ExamAdept

What is the purpose of the @functools.lru_cache decorator's typed parameter?

A:

It enforces strong typing for the cached values.

B:

It uses a different cache for each data type.

C:

It enables caching for functions with different argument types.

D:

It specifies the maximum size of the cache.

Answer: B

The @functools.lru_cache decorator's typed parameter, when set to True, uses a different cache for each distinct data type, preventing collisions between values of different types.

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Which decorator is commonly used for rate-limiting function calls?

A:

@functools.ratelimit

B:

@functools.limitrate

C:

@functools.ratelimiter

D:

@functools.limitcalls

Answer: A

There is no built-in @functools.ratelimit decorator in Python, but custom decorators can be created for rate-limiting function calls.

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How does the @property decorator differ from the @staticmethod decorator?

A:

@property is used for dynamic property access, while @staticmethod is used for class-level attribute access.

B:

@property is used to define read-only properties, while @staticmethod is used to convert a method to a class method.

C:

@property is used for dynamic method invocation, while @staticmethod is used to indicate a method is an instance method.

D:

@property is used to convert a method to a class method, while @staticmethod is used for dynamic method invocation.

Answer: B

@property is used to define read-only properties without the need for explicit getter methods. @staticmethod is used to mark a method as a static method within a class.

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Which decorator is commonly used for retrying a function with a specified delay in case of failure?

A:

@functools.retry

B:

@functools.retry_on_fail

C:

@functools.retriable

D:

@functools.retry_with_delay

Answer: A

There is no built-in @functools.retry decorator in Python, but custom decorators can be created for retrying a function with a specified delay in case of failure.

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How does the @staticmethod decorator differ from the @classmethod decorator?

A:

@staticmethod is used for dynamic method invocation, while @classmethod is used for class-level attribute access.

B:

@staticmethod can be called on instances and the class itself, while @classmethod is only callable on instances.

C:

@staticmethod is used to convert a method to a class method, while @classmethod is used to mark a method as a static method.

D:

@staticmethod is used to indicate a method is an instance method, while @classmethod is used for dynamic method invocation.

Answer: B

@staticmethod allows a method to be called on both instances and the class itself, while @classmethod is specifically for class-level attribute access and can only be called on instances.

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Questions for: Decorators