Decorators In Depth MCQs with Explanations

Decorators are functions that enhance or modify the behavior of other functions.

Decorators are defined using the @decorator_name syntax above a function definition.

Decorators are used to add or modify functionalities of functions without changing their code.

Arguments can be passed to decorators using the @decorator(arg) syntax.

Decorators are often used to add features like logging, authentication, or authorization to functions.

The order of applying decorators can affect the order in which their functionalities are executed.

Higher-order functions accept functions as arguments and/or return functions as results.

A decorator that takes arguments is applied using the @decorator(arg) syntax.

functools.wraps() preserves the original function's metadata when using decorators.

Function-based decorators are generally more flexible and can accept arguments more easily than class-based decorators.

A decorator is applied to a class method using the @decorator syntax above the method definition.

The property decorator is used to define a getter method for a class attribute.

The @staticmethod decorator allows a method to be called without creating an instance of the class.

The @classmethod decorator can access class attributes, while @staticmethod cannot.

The @classmethod decorator is used to define a method that operates on the class and not just instances.

The @classmethod decorator is applied above the method definition using the @classmethod syntax.

The @abstractmethod decorator indicates that a method must be overridden in subclasses.

You create a custom decorator by defining a function and using the @decorator_name syntax.

The functools.partial function is used to create a new function with some arguments pre-filled.

You can remove a decorator by removing the @decorator syntax from the function.

A memoization decorator is used to cache the results of a function to improve performance.

The @lru_cache decorator is used to cache function results with a limited size using the Least Recently Used strategy.

The @contextmanager decorator allows a function to act as a context manager with the with statement.

The @dataclass decorator simplifies the creation of classes for storing and manipulating data.