ExamAdept

What is the purpose of the **kwargs in a function definition?

A:

To indicate a keyword argument.

B:

To specify default values for arguments.

C:

To allow the function to accept a variable number of keyword arguments.

D:

To define a dictionary of arguments.

Answer: C

The **kwargs in a function definition allows the function to accept a variable number of keyword arguments, which are passed as a dictionary.

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What is the purpose of the functools.wraps decorator?

A:

To create wrapper functions.

B:

To wrap an iterable.

C:

To preserve the original metadata of a decorated function.

D:

To wrap a class method.

Answer: C

The functools.wraps decorator in Python is used to preserve the original metadata of a decorated function, such as its name and docstring.

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What is the purpose of the os.path.join() function?

A:

To join two strings together.

B:

To concatenate two lists.

C:

To join path components intelligently.

D:

To join elements in a tuple.

Answer: C

The os.path.join() function in Python is used to join path components intelligently, taking care of the correct path separator.

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What does the __call__ method do in a Python class?

A:

It calls the constructor of the class.

B:

It calls the destructor of the class.

C:

It allows an instance of the class to be called as a function.

D:

It checks if an instance is callable.

Answer: C

The __call__ method in a Python class allows an instance of the class to be called as if it were a function.

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What is the purpose of the functools.lru_cache decorator?

A:

To create a local variable with cache.

B:

To create a global variable with cache.

C:

To cache the results of a function, saving time for repeated calls with the same arguments.

D:

To limit the number of recursive calls in a function.

Answer: C

The functools.lru_cache decorator in Python is used to cache the results of a function, reducing the computation time for repeated calls with the same arguments.

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Questions for: Functions