Python for Data Science, AI & Development Final Exam Quiz Answers

Python for Data Science, AI & Development

Final Exam Quiz Answers

Final Exam

Question 1)

When slicing in Python what does the “0” in this statement [0:2] specify ?

It specifies the position to start the slice

Question 2)

If var = “01234567” what Python statement would print out only the odd elements ?

print(var[1::2])

Question 3)

Consider the string Name=”EMILY”, what statement would return the index of 0 ?

Name.find("E")

Question 4)

What is the type of the following: 1.0

float

Question 5)

What is the result of the following code segment: int(3.99)

Question 6)

What is the result of the following code segment:1/2 ?

Question 7)

In Python 3, what is the type of the variable x after the following: x=2/2 ?

float

Question 8)

Dictionary items can be:

Numerous data types

Question 9)

What is a tuple ?

A collection that is ordered and unchangeable

Question 10)

What is the result of the following operation: '1:2,3:4'.split(':') ?

['1', '2,3', '4']

Question 11)

What is an important difference between lists and tuples ?

Lists are mutable tuples are not

Question 12)

How do you cast the list A to the set a ?

a=set(A)

Question 13)

If x=1 what will produce the below output ?

Mike

if(x!=1):
print('Hello')
else:
print('Hi')
print('Mike')

Question 14)

What statement will execute the remaining code no matter the end result ?

Finally

Question 15)

What add function would return ‘4’ ?

def add(x): return(x+x) add(2)

Question 16)

What method organizes the elements in a given list in a specific descending or ascending order ?

sort()

Question 17)

What is the output for the below line of code ?

A=[8,5,2] for a in A: print(12-a)

Question 18)

What is the output of the following ?

for i in range(1,5): if (i!=2): print(i)

Question 19)

What is the height of the rectangle in the class Rectangle ?

class Rectangle(object): def __init__(self,width=2,height =3,color='r'): self.height=height self.width=width self.color=color def drawRectangle(self): import matplotlib.pyplot as plt plt.gca().add_patch(plt.Rectangle((0, 0),self.width, self.height ,fc=self.color)) plt.axis('scaled') plt.show()

Question 20)

What is the result of the following lines of code ?

a=np.array([0,1,0,1,0]) b=np.array([1,0,1,0,1]) a/b

Division by zero error

Question 21)

What is the result of the following lines of code ?

a=np.array([1,1,1,1,1]) a+10

array([11, 11, 11, 11, 11])

Question 22)

The following line of code selects the columns along with what headers from the dataframe df ?

y=df[['Artist','Length','Genre']]

‘Artist’, ‘Length’ and ‘Genre’

Question 23)

What is the method readline() used for?

It helps to read one complete line from a given text file

Question 24)

Consider the following line of code:

with open("Example.txt","a") as file1:

What mode is the file object in?

append

Question 25)

What does URL stand for ?

Uniform Resource Locator

Question 26)

When slicing in Python what does the “2” in this statement [0:2] specify ?

It specifies the position to end the slice

Question 27)

Consider the string Name="ABCDE", what is the result of the following operation Name.find("B") ?

Question 28)

What is the type of the following: 1.0

float

Question 29)

What following code segment would return a 3 ?

int(3.99)

Question 30)

When using the double slash “//” for integer division the result will be ?

Rounded

Question 31)

In Python 3 what does regular division always result in ?

Float

Question 32)

Whatdata type must have unique keys ?

Dictionary

Question 33)

What is the syntax to obtain the first element of the tuple ?

A=('a','b','c')

A[0]

Question 34)

What does the split() method return from a list of words ?

The list of words in a string separated by a delimiter

Question 35)

What is an important difference between lists and tuples ?

Lists are mutable tuples are not

Question 36)

What code segment is used to cast list “B” to the set “b” ?

b=set(B)

Question 37)

What code segment would output the following ?

for i in range(1,5): if (i!=1): print(i)

Question 38)

What is the result of the following lines of code ?

a=np.array([0,1,0,1,0]) b=np.array([1,0,1,0,1]) a*b

array([0, 0, 0, 0, 0])

Question 39)

What is the result of the following lines of code ?

a=np.array([10,9,8,7,6]) a+1

array([11,10,9,8,7])

Question 40)

How would you select the columns with the headers: Artist, Length and Genre from the dataframe df and assign them to the variable y ?

y=df[['Artist','Length','Genre']]

Question 41)

Consider the file object: File1.What would the following line of code output?

file1.readline(4)

It would output the first 4 characters from the text file

Question 42)

Which line of code is in the mode of append ?

with open("Example.txt","a") as file1:

Question 43)

In Python what statement would print out the first two elements “Li” of “Lizz” ?

print(name[0:2])

Question 44)

In Python, if you executed var = '01234567', what would be the result of print(var[::2]) ?

0246

Question 45)

Consider the string Name=”EMILY”, what statement would return the index of 0 ?

Name.find("E")

Question 46)

In Python what can be either a positive or negative number but does not contain a decimal point ?

Question 47)

What following code segment would produce an output of “0.5” ?

Question 48)

In Python 3 what does regular division always result in ?

Float

Question 49)

What does the index of “1” correspond to in a list or tuple ?

The second element

Question 50)

Given the function add shown below, what does the following return ?

def add(x): return(x+x) add('1')

'11'

Question 51)

What function returns a sorted list ?

sorted()

Question 52)

What segment of code would output the following ?

A=['1','2','3'] for a in A: print(2*a)

Question 53)

What line of code would produce the following: array([11, 11, 11, 11, 11]) ?

a=np.array([1,1,1,1,1]) a+10

Question 54)

In Python what data type is used to represent text and not numbers ?

Question 55)

Whatdata type must have unique keys ?

Dictionary

Question 56)

Lists are:

Mutable

Question 57)

What is the process of forcing your program to output an error message when it encounters an issue ?

Exception handling

Question 58)

A list cannot be sorted if it contains:

strings and numeric values

Question 59)

What is the method defined in the class Rectangle used to draw the rectangle?

drawRectangle

Question 60)

What is the result of the following lines of code ?

a=np.array([0,1,0,1,0]) b=np.array([1,0,1,0,1]) a+b

array([1, 1, 1, 1, 1])

Question 61)

What mode over writes existing text in a file ?

Write “w”

Question 62)

If var = “01234567” what Python statement would print out only the even elements?

print(var[::2])

Question 63)

In Python 3 what following code segment will produce a float ?

Question 64)

What will this code segment “A[0]” obtain from a list or tuple ?

The first element of a list or tuple

Question 65)

What line of code would produce this output: ['1','2','3','4'] ?

'1,2,3,4'.split(',')

Question 66)

What is an error that occurs during the execution of code ?

Exception

Question 67)

What add function would return ‘2’ ?

def add(x): return(x+x) add(1)

Question 68)

What is the output of the following few lines of code ?

A=['1','2','3'] for a in A: print(2*a)

Question 69)

What code segment would output the following ?

for i in range(1,5): if (i==2): print(i)

Question 70)

What is the width of the rectangle in the class Rectangle?

Question 71)

What is the result of the following lines of code ?

a=np.array([0,1,0,1,0]) b=np.array([1,0,1,0,1]) a+b

array([1, 1, 1, 1, 1])

Python for Data Science, AI & Development Final Exam Quiz Answers