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Free PCPP-32-101 Exam Braindumps (page: 4)

Page 3 of 12
PDF with 45 Questions

Which function or operator should you use to obtain the answer True or False to the question: "Do two variables refer to the same object?"

  1. The = operator
  2. The isinstanceO function
  3. The id () function
  4. The is operator

Answer(s): D

Explanation:

To test whether two variables refer to the same object in memory, you should use the is operator. The is operator returns True if the two variables point to the same object in memory, and False otherwise.

For example:

a = [1, 2, 3]
b = a
c = [1, 2, 3]

print(a is b) # True
print(a is c) # False

In this example, a and b refer to the same list object in memory, so a is b returns True. On the other hand, a and c refer to two separate list objects with the same values, so a is c returns False.


Reference:

Official Python documentation on
Comparisons: https://docs.python.org/3/reference/expressions.html#not-in Official Python documentation on Identity
comparisons: https://docs.python.org/3/reference/expressions.html#is

The is operator is used to test whether two variables refer to the same object in memory. If two variables x and y refer to the same object, the expression x is y will evaluate to True. Otherwise, it will evaluate to False.



Which sentence about the ©property decorator is false?

  1. The ©property decorator should be defined after the method that is responsible for setting an encapsulated attribute.
  2. The @property decorator designates a method which is responsible for returning an attribute value
  3. The ©property decorator marks the method whose name will be used as the name of the instance attribute
  4. The ©property decorator should be defined before the methods that are responsible for setting and deleting an encapsulated attribute

Answer(s): A

Explanation:

The @property decorator should be defined after the method that is responsible for setting an encapsulated attribute is a false sentence. In fact, the @property decorator should be defined before the method that is used to set the attribute value. The @property decorator and the setter and deleter methods work together to create an encapsulated attribute, which is used to provide control over the attribute's value.


Reference:

Official Python documentation on
Property: https://docs.python.org/3/library/functions.html#property The @property decorator is used to designate a method as a getter for an instance attribute. The method decorated with @property should be defined before any setter or deleter methods for the same attribute.



Select the true statement about the___name___attribute.

  1. ___name___is a special attribute, which is inherent for both classes and instances, and it contains information about the class to
    which a class instance belongs.
  2. ___name is a special attribute, which is inherent for both classes and instances, and it contains a dictionary of object attributes.
  3. __name___is a special attribute, which is inherent for classes and it contains information about the class to which a class instance
    belongs.
  4. __name___is a special attribute, which is inherent for classes, and it contains the name of a class.

Answer(s): D

Explanation:

The true statement about the __name__ attribute is D. name is a special attribute, which is inherent for classes, and it contains the name of a class. The __name__ attribute is a special attribute of classes that contains the name of the class as a string. The __name__ attribute is a special attribute in Python that is available for all classes, and it contains the name of the class as a string. The __name__ attribute can be accessed from both the class and its instances using the dot notation.


Reference:

Official Python documentation on Classes: https://docs.python.org/3/tutorial/classes.html#class-objects



What is a static method?

  1. A method that works on the class itself
  2. A method decorated with the @method trait
  3. A method that requires no parameters referring to the class itself
  4. A method that works on class objects that are instantiated

Answer(s): C

Explanation:

A static method is a method that belongs to a class rather than an instance of the class. It is defined using the @staticmethod decorator and does not take a self or cls parameter. Static methods are often used to define utility functions that do not depend on the state of an instance or the class itself.






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