In Scikit-learn, the ____ class is used for feature scaling.
- DecisionTree
- KMeans
- LinearRegression
- StandardScaler
In Scikit-learn, the StandardScaler class is used for feature scaling. Feature scaling is crucial in machine learning to ensure that all features have the same scale, preventing some features from dominating others during model training. StandardScaler standardizes features by removing the mean and scaling to unit variance.
In Scikit-learn, the ____ method is used to calculate the accuracy of the model on the test data.
- evaluate
- fit
- predict
- score
In Scikit-learn, the score method is used to calculate various metrics, including accuracy, to evaluate the performance of a machine learning model on test data. This method compares the model's predictions to the true labels and returns the accuracy score.
In Python, the ____ method of a unittest TestCase is run before each test method is executed.
- init
- setUp
- start
- tearDown
In Python's unittest framework, the setUp method is executed before each test method. It is typically used to set up any preconditions or resources needed for the tests.
In Python, the ____ statement can be used to assert that a certain expression is true, typically used for debugging purposes.
- assert
- debug
- validate
- verify
The assert statement in Python is used to check whether a given expression is true. If the expression is false, it raises an AssertionError exception, which is helpful for debugging and ensuring that assumptions in your code hold true.
In Python, _____ is a special method used to overload the ‘+’ operator for custom objects.
- add
- overload
- plus
- sum
In Python, the __add__ method is used to overload the + operator for custom objects. This allows you to define custom behavior when two objects of your class are added together using the + operator.
In Python, a ____ is a file containing Python definitions and statements intended for use in other Python programs.
- library
- module
- package
- script
In Python, a module is a file containing Python definitions and statements. These modules are intended for use in other Python programs to organize code into reusable components.
In Python, a ____ is a function that wraps another function, modifying its behavior.
- class
- decorator
- generator
- module
In Python, a decorator is a function that wraps another function, allowing you to modify or extend its behavior without changing its source code. Decorators are commonly used for tasks such as adding logging, authentication, or caching to functions.
In Python, a metaclass is a subclass of _____.
- class
- function
- object
- type
In Python, a metaclass is a class that defines the behavior of other classes. It is always a subclass of the built-in type class. A metaclass is responsible for creating and initializing new classes.
In Python, how do you define a method inside a class to access and modify the objects’ attributes?
- def method(self):
- function method():
- method = def():
- self.method = function():
In Python, to define a method inside a class that can access and modify object attributes, you use the def method(self): syntax. The self parameter allows you to access and manipulate the object's attributes within the method.
In Python, if you don’t specify a metaclass for a new class, it will implicitly use ____ as its metaclass.
- base
- metaclass
- object
- type
In Python, if you don't specify a metaclass for a new class, it will implicitly use type as its metaclass. type is the default metaclass for all classes unless otherwise specified.