying the .3f formatting specifier to the number 76.15854, what will be the result?

Answer 40

76.159

Question 41

Python uses __________ to categorize values in memory

Answer 41

data types

Question 42

num = 99

     num = 5

     print (‘num’)

Answer 42

5