Chapter 5 and 6

Question 1

def main():
    x = 1
    y = 3.4
    print(x,y)
    change_us(x,y)
    print(x,y)
def change_us(a,b):
    a = 0
    b = 0
    print(a,b)
main()

Answer 1

1 3.4
0 0
1 3.4

Question 2

def class_function(a, b, c)

         d = (a+c) /b

         print(d)

Answer 2

def my_function(a, b, c):
d = (a + c) / b
print(d)
a. Write a statement that calls this function and uses keyword arguments to pass 2 into a, 4 into b, and 6 into c.
b. What value will be displayed when the function call executes?

Question 3

What will be the value displayed when this function call is executed?

Answer 3

2.0

Question 4

Look at the following function header:
def my_function(a, b, c):

Answer 4

my_function(3, 2, 1)

Question 5

When this call executes
def my_function(a, b, c):
Now look at the following call to my_function:
my_function(3, 2, 1)
What value will be assigned to a?
What value will be assigned to b?
What value will be assigned to c?

Answer 5

3 passed to a
2 passed to b
1 passed to c

Question 6

Write a statement that generates a random number in the range of 1 through 100 and assigns it to a
variable named rand.

Answer 6

rand = random.randint(1,100)

Question 7

The following statement calls a function named half,
which returns a value that is half that of the argument.
(Assume the number variable references a float value.)
Write code for the function: result = half (number)

Answer 7

def half (number):
return number/2

Question 8

A program contains the following function definition:
def cube (num) :
return num num num
Write a statement that passes the value 4 to this
function and assigns its return value to the variable result.

Answer 8

result=cube(4)

Question 9

Write a function named times_ ten that accepts

a number as an argument.

Answer 9

def times_ten(number):

Question 10

When the function is called, it should return the value of

its argument multiplied times 10.

Answer 10

return (number) *10

Question 11

get_first_name that asks the

user to enter his or her first name, and returns it.

Answer 11

def get_first_name():
first_name=input('Enter your first name: ')
return(first_name)

Question 12

def main():

print("The answer is", magic(5))

def magic(num):

answer = num + 2 * 10

return answer

main()

Answer 12

The function get_num() is expected to return a value for num1 and for num2.

Question 13

A function definition specifies what a function does and causes the function to execute.

Answer 13

false

Question 14

A local variable can be accessed from anywhere in the program.

Answer 14

false

Question 15

def main():
print("The answer is", magic(5))
def magic(num):
answer = num + 2 * 10
return answer
main()

Answer 15

25

Question 16

A function definition specifies what a function does and causes the function to execute.

Answer 16

false

Question 17

def main():

print("The answer is", magic(5))

def magic(num):

answer = num + 2 * 10

return answer

main()

Answer 17

25

Question 18

def pass_it(x, y):
z = x + ", " + y
return(z)
name2 = "Tony"
name1 = "Gaddis"
fullname = pass_it(name1, name2)
print(fullname)

Answer 18

Gaddis, Tony

Question 19

How many types of files are there to be used in a program?

Answer 19

two

text , binary

Question 20

Which method could be used to strip specific characters from the end of a string?

Answer 20

fstrip

Question 21

which method can be used to convert a tuple to a list?

Answer 21

list

Question 22

if the start index is _______ the end index, the slicing expression will return an empty sting

Answer 22

less than or equal

Question 23

2. Which method could be used to strip specific characters from the end of a string?

Answer 23

rstrip(), readline(), read()

Question 24

3. Which method will return an empty string when it has attempted to read beyond the end of a file?

Answer 24

ANS: readline()

Question 25

4. Which statement can be used to handle some of the runtime errors in a program?

Answer 25

ANS: try/except

Question 26

5. Given that the customer file references a file object, and the file was opened using the ‘w’ mode specifier, how would you write the string ‘Mary Smith’ to the file?

Answer 26

ANS: customer.write(‘Mary’ Smith’)

Question 27

The remove method removes all occurrences of an item from a list

Answer 27

False

Removes the first occurrence of item in the list.

Question 28

A list cannot be passed as an argument to a function.

Answer 28

FALSE

A list can be passed as an argument to a function

Question 29

Lists are dynamic data structures such that items may be added to them or removed from them.

Answer 29

True

Question 30

Which list will be referenced by the variable number after the following code is executed? Number = range(0,9,2)

Answer 30

ANS: [0, 2, 4, 6, 8]

Question 31

What will be the value of the variable list after the following code executes?

list = [1, 2]
list = list * 3

Answer 31

ANS: [1, 2, 1, 2 ,1, 2]

Question 32

What will be the value of the variable list2 after the following code executes?

list1 = [1, 2, 3]
list2 = []
for element in list1:
    list2.append(element)
list1 = [4, 5, 6]

Answer 32

ANS: [1, 2, 3]

Question 33

What is the first negative index in a list?

Answer 33

-1

Question 34

What list will be referenced by the variable list_stripafter the following code executes?
my_string = ‘03/07/2018’
list_strip = my_string.split(‘/’)

Answer 34

ANS: [‘03’, ‘07’, ‘2018’]

Question 35

What will be assigned to the variable s_stringafter the following code executes?
special = ‘1357 Country Ln.’
s_string = special[:4]

Answer 35

ANS: 1357

Question 36

Function names should be as short as possible.

Answer 36

False

Question 37

Calling a function and defining a function mean the same thing.

Answer 37

False

Question 38

A flowchart shows the hierarchical relationships between functions in a program.

Answer 38

False