python quiz 7

 

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Q.1. Naming convention of a module of a python file is ?

1.All names should be lower case

2.Under score can be used

3.Should be short

4.All of the above

ANSWER :- (4) Naming  convention of a module should be short , have all-lowercase names. And underscores can be used in the module name as it improves readability.

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Q.2. The following code is saved in a file hello.py (using python 3.X version):
     def print_hello():
    print ('Hello')
Now consider the following interaction on Python console, assuming hello.py is in the current directory where the console is invoked:
 import hello
 hello.print_hello()

What will be the output of the code ?

1.hello is a keyword in python , so it will produce error

2.'Hello' will be printed( without quotes)

3.Nothing will be printed

4.We can not import a .py file

ANSWER :- (4) Here it uses import fuction which imports the file from another location and thus by using it we can use functions of that imported file thus here it will print hello without quotes from imported file.

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Q.3.
class hello:
    def __init__(self,a='Visit Prutor.ai website'):
        self.a=a
    def display(self):
        return 0
obj=hello()
print( obj.display() )

1.The program has an error because constructor can’t have default arguments

2.0

3.'Visit Prutor.ai website' is displayed

4.The program has an error because display function doesn’t have parameters

ANSWER :- (2) Here constructor will set the value of variable given and then execute print(obj.display()) fuction and then return 0 will be executed which gives 0 as output on the screen.

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Q.4.
class test:
    def __init__(self,x=''):
        self.x=x
    def display(self):
        print(self.x)
obj=test()
obj.display()

1.Executes normally and doesn’t display anything

2.Displays 0, which is the automatic default value

3.Error as display function requires additional argument

4.None of the above

ANSWER :- (1) Here full program will be executed normally with no errors but display blank screen as output as here nothing is given in input.

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Q.5. What does Instantiation mean in terms of Object Oriented Programming?

1.Deleting an instance of class

2.Creating an instance of class

3.Copying an instance of class

4.Modifying an instance of class

ANSWER :- (2) Instantiation in oops is creating a class or object. it is the realization of a predefined object, generally an object is declared giving it a unique identity name so that it may be used in a program.

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