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Python interview questions

Python interview questions.

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1.

Name some characteristics of Python?

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2.

How do I modify a string?

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3.

What are the built-in types available In Python?

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4.

Name some benefits of Python

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5.

Why would you use the "pass" statement?

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6.

What are local variables and global variables in Python?

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7.

What are descriptors?

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8.

What Is The Benefit Of Using Flask?

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9.

Does Python have a switch-case statement?

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10.

What is pickling and unpickling?

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11.

When to use a tuple vs list vs dictionary in Python?

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12.

What is negative index in Python?

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13.

Suppose lst is 2, 33, 222, 14, 25, What is lst-1?

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14.

How do you list the functions in a module?

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15.

What is PEP 8?

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16.

What are some drawbacks of the Python language?

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17.

What is lambda functions in Python?

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18.

What are the rules for local and global variables in Python?

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19.

Given variables a and b, switch their values so that b has the value of a, and a has the value of b without using an intermediary variable.

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20.

Explain how does Python memory management work?

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21.

What are decorators in Python?

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22.

What are the Dunder/Magic/Special methods in Python? Name a few.

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23.

What is the process of compilation and linking in Python?

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24.

What is monkey patching and is it ever a good idea?

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25.

What are immutable objects in Python?

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26.

What's the difference between lists and tuples?

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27.

What is the python “with” statement designed for?

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28.

Explain the UnboundLocalError exception and how to avoid it?

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29.

What does this stuff mean: *args, **kwargs? And why would we use it?

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30.

How can you share global variables across modules?

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31.

What is the function of “self”?

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32.

What is the difference between range and xrange functions in Python 2.X?

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33.

What's the difference between the list methods append() and extend()?

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34.

What are the wheels and eggs? What is the difference?

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35.

What are the key differences between Python 2 and 3?

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36.

After executing the above code, what is the value of y?

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37.

What are virtualenvs?

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38.

What is the difference between range and xrange? How has this changed over time?

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39.

What is a "callable"?

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40.

Is it possible to have static methods in Python?

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41.

What is a None value?

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42.

What Is Flask-WTF And What Are Their Features?

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43.

How can I create a copy of an object in Python?

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44.

What is namespace in Python?

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45.

How the string does get converted to a number?

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46.

What does the Python nonlocal statement do (in Python 3.0 and later)?

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47.

What is introspection/reflection and does Python support it?

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48.

Is this valid in Python and why?

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49.

How do I check if a list is empty?

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50.

How to make a flat list out of list of lists?

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51.

What is the most efficient way to concatenate many strings together?

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52.

Write a program to check whether the object is of a class or its subclass.

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53.

Can you explain closures (as they relate to Python)?

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54.

Why are Python's 'private' methods not actually private?

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55.

Is there a tool to help find bugs or perform static analysis?

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56.

What's the difference between a Python module and a Python package?

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57.

What is an alternative to GIL?

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58.

What is the purpose of the single underscore “_” variable in Python?

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59.

What is GIL?

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60.

What is MRO in Python? How does it work?

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61.

How is set() implemented internally?

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62.

What is the difference between @staticmethod and @classmethod?

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63.

Explain how you reverse a generator?

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64.

What is monkey patching? How to use it in Python?

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65.

Why are default values shared between objects?

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66.

Whenever you exit Python, is all memory de-allocated?

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67.

How is memory managed in Python?

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68.

What is Cython?

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69.

What is the difference between old style and new style classes in Python?

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70.

Why aren't python nested functions called closures?

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71.

What does an 'x = y or z' assignment do in Python?

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72.

What is the difference between deep and shallow copy?

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73.

What are metaclasses in Python?

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74.

How to work with transitive dependencies?

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75.

What are the advantages of NumPy over regular Python lists?

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76.

Is it a good idea to use multi-thread to speed your Python code?

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77.

Why Python (CPython and others) uses the GIL?

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78.

Is there a simple, elegant way to define singletons?

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79.

What is a global interpreter lock (GIL) and why is it an issue?

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80.

Why isn't all memory freed when Python exits?

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81.

Describe Python's garbage collection mechanism in brief.

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82.

Why use else in try/except construct in Python?

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83.

Why would you use metaclasses?

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84.

Is there any downside to the -O flag apart from missing on the built-in debugging information?

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85.

What does Python optimization (-O or PYTHONOPTIMIZE) do?

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86.

Will the code below work? Why or why not?

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87.

Create function that similar to os.walk

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88.

What will be the output of the code below?

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89.

How to make a chain of function decorators?

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90.

How do I write a function with output parameters (call by reference)

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91.

What will be returned by this code?

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92.

Show me three different ways of fetching every third item in the list

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93.

How to read a 8GB file in Python?

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94.

How should one access nonlocal variables in closures in python 2.x?

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95.

What will this code return?

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96.

How do I access a module written in Python from C?

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