Are you looking for Python for Data Science Exam Answers by Cognitive Class? If yes, this article will help you find all the questions and answers asked in the cognitive Class Python for Data Science quiz. I have followed this article to solve all the questions for this exam.
This introduction to Python will kickstart your learning of Python for data science, as well as programming in general. This beginner-friendly Python course will take you from zero to programming in Python in a matter of hours. Upon its completion, you’ll be able to write your own Python scripts and perform basic hands-on data analysis using our Jupyter-based lab environment. If you want to learn Python from scratch, this free course is for you.
Organization | Cognitive Class |
Trainer | Joseph Santarcangelo |
Eligibility | Anyone interested in learning to program with Python for Data Science |
Level | Beginner |
Duration | 20hr |
Language | English |
Price | Free |
Certificate | Yes |
Python for Data Science | Click Here |
Cognitive Class – Python for Data Science Answers

Module 1: Python Basics
1. What is the result of the following operation in Python:
2. In Python, if you executed name = ‘Lizz’, what would be the output of print(name[0:2])?
3. In Python, if you executed var = ‘01234567’, what would be the result of print(var[::2])?
4. In Python, what is the result of the following operation ‘1’+’2′
5. Given myvar = ‘hello’, how would you convert myvar into uppercase?
Module 2: Python Data Structures
1. What is the syntax to obtain the first element of the tuple:
2. After applying the following method,L.append([‘a’,’b’]), the following list will only be one element longer.
3. How many duplicate elements can you have in a set?
4. >>>>Consider the following Python Dictionary: Dict={“A”:1,”B”:”2″,”C”:[3,3,3],”D”:(4,4,4),’E’:5,’F’:6}, what is the result of the following operation: Dict[“D”]
5. What is an important difference between lists and tuples?
Module 3: Python Programming Fundamentals
1. What is the output of the following lines of code:
x=1
if(x!=1):
print(‘Hello’)
else:
print(‘Hi’)
print(‘Mike’)
2. What is the output of the following few lines of code ?
A=[‘1′,’2′,’3’]
for a in A:
print(2*a)
3. Consider the function Delta, when will the function return a value of 1
def Delta(x):
if x==0:
y=1;
else:
y=0;
return(y)
4. What is the correct way to sort the list ‘B’ using a method, the result should not return a new list, just change the list ‘B’.
5. What are the keys of the of the following {‘a’:1,’b’:2}
Module 4: Working with Data in Python
1. What do the following lines of code do? with open(“Example1.txt”,”r”) as file1:
FileContent=file1.readlines()
print(FileContent)
2. What do the following lines of code do? with open(“Example2.txt”,”w”) as writefile:
writefile.write(“This is line A\n”)
writefile.write(“This is line B\n”)
3. What do the following lines of code do? with open(“Example3.txt”,”a”) as file1:
file1.write(“This is line C\n”)
4. What is the result of applying the following method df.head(), to the dataframe df
Module 5: Working with Numpy Arrays
1. 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
2. What is the result of the following lines of code:
a=np.array([0,1])
b=np.array([1,0])
np.dot(a,b)
3. What is the result of the following lines of code:
a=np.array([1,1,1,1,1])
a+10
4. What is the correct code to perform matrix multiplication on the matrix A and B
Python for Data Science Final Exam Answers
1. What is the result of the following operation 3+2*2?
2. What is the type of the following variable: a=True?
3. What is the result of the following operation int(3.2)?
4. Consider the string A=’1234567′, what is the result of the following operation: A[1::2]
5. Consider the string Name=”Michael Jackson” , what is the result of the following operation Name.find(‘el’)
6. The variables A=’1′ and B=’2′ ,what is the result of the operation A+B? you can’t add two strings
7. Consider the variable F=”You are wrong”, Convert the values in the variable F to uppercase?
8. Consider the tuple tuple1=(“A”,”B”,”C” ), what is the result of the following operation tuple1[-1]?
9. Consider the tuple A=((11,12),[21,22]), that contains a tuple and list. What is the result of the following operation A[1]:
10. Consider the tuple A=((11,12),[21,22]), that contains a tuple and list. What is the result of the following operation A[0][1]:
11. What is the result of the following operation ‘1,2,3,4’.split(‘,’)
12. Concatenate the following lists A=[1,’a’] and B=[2,1,’d’]:
13. How do you cast the list ‘A’ to the set ‘a’?
14. Consider the Set: V={‘A’,’B’}, what is the result of V.add(‘C’)?
15. Consider the Set: V={‘A’,’B’,’C’ }, what is the result of V.add(‘C’)?
16. What is the output of the following lines of code:
x=”Go”
if(x!=”Go”):
print(‘Stop’)
else:
print(‘Go ‘)
print(‘Mike’)
17. What is the output of the following lines of code:
x=”Go”
if(x==”Go”):
print(‘Go ‘)
else:
print(‘Stop’)
print(‘Mike’)
- Go Mike
- Mike
- Stop Mike
- The Mike
18. How many iterations are performed in the following loop?
for n in range(3):
print(n)
19. What does the following loop print?
for n in range(3):
print(n+1)
20. What is the output of the following few lines of code ?
A=[‘1′,’2′,’3’]
for a in A:
print(2*a)
21. Consider the function add, what is the result of calling the following Add(‘1′,’1’) (look closely at the return statement )
def Add(x,y):
z=y+x
return(y)
22. Consider the class Points, what are the data attributes:
class Points(object):
def __init__(self,x,y):
self.x=x
self.y=y
def print_point(self):
print(‘x=’,self.x,’y=’,self.y)
23. What is the result of running the following lines of code ?
class Points(object):
def __init__(self,x,y):
self.x=x
self.y=y
def print_point(self):
print(‘x=’,self.x,’ y=’,self.y)
p1=Points(1,2)
p1.print_point()
24. What is the result of running the following lines of code ?
class Points(object):
def __init__(self,x,y):
self.x=x
self.y=y
def print_point(self):
print(‘x=’,self.x,’ y=’,self.y)
p2=Points(1,2)
p2.x=2
p2.print_point()
25. Consider the following line of code: with open(example1,”r”) as file1:
What mode is the file object in?
Wrap Up
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