PCPP-32-101 1.4 Understand Extended Function Argument Syntax and Use Decorators PCPP-32-1 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   In a class-based decorator, why is __call__ necessary?

   • ASo the decorated function can be called
   • BSo the class can be instantiated
   • CSo the class can be inherited
   • DSo the class can be imported
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   How do you create a decorator that accepts arguments?

   • ABy using the @classmethod decorator
   • BBy defining the decorator with *args only
   • CBy nesting a decorator factory that returns the actual decorator
   • DBy using the @staticmethod decorator
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4. 18foundation · easy

   What does the * operator do when used in a function call, such as `func(*my_list)`?

   • AIt creates a copy of the iterable
   • BIt converts the iterable to a tuple
   • CIt unpacks the iterable into positional arguments
   • DIt packs the iterable into a single argument
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5. 19foundation · easy

   In the following code, what value does `inner` capture from the enclosing scope? def outer(x): def inner(): return x + 1 return inner f = outer(10)

   • ANothing; inner has no access to x
   • BThe value 10
   • CThe function outer
   • DThe value 1
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6. 20foundation · easy

   Which metadata does functools.wraps preserve from the original function?

   • AThe function's return value
   • BThe function's name and docstring
   • CThe function's bytecode
   • DThe function's local variables
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