Ultimate 200 Python Interview Questions 2019 | Mockrabbit

Python Interview Question

Python Programming can be easy to pick up whether you’re a first-time programmer or you have experienced in other languages. It is one of the most widely used programming languages. Despite being slow python is very popular, versatile, dynamic, interactive and remains one of the most relevant languages for the year 2019.

Python is developed under an OSI (open sources license) approved making it freely usable and distributable, even for commercial use. With a focus on code readability, the syntax in python helps the programmers to do coding in fewer steps as compared to Java or C++.

Is Python the Future of Programming language?

Based on an article published by makeuseof stating 6 key reasons, why is the programming language of the future? Covering all the major aspects like why python is popular, which are the big name companies using python programming. Yes, it true! Python is already used by some of the biggest names in tech. companies like Uber, PayPal, Google, Facebook, Intergram, Netflix, Dropbox, and Reddit all use python for their testing and development.

Machine Learning with Python, Python is well supported, Python is the language of education, and the last IT FREE. According to article  Machine learning as a skill is in greater demand every day. A good grasp of the Python programming language puts you a step ahead of others learning it from scratch

Why Machine learning with Python programming?

Let us first understand what is machine learning? its an application of artificial intelligence (AI) that provides systems with the ability to automatically learn and understand from experience not by explicitly programming.

According to one of the articles published by Medium on why Python is the most popular language used for machine learning. In that, they have explained that machine learning focuses on the development of computer programs that can access data and use it to understand and learn to form it. Python is very well known for its readability and less complexity and that makes this language easy to understand.

Why you should use Python Programming?

According to The TIOBE Python is one of the top 5 most popular programming languages. The TIOBE programming community index is an indicator of the popularity of programming languages.

They update the index every month and these ratings are based on the number of skilled engineers world-wide, courses and third party vendors. these indexed and ratings is calculated by popular search engines such as google, bing, yahoo, Wikipedia, Amazon and youtube.

IEEE ranked python as the #1 programming language in 2018. based on the latest annual report by stack overflow, Python is among the top in-demand IT skills in 2019.

Here are the Top 5 reason to choose python

1.Open source Frameworks and tools

2.Readable and maintainable code

3.Compatible with major platforms and systems

4.Large standard library

5.Compatible with major platforms and operating systems

Python Developer Average Salary? 

A Report based on Indeed the average salary of python developer in us is $123K and in India, the average salary is ₹496326. The salary estimation is based on 1557 salaries submitted to indeed by python developer employees.

 Python Interview Questions

1. What is the difference between list and tuples in Python?
2. What are the key features of Python?
3. What type of language is python? Programming or scripting?
4. How is Python an interpreted language?
5. How is memory managed in Python?
6. What is namespace in Python?
7. What is PYTHONPATH?
8. What are python modules? Name some commonly used built-in modules in Python?
9. What are local variables and global variables in Python?
10. Is python case sensitive?
11. What is type conversion in Python?
12. What is pep 8?
13. Is indentation required in python?
14. What is the difference between Python Arrays and lists?
15. What are functions in Python?
16. What is __init__?
17. What is a lambda function?
18. What is self in Python?
19. How does break, continue and pass work?
20. How can you randomize the items of a list in place in Python?
21. What are python iterators?
22. How can you generate random numbers in Python?
23. What is the difference between range & xrange?
24. How do you write comments in python?
25. What is pickling and unpickling?
26. What are the generators in python?
27. How will you capitalize the first letter of string?
28. How to comment on multiple lines in python?
29. What are docstrings in Python?
30. What is the purpose of is, not and in operators?
31. What is the usage of help() and dir() function in Python?
32. Whenever Python exits, why isn’t all the memory de-allocated?
33. What is a dictionary in Python?
34. How can the ternary operators be used in python?
35. What does this mean: *args, **kwargs? And why would we use it?
36. What does len() do?
37. Explain split(), sub(), subn() methods of “re” module in Python.
38. What are negative indexes and why are they used?
39. What are Python packages?
40. How can files be deleted in Python?
41. What are the built-in types of python?
42. What advantages do NumPy arrays offer over (nested) Python lists?
43. How to add values to a python array?
44. How to remove values to a python array?
45. Does Python have OOps concepts?
46. What is the difference between deep and shallow copy?
47. How is Multithreading achieved in Python?
48. What is the process of compilation and linking in python?
49. What are Python libraries? Name a few of them.\n
50. What is split used for?
51. Explain Inheritance in Python with an example.
52. How are classes created in Python?
53. What is monkey patching in Python?
54. Does python support multiple inheritance?
55. What is Polymorphism in Python?
56. Define encapsulation in Python?
57. How do you do data abstraction in Python?
58. Does python make use of access specifiers?
59. How to create an empty class in Python?
60. What does an object() do?
61. Write a program in Python to execute the Bubble sort algorithm.
62. Write a program in Python to produce Star triangle.
63. Write a program to produce Fibonacci series in Python.
64. Write a program in Python to check if a number is prime.
65. Write a program in Python to check if a sequence is a Palindrome.
66. Write a sorting algorithm for a numerical dataset in Python.
67. Looking at the below code, write down the final values of A0, A1, …An.
68. Explain what Flask is and its benefits?
69. Is Django better than Flask?
70. Mention the differences between Django, Pyramid and Flask.
71. Discuss Django architecture.
72. Explain how you can set up the Database in Django.
73. Give an example how you can write a VIEW in Django?
74. Mention what the Django templates consist of.
75. Explain the use of session in Django framework?
76. How To Save An Image Locally Using Python Whose URL Address I Already Know?
77. How can you Get the Google cache age of any URL or web page?
78. What is map function in Python?
79. Is python numpy better than lists?
80. How to get indices of N maximum values in a NumPy array?
81. How do you calculate percentiles with Python/ NumPy?
82. What is the difference between NumPy and SciPy?
83. How do you make 3D plots/visualizations using NumPy/SciPy?
84. Which of the following statements create a dictionary? (Multiple Correct Answers Possible)
85. Which one of these is floor division?
86. What is the maximum possible length of an identifier?
87. Why are local variable names beginning with an underscore discouraged?
88. Which of the following is an invalid statement?
89. Suppose list1 is [2, 33, 222, 14, 25], What is list1[-1] ?
90. To open a file c:scores.txt for writing, we use
91. When will the else part of try-except-else be executed?
92. Name some of the features of Python.
93. What is the purpose of PYTHONPATH environment variable?
94. What is the purpose of PYTHONSTARTUP environment variable?
95. What is the purpose of PYTHONCASEOK environment variable?
96. What is the purpose of PYTHONHOME environment variable?
97. Is python a case sensitive language?
98. What are the supported data types in Python?
99. What are tuples in Python?
100. What is the difference between tuples and lists in Python?
101. What are Python’s dictionaries?
102. How will you create a dictionary in python?
103. How will you get all the keys from the dictionary?
104. How will you get all the values from the dictionary?
105. How will you convert a string to an int in python?
106. How will you convert a string to a long in python?
107. How will you convert a string to a float in python?
108. How will you convert a object to a string in python?
109. How will you convert a object to a regular expression in python?
110. How will you convert a String to an object in python?
111. How will you convert a string to a tuple in python?
112. How will you convert a string to a list in python?
113. How will you convert a string to a set in python?
114. How will you create a dictionary using tuples in python?
115. How will you convert a string to a frozen set in python?
116. How will you convert an integer to a character in python?
117. How will you convert an integer to a Unicode character in python?
118. How will you convert a single character to its integer value in python?
119. How will you convert an integer to hexadecimal string in python?
120. How will you convert an integer to octal string in python?
121. What is the purpose of // operator?
122. What is the purpose of is operator?
123. What is the purpose of not in operator?
124. What is the purpose break statement in python?
125. What is the purpose continue statement in python?
126. What is the purpose pass statement in python?
127. How can you pick a random item from a list or tuple?
128. How can you pick a random item from a range?
129. How can you get a random number in python?
130. How will you set the starting value in generating random numbers?
131. How will you randomizes the items of a list in place?
132. How will you capitalizes first letter of string?
133. How will you check in a string that all characters are alphanumeric?
134. How will you check in a string that all characters are digits?
135. How will you check in a string that all characters are in lowercase?
136. How will you check in a string that all characters are numerics?
137. How will you check in a string that all characters are whitespaces?
138. How will you check in a string that it is properly titlecased?
139. How will you check in a string that all characters are in uppercase?
140. How will you merge elements in a sequence?
141. How will you get the length of the string?
142. How will you convert a string to all lowercase?
143. How will you remove all leading whitespace in string?
144. How will you get the max alphabetical character from the string?
145. How will you get the min alphabetical character from the string?
146. How will you replaces all occurrences of old substring in string with new string?
147. How will you remove all leading and trailing whitespace in string?
148. How will you change case for all letters in string?
149. How will you get titlecased version of string?
150. How will you convert a string to all uppercase?
151. How will you check in a string that all characters are decimal?
152. What is the difference between del() and remove() methods of list?
153. How will you compare two lists?
154. How will you get the length of a list?
155. How will you get the max valued item of a list?
156. How will you get the min valued item of a list?
157. How will you get the index of an object in a list?
158. How will you insert an object at given index in a list?
159. How will you remove last object from a list?
160. How will you remove an object from a list?
161. How will you reverse a list?
162. How will you sort a list?
163. What is lambda function in python?
164. What we call a function which is incomplete version of a function?
165. A canvas can have a foreground color?
166. Is Python platform independent?
167. Do you think Python has a complier?
168. What are the applications of Python?
169. What is the basic difference between Python version 2 and Python version 3?
170. Is there any double data type in Python?
171. Is String in Python are immutable?
172. Can True = False be possible in Python?
173. Which module of python is used to apply the methods related to OS.?
174. When does a new block begin in python?
175. Name the python Library used for Machine learning.
176. What does pass operation do?
177. Name the tools which python uses to find bugs (if any).
178. Mention what is Flask-WTF and what are their features?
179. Mention what is the difference between Django, Pyramid, and Flask?
180. Mention the use of // operator in Python?
181. Explain how can you make a Python Script executable on Unix?
182. Mention what are the rules for local and global variables in Python?
183. Why lambda forms in python does not have statements?
184. What are the built-in type does python provides?
185. What are the tools that help to find bugs or perform static analysis?
186. Explain how can you generate random numbers in Python?
187. Explain what is Dogpile effect? How can you prevent this effect?
188. What is the difference between .py and .pyc files?
189. What is the Pthon interpreter prompt?
190. Explain the use of try: except raise, and finally?
191. In a class definition, what does the __ init_O function do?
192. What happens when a function doesn’t have a return statement? Is this valid?
193. Name the four main types of namespaces in Python?
194. What are the two major loop statements?
195. How do I make a Python script executable on UNIX?
196. How will you get a space-padded string with the original string left-justified to a total of width columns?
197. Which programming Language is an implementation of Python programming language designed to run on Java Platform
198. When a function is defined then the system stores parameters and local variables in an area of memory. What this memory is known as?
199. Write a one-liner that will count the number of capital letters in a file. Your code should work even if the file is too big to fit in memory.
200. You are required to scrap data from IMDb top 250 movies page. It should only have fields movie name, year, and rating

Closing Notes

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