ExamAdept

How can you create a decorator that takes arguments?

A:

Using the @staticmethod decorator

B:

Using the @functools.wraps decorator

C:

By defining a higher-order function that returns the actual decorator

D:

By using the @classmethod decorator

Answer: C

To create a decorator that takes arguments, you can define a higher-order function that returns the actual decorator based on the provided arguments.

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Which decorator is used to ensure that a function is only executed after a certain condition is met?

A:

@functools.lru_cache

B:

@functools.wraps

C:

@functools.singledispatch

D:

@functools.singledispatchmethod

Answer: D

There is no built-in @functools.singledispatchmethod decorator in Python, but a custom decorator can be created to execute a function based on a specified condition.

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What is the primary purpose of the @functools.singledispatch decorator?

A:

Converts a method to a class method

B:

Enables function overloading based on argument types

C:

Indicates a method is an instance method

D:

Decorates a method with dynamic behavior

Answer: B

The @functools.singledispatch decorator in Python is used to enable function overloading based on the type of the first argument.

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Which decorator can be used to measure the execution time of a Python function?

A:

@functools.lru_cache

B:

@functools.singledispatch

C:

@functools.wraps

D:

@functools.timer

Answer: D

There is no built-in @functools.timer decorator in Python, but a custom timer decorator can be created using external libraries or by measuring time manually.

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What happens when you use the @classmethod decorator on a method in a Python class?

A:

Marks the method as a static method

B:

Converts the method to a class method

C:

Indicates the method is an instance method

D:

Decorates the method with dynamic behavior

Answer: B

The @classmethod decorator is used to convert a method into a class method, allowing it to access and modify class-level attributes, rather than instance-level attributes.

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Questions for: Decorators