Python MCQ Questions | Interview Quick

1. What is an abstract class?

An abstract class is the name for any class from which you can instantiate an object.

Abstract classes must be redefined any time an object is instantiated from them.

Abstract classes must inherit from concrete classes.

An abstract class exists only so that other "concrete" classes can inherit from the abstract class.

2. What happens when you use the build-in function any() on a list?

The any() function will randomly return any item from the list.

The any() function returns True if any item in the list evaluates to True. Otherwise

it returns False.

The any() function takes as arguments the list to check inside

and the item to check for. If "any" of the items in the list match the item to check for

the function returns True.

The any() function returns a Boolean value that answers the question "Are there any items in this list?"

3. What data structure does a binary tree degenerate to if it isn't balanced properly?

linked list

queue

set

OrderedDict

4. What statement about static methods is true?

Static methods are called static because they always return None.

Static methods can be bound to either a class or an instance of a class.

Static methods serve mostly as utility methods or helper methods

since they can't access or modify a class's state.

Static methods can access and modify the state of a class or an instance of a class.

5. What are attributes?

Attributes are long-form version of an if/else statement

used when testing for equality between objects.

Attributes are a way to hold data or describe a state for a class or an instance of a class.

Attributes are strings that describe characteristics of a class.

Function arguments are called "attributes" in the context of class methods and instance methods.

6. What built-in list method would you use to remove items from a list?

.delete() method

pop(my_list)

del(my_list)

.pop() method

7. What is one of the most common use of Python's sys library?

to capture command-line arguments given at a file's runtime

to connect various systems

such as connecting a web front end

an API service

a database

and a mobile app

to take a snapshot of all the packages and libraries in your virtual environment

to scan the health of your Python ecosystem while inside a virtual environment

8. What is the runtime of accessing a value in a dictionary by using its key?

O(n)

also called linear time.

O(log n)

also called logarithmic time.

O(n^2)

also called quadratic time.

O(1)

also called constant time.

9. . What is the correct syntax for defining a class called Game, if it inherits from a parent class called LogicGame?

class Game(LogicGame): pass

def Game(LogicGame): pass

def Game.LogicGame(): pass

class Game.LogicGame(): pass

11. What built-in Python data type is commonly used to represent a stack?

self means that no other arguments are required to be passed into the method.

There is no real purpose for the self method; it's just historic computer science jargon that Python keeps to stay consistent with other programming languages.

self refers to the instance whose method was called.

self refers to the class that was inherited from to create the object using self.

12. What is the purpose of the "self" keyword when defining or calling instance methods?

You can assign a name to each of the namedtuple members and refer to them that way

similarly to how you would access keys in dictionary.

Each member of a namedtuple object can be indexed to directly

just like in a regular tuple.

namedtuples are just as memory efficient as regular tuples.

No import is needed to use namedtuples because they are available in the standard library.

13. Which of these is NOT a characteristic of namedtuples?

Instance methods can modify the state of an instance or the state of its parent class.

Instance methods hold data related to the instance.

An instance method is any class method that doesn't take any arguments.

An instance method is a regular function that belongs to a class

but it must return None.

14. What is an instance method?

It protects the data from outside interference.

A parent class is encapsulated and no data from the parent class passes on to the child class.

It keeps data and the methods that can manipulate that data in one place.

It only allows the data to be changed by methods.

15. Which statement does NOT describe the object-oriented programming concept of encapsulation?

It tells the computer which chunk of code to run if the instructions you coded are incorrect.

It runs one chunk of code if all the imports were successful

and another chunk of code if the imports were not successful.

It executes one chunk of code if a condition is true

but a different chunk of code if the condition is false.

It tells the computer which chunk of code to run if the is enough memory to handle it

and which chunk of code to run if there is not enough memory to handle it.

16. What is the purpose of an if/else statement?

dictionary

set

None. You can only build a queue from scratch.

list

17. What built-in Python data type is best suited for implementing a queue?

my_game = class.Game()

my_game = class(Game)

my_game = Game()

my_game = Game.create()

18. What is the correct syntax for instantiating a new object of the type Game?

It creates a path from multiple values in an iterable to a single value.

It applies a function to each item in an iterable and returns the value of that function.

It converts a complex value type into simpler value types.

It creates a mapping between two different elements of different iterables.

19. What does the built-in map() function do?

The function will return a RuntimeError if you don't return a value.

If the return keyword is absent

the function will return None.

If the return keyword is absent

the function will return True.

The function will enter an infinite loop because it won't know when to stop executing its code.

20. If you don't explicitly return a value from a function, what happens?

It is used to skip the yield statement of a generator and return a value of None.

It is a null operation used mainly as a placeholder in functions

classes

etc.

It is used to pass control from one statement block to another.

It is used to skip the rest of a while or for loop and return to the start of the loop.

21. What is the purpose of the pass statement in Python?

arguments

paradigms

attributes

decorators

22. What is the term used to describe items that may be passed into a function?

slot

dictionary

queue

sorted list

23. Which collection type is used to associate values with unique keys?

when it encounters an infinite loop

when it encounters an if/else statement that contains a break keyword

when it has assessed each item in the iterable it is working on or a break keyword is encountered

when the runtime for the loop exceeds O(n^2)

24. When does a for loop stop iterating?

The runtime is O(n) because in the worst case

the node you are searching for is the last node

and every node in the linked list must be visited.

The runtime is O(nk)

with n representing the number of nodes and k representing the amount of time it takes to access each node in memory.

The runtime cannot be determined unless you know how many nodes are in the singly linked list.

The runtime is O(1) because you can index directly to a node in a singly linked list.

25. Assuming the node is in a singly linked list, what is the runtime complexity of searching for a specific node within a singly linked list?

The all() function returns a Boolean value that answers the question "Are all the items in this list the same?

The all() function returns True if all the items in the list can be converted to strings. Otherwise

it returns False.

The all() function will return all the values in the list.

The all() function returns True if all items in the list evaluate to True. Otherwise

it returns False.

26. What happens when you use the built-in function all() on a list?

backtracking

dynamic programming

decrease and conquer

divide and conquer

27. What is the algorithmic paradigm of quick sort?

O(1)

also called constant time

O(log n)

also called logarithmic time

O(n^2)

also called quadratic time

O(n)

also called linear time

28. What is runtime complexity of the list's built-in .append() method?

A set is an ordered collection unique items. A list is an unordered collection of non-unique items.

Elements can be retrieved from a list but they cannot be retrieved from a set.

A set is an ordered collection of non-unique items. A list is an unordered collection of unique items.

A set is an unordered collection unique items. A list is an ordered collection of non-unique items.

29. What is key difference between a set and a list?

Abstraction means that a different style of code can be used

since many details are already known to the program behind the scenes.

Abstraction means the implementation is hidden from the user

and only the relevant data or information is shown.

Abstraction means that the data and the functionality of a class are combined into one entity.

Abstraction means that a class can inherit from more than one parent class.

30. What is the definition of abstraction as applied to object-oriented Python?

When instantiating an object

the object doesn't inherit any of the parent class's methods.

When instantiating an object

the object will inherit the methods of whichever parent class has more methods.

When instantiating an object

the programmer must specify which parent class to inherit methods from.

An instance of the Game class will inherit whatever methods the BoardGame and LogicGame classes have.

31. Pick correct representation of doctest for function in Python.

a generic object class with iterable parameter fields

a generic object class with non-iterable named fields

a tuple subclass with non-iterable parameter fields

a tuple subclass with iterable named fields

32. Suppose a Game class inherits from two parent classes: BoardGame and LogicGame. Which statement is true about the methods of an object instantiated from the Game class?

&&

=

==

||

33. What does calling namedtuple on a collection type return?

fruit_info ['price'] = 1.5

my_list [3.5] = 1.5

1.5 = fruit_info ['price]

my_list['price'] == 1.5

34. What symbol(s) do you use to assess equality between two elements?

It makes classes aware of each other if more than one class is defined in a single code file.

It is included to preserve backwards compatibility from Python 3 to Python 2

but no longer needs to be used in Python 3.

It is a method that acts as a constructor and is called automatically whenever a new object is created from a class. It sets the initial state of a new object.

It initializes any imports you may have included at the top of your file.

35. What does a class's init() method do?

How many microprocessors it would take to run your code in less than one second

How many lines of code are in your code file

The amount of space taken up in memory as a function of the input size

How many copies of the code file could fit in 1 GB of memory

37. What is the correct syntax for creating a variable that is bound to a dictionary?

self refers to the class that was inherited from to create the object using self.

There is no real purpose for the self method. It's just legacy computer science jargon that Python keeps to stay consistent with other programming languages.

self means that no other arguments are required to be passed into the method.

self refers to the instance whose method was called.

38. What is the purpose of the self keyword when defining or calling methods on an instance of an object?

A class method is a regular function that belongs to a class

but it must return None.

A class method can modify the state of the class

but they can't directly modify the state of an instance that inherits from that class.

A class method is similar to a regular function

but a class method doesn't take any arguments.

A class method hold all of the data for a particular class.

39. What statement about the class methods is true?

You did not use very many advanced computer programming concepts in your code.

The difficulty level your code is written at is not that high.

It will take your program less than half a second to run.

The amount of time it takes the function to complete grows linearly as the input size increases.

40. What does it mean for a function to have linear runtime?

def getMaxNum(list_of_nums): # body of function goes here

func get_max_num(list_of_nums): # body of function goes here

func getMaxNum(list_of_nums): # body of function goes here

def get_max_num(list_of_nums): # body of function goes here

41. What is the proper way to define a function?

in camel case without using underscores to separate words -- e.g. maxValue = 255

in lowercase with underscores to separate words -- e.g. max_value = 255

in all caps with underscores separating words -- e.g. MAX_VALUE = 255

in mixed case without using underscores to separate words -- e.g. MaxValue = 255

42. According to the PEP 8 coding style guidelines, how should constant values be named in Python?

A deque adds items to one side and remove items from the other side.

A deque adds items to either or both sides

but only removes items from the top.

A deque adds items at either or both ends

and remove items at either or both ends.

A deque adds items only to the top

but remove from either or both sides.

44. What is the correct syntax for creating a variable that is bound to a set?

For any given node in a binary search tree

the value of the node is greater than all the values in the node's left subtree and less than the ones in its right subtree.

Binary Search Tree cannot be used to organize and search through numeric data

given the complication that arise with very deep trees.

The top node of the binary search tree would be an arbitrary number. All the nodes to the left of the top node need to be less than the top node's number

but they don't need to ordered in any particular way.

The smallest numeric value would go in the top most node. The next highest number would go in its left child node

the the next highest number after that would go in its right child node. This pattern would continue until all numeric values were in their own node.

45. What is the correct syntax for defining an init() method that takes no parameters?

A decorator is similar to a class and should be used if you are doing functional programming instead of object oriented programming.

A decorator is a visual indicator to someone reading your code that a portion of your code is critical and should not be changed.

You use the decorator to alter the functionality of a function without having to modify the functions code.

An import statement is preceded by a decorator

python knows to import the most recent version of whatever package or library is being imported.

46. Which of the following is TRUE About how numeric data would be organised in a Binary Search Tree?

Only in some situations

as loops are used only for certain type of programming.

When you need to check every element in an iterable of known length.

When you want to minimize the use of strings in your code.

When you want to run code in one file for a function in another file.

47. Why would you use a decorator?

You do not have to alter the state of the element the algorithm is recursing on.

You would eventually get a KeyError when the recursive portion of the code ran out of items to recurse on.

You would get a RuntimeError: maximum recursion depth exceeded.

The function using recursion would return None.

48. When would you use a for loop?

The runtime for searching in a binary search tree is O(1) because each node acts as a key

similar to a dictionary.

The runtime for searching in a binary search tree is O(n!) because every node must be compared to every other node.

The runtime for searching in a binary search tree is generally O(h)

where h is the height of the tree.

The runtime for searching in a binary search tree is O(n) because every node in the tree must be visited.

49. What is the most self-descriptive way to define a function that calculates sales tax on a purchase?

You use a mixin to force a function to accept an argument at runtime even if the argument wasn't included in the function's definition.

You use a mixin to allow a decorator to accept keyword arguments.

You use a mixin to make sure that a class's attributes and methods don't interfere with global variables and functions.

If you have many classes that all need to have the same functionality

you'd use a mixin to define that functionality.

50. What would happen if you did not alter the state of the element that an algorithm is operating on recursively?

Add items to a stack in O(1) time and remove items from a stack on O(n) time.

Add items to a stack in O(1) time and remove items from a stack in O(1) time.

Add items to a stack in O(n) time and remove items from a stack on O(1) time.

Add items to a stack in O(n) time and remove items from a stack on O(n) time.

51. What is the runtime complexity of searching for an item in a binary search tree?

a stacks adds items to one side and removes items from the other side.

a stacks adds items to the top and removes items from the top.

a stacks adds items to the top and removes items from anywhere in the stack.

a stacks adds items to either end and removes items from either end.

52. Why would you use mixin?

A base case is the condition that allows the algorithm to stop recursing. It is usually a problem that is small enough to solve directly.

The base case is summary of the overall problem that needs to be solved.

The base case is passed in as an argument to a function whose body makes use of recursion.

The base case is similar to a base class

in that it can be inherited by another object.

53. What is the runtime complexity of adding an item to a stack and removing an item from a stack?

The with keyword lets you choose which application to open the file in.

The with keyword acts like a for loop

and lets you access each line in the file one by one.

There is no benefit to using the with keyword for opening a file in Python.

When you open a file using the with keyword in Python

Python will make sure the file gets closed

even if an exception or error is thrown.

54. Which statement accurately describes how items are added to and removed from a stack?

Virtual environments create a "bubble" around your project so that any libraries or packages you install within it don't affect your entire machine.

Teams with remote employees use virtual environments so they can share code

do code reviews

and collaborate remotely.

Virtual environments were common in Python 2 because they augmented missing features in the language. Virtual environments are not necessary in Python 3 due to advancements in the language.

Virtual environments are tied to your GitHub or Bitbucket account

allowing you to access any of your repos virtually from any machine.

55. What is a base case in a recursive function?

python3 -m doctest <_filename_>

python3 <_filename_>

python3 <_filename_> rundoctests

python3 doctest

56. Why is it considered good practice to open a file from within a Python script by using the with keyword?

any function that makes use of scientific or mathematical constants

often represented by Greek letters in academic writing

a function that get executed when decorators are used

any function whose definition is contained within five lines of code or fewer

a small

anonymous function that can take any number of arguments but has only expression to evaluate

58. What is the correct way to run all the doctests in a given file from the command line?

None

An iterable object

A linked list data structure from a non-empty list

All the keys of the given dictionary

59. What is a lambda function ?

Instance attributes can be changed

but class attributes cannot be changed

Class attributes are shared by all instances of the class. Instance attributes may be unique to just that instance

There is no difference between class attributes and instance attributes

Class attributes belong just to the class

not to instance of that class. Instance attributes are shared among all instances of a class

61. What does a generator return?

-- This is a comment

# This is a comment

/_ This is a comment _\

// This is a comment

62. What is the difference between class attributes and instance attributes?

orange = my_list[1]

my_list[1] = 'orange'

my_list['orange'] = 1

my_list[1] == orange

63. What is the correct syntax of creating an instance method?

Nothing will happen; your computer knows when to stop running the code in the while loop.

You will get a KeyError.

Your code will get stuck in an infinite loop.

You will get a WhileLoopError.

64. What is the correct way to call a function?

A queue adds items to either end and removes items from either end.

A queue adds items to the top and removes items from the top.

A queue adds items to the top

and removes items from anywhere in

a list.

A queue adds items to the top and removes items from anywhere in the queue.

65. How is comment created?

defaultdict will automatically create a dictionary for you that has keys which are the integers 0-10.

defaultdict forces a dictionary to only accept keys that are of the types specified when you created the defaultdict (such as strings or integers).

If you try to read from a defaultdict with a nonexistent key

a new default key-value pair will be created for you instead of throwing a KeyError.

defaultdict stores a copy of a dictionary in memory that you can default to if the original gets unintentionally modified.

66. What will happen if you use a while loop and forget to include logic that eventually causes the while loop to stop?

fruit_info['variety'] == 'Red Delicious'

fruit_info['variety'] = 'Red Delicious'

red_delicious = fruit_info['variety']

red_delicious == fruit_info['variety']

67. Describe the functionality of a queue?

when you want to minimize the use of strings in your code

when you want to run code in one file while code in another file is also running

when you want some code to continue running as long as some condition is true

when you need to run two or more chunks of code at once within the same file

68. Which choice is the most syntactically correct example of the conditional branching?

Intersect; union

|; &

&; |

&&; ||

70. What is the correct syntax for adding a key called variety to the fruit_info dictionary that has a value of Red Delicious?

Make sure the file is on the system PATH

Create a symbolic link to allow better access to the file

Copy the file to the same directory as where the script is running from

Add the path to the file to the PYTHONPATH environment variable

71. When would you use a while loop?

a set of all the multiples of 3 less then 100

a set of all the number from 0 to 100 multiplied by 3

a list of all the multiples of 3 less then 100

a set of all the multiples of 3 less then 100 excluding 0

72. What is the correct syntax for defining an init() method that sets instance-specific attributes upon creation of a new class instance?

Perform integer division

Perform operations on exponents

Find the remainder of a division operation

Perform floating point division

73. In Python, when using sets, you use _ to calculate the intersection between two sets and _ to calculate the union.

datetime

dateday

daytime

timedate

74. You encounter a FileNotFoundException while using just the filename in the open function. What might be the easiest solution?

def Game(): pass

def Game: pass

class Game: pass

class Game(): pass

75. What does the // operator in Python 3 allow you to do?

my_game = Game(self) self.my_game.roll_dice()

my_game = Game() self.my_game.roll_dice()

my_game = Game() my_game.roll_dice()

my_game = Game(self) my_game.roll_dice(self)

76. What file is imported to use dates in python?

{0

2}

[2]

{2}

[0

2

0

0]

77. What is the correct syntax for defining a class called Game?

17

4

0

3

79. Elements surrounded by [] are _, {} are _, and () are _.

sets only; lists or dictionaries; tuples

lists; sets only; tuples

tuples; sets or lists; dictionaries

lists; dictionaries or sets; tuples

80. Which syntax correctly creates a variable that is bound to a tuple?

[2

4]

[3

4]

[4]

[1

2]

81. Which mode is not a valid way to access a file from within a Python script?

The number is 3

the number is 3

THE NUMBER IS 3

It throws a TypeError because the integer must be cast to a string.

83. What built-in Python data type can be used as a hash table?

write('w')

scan('s')

append('a')

read('r')

84. Which Python function allows you to execute Linux shell commands in Python?

vectorization

attributions

accelaration

functional programming

85. When an array is large, NumPy will not print the entire array when given the built-in print function. What function can you use within NumPy to force it to print the entire array?

set

list

tuple

dictionary

86. When would you use a try/except block in code?

sys.exc_info()

os.system()

os.getcwd()

sys.executable

87. In Python, how can the compiler identify the inner block of a for loop?

set_printparams

set_printoptions

set_fullprint

setp_printwhole

88. What Python mechanism is best suited for telling a user they are using a deprecated function

You use try/except blocks when you want to run some code

but need a way to execute different code if an exception is raised.

You use try/except blocks inside of unit tests so that the unit testes will always pass.

You use try/except blocks so that you can demonstrate to your code reviewers that you tried a new approach

but if the new approach is not what they were looking for

they can leave comments under the except keyword.

You use try/except blocks so that none of your functions or methods return None.

89. Given that NumPy is imported as np, which choice will return True?

because of the level of indentation after the for loop

because of the end keyword at the end of the for loop

because of the block is surrounded by brackets ({})

because of the blank space at the end of the body of the for loop

90. How do you add a comment to existing Python script?

sys.stdout

traceback

warnings

exceptions

92. What is the correct syntax for creating a variable that is bound to a list?

my_keys = fruit_info.to_keys()

my_keys = fruit_info.all_keys()

my_keys = fruit_info.keys

my_keys = fruit_info.keys()

93. What are the two main data structures in the Pandas library?

name is a reserved word.

Underscores are not allowed in function names.

A non-default argument follows a default argument.

There is nothing wrong with this function definition.

94. Suppose you have a variale named vector of type np.array with 10,000 elements. How can you turn vector into a variable named matrix with dimensions 100x100?

// This is a comment

# This is a comment

-- This is a comment

/* This is a comment *\

95. Which choice is an immutable data type?

linalg.eig() and .matmul()

linalg.inv() and .dot()

linalg.det() and .dot()

linalg.inv() and .eye()

97. Which choice is not a native numerical type in Python?

mode

average

mean

median

98. Given a list defined as numbers = [1,2,3,4], what is the value of numbers[-2]?

Arrays and DataFrames

Series and Matrixes

Matrixes and DataFrames

Series and DataFrames

99. Which statement about strings in Python is true?

matrix = (vector.shape = (100

100))

matrix = vector.to_matrix(100

100)

matrix = matrix(vector

100

100)

matrix = vector.reshape(100

100)

100. What is the correct syntax for defining an init() method that takes no parameters?

dictionnary

list

set

string

101. Suppose you need to use the sin function from the math library. What is the correct syntax for importing only that function?

Anonymous Class

Parent Class

Nested Class

Abstract Class

102. What do you get if you apply numpy.sum() to a list that contains only Boolean values?

a dictionary with x as a key

and x squared as its value; from 1 to 100

a dictionary with x as a key

and x squared as its value; from 1 to 99

a set of tuples

consisting of (x

x squared); from 1 to 99

a list with all numbers squared from 1 to 99

103. If you do not explicitly return a value from a function, what happens?

Long

Int

Float

Double

105. What do you need to do to install additional packages into Python?

1

3

2

An IndexError exception is thrown.

106. When using NumPy in Python, how do you check the dimensionality (number and length of dimensions) of an object called my_object?

Strings can be enclosed by double quotes (") or single quotes (').

Strings can only be enclosed in single quotes (').

Single character strings must be enclosed in single quotes (')

and the rest must be enclosed in double quotes (").

Strings can only be enclosed in double quotes (").

107. Assume you have a non-empty list named mylist and you want to search for a specific value. The minimum number of comparison will be __ and the maximum number of comparison will be _?

definit(self): pass

classinit(self): pass

classinit(): pass

definit(): pass

108. If a function does not have a return statement, what does it really return?

using math.sin

import math.sin

from math import sin

import sin from math

109. What is a common use of python's sys library?

0

the count of all True values

a type error

None

110. In Python, a class method must have as a function decorator, and the first parameter of the method will be a reference to .

True

foo

You will get an error message because constant integer values are not classes.

bar

111. Which snippet of code will print My name is Joffrey, son of Robert?

If the return keyword is absent

the function will return True.

The function will enter an infinite loop because it will not know when to stop executing its code.

The function will return a RuntimeError if you do not return a value.

If the return keyword is absent the function will return None.

112. Suppose you have a variable named vector of type np.array with 10.000 elements. How can you turn vector into a variable named matrix with dimensions 100x100?

string; numerical

unstructured; structured

numerical; tabular

tabular; numerical

113. What is the maximum length of a Python identifier?

Use a C compiler like gcc or clang.

Use a package manager like pip or conda.

Use an IDE like Notepad++ or Idle.

Use a package manager like NPM or NuGet.

114. f-strings are also called:

a: all integers from 0 to 99 (inclusive) b: all even integers from 50 to 58 (inclusive)

a: all integers from 0 to 100 (inclusive) b: all even integers from 50 to 60 (inclusive)

a: all integers from 0 to 99 (inclusive) b: all even integers from 50 to 60 (inclusive)

a: all integers from 0 to 99 (inclusive) b: all odd integers from 49 to 59 (inclusive)

115. How many CPUs (or cores) will the Python threading library take advantage of simultaneously?

my_object.get_shape()

my_object.shape

my_object.dim()

len(my_object)

116. The process of pickling in Python includes?

len(mylist); len(mylist)

1; len(mylist)

2; len(mylist)

0; len(mylist)

117. Is list mutable in python ?

0

True

None

False

118. Who created the Python programming language?

to capture command-line arguments given at a file's runtime

to take a snapshot of all the packages and libraries in your virtual environment

to connect various systems

such as connecting a web front end

an API service

a database

and a mobile app

to scan the health of your Python ecosystem while inside a virtual environment

119. Which collection is ordered, changeable, and allows duplicate members?

columnsMat1; rowsMat1;

columnsMat1; rowsMat2;

columnsMat1; columnsMat2;

columnsMat2; rowsMat1;

120. Which comparison of lists and tuples in Python is correct?

@classmethod; the class

inline; the class

static; self

@static; self

121. Which of the following statements defines a new object type named "Dog" in Python?

a list with all the even numbers less than 2*n

a dictionary with all the even numbers less than 2*n

a list with all the odd numbers less than 2*n

a list with all the even numbers less than or equal to 2*n

122. To use pipelines in scikit-learn, import from the scikit-learn._ submodule.

C

A B

B

A

Python MCQ With Answers

Python Interview Questions for Freshers

Python MCQ

1. What is an abstract class?

2. What happens when you use the build-in function any() on a list?

3. What data structure does a binary tree degenerate to if it isn't balanced properly?

4. What statement about static methods is true?

5. What are attributes?

6. What built-in list method would you use to remove items from a list?

7. What is one of the most common use of Python's sys library?

8. What is the runtime of accessing a value in a dictionary by using its key?

9. . What is the correct syntax for defining a class called Game, if it inherits from a parent class called LogicGame?

10. . What is the correct way to write a doctest?

11. What built-in Python data type is commonly used to represent a stack?

12. What is the purpose of the "self" keyword when defining or calling instance methods?

13. Which of these is NOT a characteristic of namedtuples?

14. What is an instance method?

15. Which statement does NOT describe the object-oriented programming concept of encapsulation?

16. What is the purpose of an if/else statement?

17. What built-in Python data type is best suited for implementing a queue?

18. What is the correct syntax for instantiating a new object of the type Game?

19. What does the built-in map() function do?

20. If you don't explicitly return a value from a function, what happens?

21. What is the purpose of the pass statement in Python?

22. What is the term used to describe items that may be passed into a function?

23. Which collection type is used to associate values with unique keys?

24. When does a for loop stop iterating?

25. Assuming the node is in a singly linked list, what is the runtime complexity of searching for a specific node within a singly linked list?

26. What happens when you use the built-in function all() on a list?

27. What is the algorithmic paradigm of quick sort?

28. What is runtime complexity of the list's built-in .append() method?

29. What is key difference between a set and a list?

30. What is the definition of abstraction as applied to object-oriented Python?

31. Pick correct representation of doctest for function in Python.

32. Suppose a Game class inherits from two parent classes: BoardGame and LogicGame. Which statement is true about the methods of an object instantiated from the Game class?

33. What does calling namedtuple on a collection type return?

34. What symbol(s) do you use to assess equality between two elements?

35. What does a class's __init__() method do?

36. What is meant by the phrase "space complexity"?

37. What is the correct syntax for creating a variable that is bound to a dictionary?

38. What is the purpose of the self keyword when defining or calling methods on an instance of an object?

39. What statement about the class methods is true?

40. What does it mean for a function to have linear runtime?

41. What is the proper way to define a function?

42. According to the PEP 8 coding style guidelines, how should constant values be named in Python?

43. Describe the functionality of a deque.

44. What is the correct syntax for creating a variable that is bound to a set?

45. What is the correct syntax for defining an __init__() method that takes no parameters?

46. Which of the following is TRUE About how numeric data would be organised in a Binary Search Tree?

47. Why would you use a decorator?

48. When would you use a for loop?

49. What is the most self-descriptive way to define a function that calculates sales tax on a purchase?

50. What would happen if you did not alter the state of the element that an algorithm is operating on recursively?

51. What is the runtime complexity of searching for an item in a binary search tree?

52. Why would you use mixin?

53. What is the runtime complexity of adding an item to a stack and removing an item from a stack?

54. Which statement accurately describes how items are added to and removed from a stack?

55. What is a base case in a recursive function?

56. Why is it considered good practice to open a file from within a Python script by using the with keyword?

57. Why would you use a virtual environment?

58. What is the correct way to run all the doctests in a given file from the command line?

59. What is a lambda function ?

60. What is the primary difference between lists and tuples?

61. What does a generator return?

62. What is the difference between class attributes and instance attributes?

63. What is the correct syntax of creating an instance method?

64. What is the correct way to call a function?

65. How is comment created?

66. What will happen if you use a while loop and forget to include logic that eventually causes the while loop to stop?

67. Describe the functionality of a queue?

68. Which choice is the most syntactically correct example of the conditional branching?

69. How does defaultdict work?

70. What is the correct syntax for adding a key called variety to the fruit_info dictionary that has a value of Red Delicious?

71. When would you use a while loop?

72. What is the correct syntax for defining an __init__() method that sets instance-specific attributes upon creation of a new class instance?

73. In Python, when using sets, you use _ to calculate the intersection between two sets and _ to calculate the union.

74. You encounter a FileNotFoundException while using just the filename in the open function. What might be the easiest solution?

75. What does the // operator in Python 3 allow you to do?

76. What file is imported to use dates in python?

77. What is the correct syntax for defining a class called Game?

35. What does a class's init() method do?

45. What is the correct syntax for defining an init() method that takes no parameters?

72. What is the correct syntax for defining an init() method that sets instance-specific attributes upon creation of a new class instance?

110. In Python, a class method must have as a function decorator, and the first parameter of the method will be a reference to .

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