Python Interview Questions 16-20
Let’s start with the 4th set of Python Interview Questions. Mostly, the product-based companies in India ask these questions in the first round of interviews for Business Intelligence Engineer/Data Analyst/Business Analyst/Data Scientist
Python Interview Questions
16. Interchange first and last element in a list
l = [1,2,3,5,6]
temp = l[0]
l[0] = l[len(l)-1]
l[len(l)-1] = temp
print(l)
or
l = [4,5,6,7,8]
print("List",l)
def inter(l):
l[0],l[-1] = l[-1],l[0]
return l
print(“Interchanged List” , inter(l))
17. Swap two positions in a list
p1 = 2
p2 = 5
l = [1,2,3,4,5,6,7]
print("Original List",l)
def swap(l,p1,p2):
l[p1],l[p2] = l[p2],l[p1]
return l
print("Swaped list", swap(l,p1,p2))
18. To check if a particular element is there in the list
l = ['a','b','d']
count = l.count('d')
print(count)
or
l_set = set(l)
if 'b' in l_set:
print("Mil gaya")
or
Use a naive method of loop
for i in range(0,len(l)):
if l[i] == 'd':
print("Mil gaya at",i)
19. Get the sum of elements in a list
l = [1,3,5,6]
s = 0
for i in range(0,len(l)):
s = s+l[i]
print(s)
or
list1 = [9,8,7,6]
def sumOfList(list, size):
if (size == 0):
return 0
else:
return list[size - 1] + sumOfList(list, size - 1)
total = sumOfList(list1, len(list1))
print("Sum of all elements in given list: ", total)
20. Multiple all the numbers in a list
l = [1,3,5,6]
m = 1
for i in range(0,len(l)):
s = s*l[i]
print(s)
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Individual 50+ e-books on separate topics
Important Resources to crack interviews (Mostly Free)
There are a few things which might be very useful for your preparation
The Data Monk Youtube channel – Here you will get only those videos that are asked in interviews for Data Analysts, Data Scientists, Machine Learning Engineers, Business Intelligence Engineers, Analytics Manager, etc.
Go through the watchlist which makes you uncomfortable:-
All the list of 200 videos
Complete Python Playlist for Data Science
Company-wise Data Science Interview Questions – Must Watch
All important Machine Learning Algorithm with code in Python
Complete Python Numpy Playlist
Complete Python Pandas Playlist
SQL Complete Playlist
Case Study and Guesstimates Complete Playlist
Complete Playlist of Statistics
