Python Programming Quiz – 7th Week Quiz Solution

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[1] What should be the name of the python file that defines a module foo?

• (a): module.py
• (b): foo_module.py
• (c): module_foo.py
• (d): foo.py

Answer: (d) foo.py

[2]  The following code is saved in a file mod.py (using python 3.X version):

def printHi():
print (“Hi”)

Now consider the following interaction on Python console, assuming mod.py
is in the current directory where the console is invoked:

>>> import mod
>>> printHi()
Traceback
(most recent call last): File “”, line 1, in
NameError: name ‘printHi’ is not defined

What is the reason for the NameError error?

• (a): printHi is a keyword in Python
• (b): printHi is not a valid function name
• (c): We need to qualify function name with module name, as mod.printHi()
• (d): import does not import files in the current directory

Answer: (c) We need to qualify function name with module name, as mod.printHi()

[3] The following code is saved in a file mod.py (using python 3.X version):

def printHi():
print (“Hi”)

Now consider the following interaction on Python console, assuming
mod.py is in the current directory where the console is invoked:

>>> import mod
>>> print (mod.__name__)

What will be the output on the console?

• (a): Hi
• (b): mod.Hi
• (c): mod
• (d): Error since __name__ is not defined

Answer: (c) mod

[4] True or False: It is possible to import more than one modules in the same program?

• (a): True
• (b): False

Answer: (a) True

[5] Suppose we have a python module as file mdl.py defining four functions f1, f2, f3 and f4. Now we give following python command at the python shell:

>>> from mdl import f2

Which of the following functions from mdl.py can now be invoked from calling script –

• (a): f1
• (b): f2
• (c): f3
• (d): f4

Answer: (b) f2

[6] A python module file mdl.py can be used as a script as well as an importable module by adding which of the following code at the end of the file mdl.py:

(A) if _ main _ == “ _ name _ “ :
… # suitable code
(B) if _ main _ == “ _ mdl _ “ :
… # suitable code
(C) if _ name _ == “ _ main _ “ :
… # suitable code
(D) if _ name _ == “ _ mdl _ “ :
… # suitable code

• (a): A
• (b): B
• (c): C
• (d): D

Answer: (c) C

[7]  Suppose we have a python module as file mdl.py defining three functions f1, f2 and f3. Now we give the following python command at the python shell:

>>> from mdl import *

Which of the following functions from mdl.py can be invoked from calling script –

• (a): only f1 and f3
• (b): only f2 and f3
• (c): only f3 and f1
• (d): all of f1, f2 and f3

Answer: (d) all of f1, f2 and f3

[8]  Suppose a python module file mdl.py contains the required code at the end of the file mdl.py so that it can be used as a script as well as an importable module. Now we can run script mdl.py by the following command at python shell:

>>> import mdl

• (a): True
• (b): False

Answer:(b) False

[9] Class construct in python contains:

• (a): data as attributes of objects
• (b): functions as actions on data
• (c): both (a) and (b)
• (d): either (a) or (b)

Answer:(c) both (a) and (b)

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[10]  In python, class is itself an object of type: type.

• (a) True
• (b): False

Answer: (a) True

[11]  What is the output of the following python code?

class hello:
def __init__(self,a=”Visit Prutor.ai website”):
self.a=a

def display(self):
print(self.a)
obj=hello()
obj.display()

• (a): The program has an error because constructor can’t have default arguments
• (b): Nothing is displayed
• (c): “Visit Prutor.ai website” is displayed
• (d): The program has an error because display function doesn’t have parameters

Answer: (c) “Visit Prutor.ai website” is displayed

[12] What is the output of the following python code?

class test:
def __init__(self,x):
self.x=x

def display(self):
print(self.x)
obj=test()
obj.display()

• (a): Executes normally and doesn’t display anything
• (b): Displays 0, which is the automatic default value
• (c): Error as at least one argument is required while creating an object
• (d): Error as display function requires additional argument

Answer: (c) Error as at least one argument is required while creating an object

[13] What does Instantiation mean in terms of Object Oriented Programming?

• (a): Deleting an instance of class
• (b): Creating an instance of class
• (c): Copying an instance of class
• (d): Modifying an instance of class

Answer: (b) Creating an instance of class

[14] Select the correct alternative for special method __init__ in python –

• (a): Is used to create a new object for a class
• (b): Only one constructor is allowed per class
• (c): Uses default arguments
• (d): All of the above

Answer: (d) All of the above

[15] The return value of special method __str__ can be an object of any type in python.

• (a): True
• (b): False

Answer: (b) False

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